Merge pull request #17743 from Shadowghost/migration-logging

Add progress logging to data migrations

.config/dotnet-tools.json

@@ -3,7 +3,7 @@
   "isRoot": true,
   "tools": {
     "dotnet-ef": {
-      "version": "10.0.10",
+      "version": "10.0.11",
       "commands": [
         "dotnet-ef"
       ]

.github/workflows/ci-codeql-analysis.yml

@@ -32,13 +32,13 @@ jobs:
         dotnet-version: '10.0.x'
 
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@5595ccaf912efad79be6eef63a5619ff05969be3 # v4.37.6
+      uses: github/codeql-action/init@ff2f1c621b7f889edc0d3c761ac2e6a3f8cdb0dd # v4.37.7
       with:
         languages: ${{ matrix.language }}
         queries: +security-extended
 
     - name: Autobuild
-      uses: github/codeql-action/autobuild@5595ccaf912efad79be6eef63a5619ff05969be3 # v4.37.6
+      uses: github/codeql-action/autobuild@ff2f1c621b7f889edc0d3c761ac2e6a3f8cdb0dd # v4.37.7
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@5595ccaf912efad79be6eef63a5619ff05969be3 # v4.37.6
+      uses: github/codeql-action/analyze@ff2f1c621b7f889edc0d3c761ac2e6a3f8cdb0dd # v4.37.7

CONTRIBUTORS.md

@@ -143,6 +143,7 @@
  - [Smith00101010](https://github.com/Smith00101010)
  - [sorinyo2004](https://github.com/sorinyo2004)
  - [Soumyadip Auddy](https://github.com/SoumyadipAuddy)
+ - [st7105](https://github.com/st7105)
  - [sparky8251](https://github.com/sparky8251)
  - [spookbits](https://github.com/spookbits)
  - [ssenart](https://github.com/ssenart)
@@ -237,6 +238,8 @@
  - [elio42](https://github.com/elio42)
  - [rwebster85](https://github.com/rwebster85)
  - [Florin-Popescu](https://github.com/Florin-Popescu)
+ - [m0g3r](https://github.com/m0g3r)
+ - [martin-77](https://github.com/martin-77)
 
 # Emby Contributors
 
@@ -247,7 +250,7 @@
  - [Mark2xv](https://github.com/Mark2xv)
  - [ScottRapsey](https://github.com/ScottRapsey)
  - [skynet600](https://github.com/skynet600)
- - [Cheesegeezer](https://githum.com/Cheesegeezer)
+ - [Cheesegeezer](https://github.com/Cheesegeezer)
  - [Radeon](https://github.com/radeonorama)
  - [gcw07](https://github.com/gcw07)
  - [SivaramAdhiappan](https://github.com/shivaram1190)

Directory.Packages.props

@@ -26,28 +26,28 @@
     <PackageVersion Include="libse" Version="4.0.12" />
     <PackageVersion Include="LrcParser" Version="2025.623.0" />
     <PackageVersion Include="MetaBrainz.MusicBrainz" Version="8.0.1" />
-    <PackageVersion Include="Microsoft.AspNetCore.Authorization" Version="10.0.10" />
-    <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="10.0.10" />
+    <PackageVersion Include="Microsoft.AspNetCore.Authorization" Version="10.0.11" />
+    <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="10.0.11" />
     <PackageVersion Include="Microsoft.CodeAnalysis.BannedApiAnalyzers" Version="5.6.0" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.Common" Version="5.6.0" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="5.6.0" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="5.6.0" />
-    <PackageVersion Include="Microsoft.Data.Sqlite" Version="10.0.10" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.10" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore.Relational" Version="10.0.10" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore.Sqlite" Version="10.0.10" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore.Tools" Version="10.0.10" />
-    <PackageVersion Include="Microsoft.Extensions.Caching.Abstractions" Version="10.0.10" />
-    <PackageVersion Include="Microsoft.Extensions.Caching.Memory" Version="10.0.10" />
-    <PackageVersion Include="Microsoft.Extensions.Configuration.Abstractions" Version="10.0.10" />
-    <PackageVersion Include="Microsoft.Extensions.Configuration.Binder" Version="10.0.10" />
-    <PackageVersion Include="Microsoft.Extensions.DependencyInjection" Version="10.0.10" />
-    <PackageVersion Include="Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore" Version="10.0.10" />
-    <PackageVersion Include="Microsoft.Extensions.Hosting.Abstractions" Version="10.0.10" />
-    <PackageVersion Include="Microsoft.Extensions.Http" Version="10.0.10" />
-    <PackageVersion Include="Microsoft.Extensions.Logging" Version="10.0.10" />
-    <PackageVersion Include="Microsoft.Extensions.Options" Version="10.0.10" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.8.1" />
+    <PackageVersion Include="Microsoft.CodeAnalysis.Common" Version="5.9.0" />
+    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="5.9.0" />
+    <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="5.9.0" />
+    <PackageVersion Include="Microsoft.Data.Sqlite" Version="10.0.11" />
+    <PackageVersion Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.11" />
+    <PackageVersion Include="Microsoft.EntityFrameworkCore.Relational" Version="10.0.11" />
+    <PackageVersion Include="Microsoft.EntityFrameworkCore.Sqlite" Version="10.0.11" />
+    <PackageVersion Include="Microsoft.EntityFrameworkCore.Tools" Version="10.0.11" />
+    <PackageVersion Include="Microsoft.Extensions.Caching.Abstractions" Version="10.0.11" />
+    <PackageVersion Include="Microsoft.Extensions.Caching.Memory" Version="10.0.11" />
+    <PackageVersion Include="Microsoft.Extensions.Configuration.Abstractions" Version="10.0.11" />
+    <PackageVersion Include="Microsoft.Extensions.Configuration.Binder" Version="10.0.11" />
+    <PackageVersion Include="Microsoft.Extensions.DependencyInjection" Version="10.0.11" />
+    <PackageVersion Include="Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore" Version="10.0.11" />
+    <PackageVersion Include="Microsoft.Extensions.Hosting.Abstractions" Version="10.0.11" />
+    <PackageVersion Include="Microsoft.Extensions.Http" Version="10.0.11" />
+    <PackageVersion Include="Microsoft.Extensions.Logging" Version="10.0.11" />
+    <PackageVersion Include="Microsoft.Extensions.Options" Version="10.0.11" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.9.0" />
     <PackageVersion Include="MimeTypes" Version="2.5.2" />
     <PackageVersion Include="Morestachio" Version="5.0.1.670" />
     <PackageVersion Include="Moq" Version="4.18.4" />
@@ -78,11 +78,11 @@
     <PackageVersion Include="Svg.Skia" Version="3.7.0" />
     <PackageVersion Include="Swashbuckle.AspNetCore.ReDoc" Version="10.2.3" />
     <PackageVersion Include="Swashbuckle.AspNetCore" Version="10.2.3" />
-    <PackageVersion Include="System.Text.Json" Version="10.0.10" />
+    <PackageVersion Include="System.Text.Json" Version="10.0.11" />
     <PackageVersion Include="TagLibSharp" Version="2.3.0" />
-    <PackageVersion Include="z440.atl.core" Version="7.15.3" />
+    <PackageVersion Include="z440.atl.core" Version="7.16.0" />
     <PackageVersion Include="TMDbLib" Version="3.0.0" />
-    <PackageVersion Include="UTF.Unknown" Version="2.6.0" />
+    <PackageVersion Include="UTF.Unknown" Version="2.7.0" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5" />
     <PackageVersion Include="xunit.v3" Version="3.2.2" />
     <PackageVersion Include="Xunit.v3.Priority" Version="1.1.18" />

Emby.Naming/Common/NamingOptions.cs

@@ -151,7 +151,7 @@ namespace Emby.Naming.Common
 
             CleanStrings =
             [
-                @"^\s*(?<cleaned>.+?)[ _\,\.\(\)\[\]\-](3d|sbs|tab|hsbs|htab|mvc|HDR|HDC|UHD|UltraHD|4k|ac3|dts|custom|dc|divx|divx5|dsr|dsrip|dutch|dvd|dvdrip|dvdscr|dvdscreener|screener|dvdivx|cam|fragment|fs|hdtv|hdrip|hdtvrip|internal|limited|multi|subs|ntsc|ogg|ogm|pal|pdtv|proper|repack|rerip|retail|cd[1-9]|r5|bd5|bd|se|svcd|swedish|german|read.nfo|nfofix|unrated|ws|telesync|ts|telecine|tc|brrip|bdrip|480p|480i|576p|576i|720p|720i|1080p|1080i|2160p|hrhd|hrhdtv|hddvd|bluray|blu-ray|x264|x265|h264|h265|xvid|xvidvd|xxx|www.www|AAC|DTS)(?=[ _\,\.\(\)\[\]\-]|$)",
+                @"^\s*(?<cleaned>.+?)[ _\,\.\(\)\[\]\-](3d|sbs|tab|hsbs|htab|mvc|HDR|HDC|UHD|UltraHD|4k|ac3|dts|custom|dc|divx|divx5|dsr|dsrip|dutch|dvd|dvdrip|dvdscr|dvdscreener|screener|dvdivx|cam|fragment|fs|hdtv|hdrip|hdtvrip|internal|limited|multi|subs|ntsc|ogg|ogm|pal|pdtv|proper|repack|rerip|retail|cd[1-9]|r5|bd5|bd|se|svcd|swedish|german|read.nfo|nfofix|unrated|ws|web-dl|telesync|ts|telecine|tc|brrip|bdrip|480p|480i|576p|576i|720p|720i|1080p|1080i|2160p|hrhd|hrhdtv|hddvd|bluray|blu-ray|x264|x265|h264|h265|xvid|xvidvd|xxx|www.www|AAC|DTS)(?=[ _\,\.\(\)\[\]\-]|$)",
                 @"^\s*(?<cleaned>.+?)((\s*\[[^\]]+\]\s*)+)(\.[^\s]+)?$",
                 @"^\s*(?<cleaned>.+?)\WE[0-9]+(-|~)E?[0-9]+(\W|$)",
                 @"^\s*\[[^\]]+\](?!\.\w+$)\s*(?<cleaned>.+)",

Emby.Server.Implementations/Collections/CollectionManager.cs

@@ -107,7 +107,8 @@ namespace Emby.Server.Implementations.Collections
                 SaveLocalMetadata = true
             };
 
-            var name = _localizationManager.GetLocalizedString("Collections");
+            // This names a library for the whole server, so ignore the requesting client's language.
+            var name = _localizationManager.GetServerLocalizedString("Collections");
 
             await _libraryManager.AddVirtualFolder(name, CollectionTypeOptions.boxsets, libraryOptions, true).ConfigureAwait(false);
 

Emby.Server.Implementations/Dto/DtoService.cs

@@ -192,7 +192,7 @@ namespace Emby.Server.Implementations.Dto
                 var folderIds = accessibleItems.OfType<Folder>().Select(f => f.Id).ToList();
                 if (folderIds.Count > 0)
                 {
-                    childCountBatch = _libraryManager.GetChildCountBatch(folderIds, user?.Id);
+                    childCountBatch = _libraryManager.GetChildCountBatch(folderIds, user);
                 }
             }
 
@@ -611,7 +611,11 @@ namespace Emby.Server.Implementations.Dto
                     // For these types we can try to optimize and assume these values will be equal
                     if (item is MusicAlbum || item is Season || item is Playlist)
                     {
-                        dto.ChildCount = dto.RecursiveItemCount;
+                        if (dto.RecursiveItemCount > 0)
+                        {
+                            dto.ChildCount = dto.RecursiveItemCount;
+                        }
+
                         var folderChildCount = folder.LinkedChildren.Length;
                         // The default is an empty array, so we can't reliably use the count when it's empty
                         if (folderChildCount > 0)
@@ -696,7 +700,8 @@ namespace Emby.Server.Implementations.Dto
                 return count;
             }
 
-            // Fall back to individual query for special cases (Series, Season, etc.)
+            // Only reached when no batch was computed: the batch holds an entry for every folder it
+            // was asked about, zero included.
             return folder.GetChildCount(user);
         }
 

Emby.Server.Implementations/Library/LibraryManager.cs

@@ -1745,9 +1745,9 @@ namespace Emby.Server.Implementations.Library
             return _countService.GetItemCountsForNameItem(kind, id, relatedItemKinds, query);
         }
 
-        public Dictionary<Guid, int> GetChildCountBatch(IReadOnlyList<Guid> parentIds, Guid? userId)
+        public Dictionary<Guid, int> GetChildCountBatch(IReadOnlyList<Guid> parentIds, User? user)
         {
-            return _countService.GetChildCountBatch(parentIds, userId);
+            return _countService.GetChildCountBatch(parentIds, user);
         }
 
         /// <inheritdoc/>
@@ -1914,14 +1914,14 @@ namespace Emby.Server.Implementations.Library
             }
 
             // Optimize by querying against top level views
-            query.TopParentIds = parents.SelectMany(i => GetTopParentIdsForQuery(i, query.User)).ToArray();
-            query.AncestorIds = [];
-
-            // Prevent searching in all libraries due to empty filter
-            if (query.TopParentIds.Length == 0)
+            var topParentIds = parents.SelectMany(i => GetTopParentIdsForQuery(i, query.User)).ToArray();
+            if (topParentIds.Length == 0)
             {
-                query.TopParentIds = [Guid.NewGuid()];
+                return;
             }
+
+            query.TopParentIds = topParentIds;
+            query.AncestorIds = [];
         }
 
         public QueryResult<(BaseItem Item, ItemCounts ItemCounts)> GetAlbumArtists(InternalItemsQuery query)
@@ -1967,12 +1967,15 @@ namespace Emby.Server.Implementations.Library
             if (parents.All(i => i is ICollectionFolder || i is UserView))
             {
                 // Optimize by querying against top level views
-                query.TopParentIds = parents.SelectMany(i => GetTopParentIdsForQuery(i, query.User)).ToArray();
+                var topParentIds = parents.SelectMany(i => GetTopParentIdsForQuery(i, query.User)).ToArray();
 
-                // Prevent searching in all libraries due to empty filter
-                if (query.TopParentIds.Length == 0)
+                if (topParentIds.Length > 0)
                 {
-                    query.TopParentIds = [Guid.NewGuid()];
+                    query.TopParentIds = topParentIds;
+                }
+                else
+                {
+                    SetAncestorIds(query, parents);
                 }
             }
             else if (parents.Count == 1 && parents.First() is Folder folder
@@ -1981,34 +1984,31 @@ namespace Emby.Server.Implementations.Library
             {
                 // Playlists and BoxSets store their contents in LinkedChildren and never
                 // populate AncestorIds for those items, so a recursive AncestorIds query
-                // would return zero rows. Resolve to the linked child IDs up front and
-                // route through the existing indexed ItemIds filter.
-                query.ItemIds = folder.LinkedChildren
-                    .Where(lc => lc.ItemId.HasValue && !lc.ItemId.Value.IsEmpty())
-                    .Select(lc => lc.ItemId!.Value)
-                    .ToArray();
-
-                // Empty linked-children should still return empty rather than scanning everything.
-                if (query.ItemIds.Length == 0)
-                {
-                    query.ItemIds = [Guid.NewGuid()];
-                }
+                // would return zero rows. Filter by the descendant set instead, which follows
+                // the links and keeps descending, so a linked folder contributes what is below
+                // it as well - the episodes of a Series added to a collection, for example.
+                query.DescendantOfId = folder.Id;
             }
             else
             {
-                // We need to be able to query from any arbitrary ancestor up the tree
-                query.AncestorIds = parents.SelectMany(i => i.GetIdsForAncestorQuery()).ToArray();
-
-                // Prevent searching in all libraries due to empty filter
-                if (query.AncestorIds.Length == 0)
-                {
-                    query.AncestorIds = [Guid.NewGuid()];
-                }
+                SetAncestorIds(query, parents);
             }
 
             query.Parent = null;
         }
 
+        private static void SetAncestorIds(InternalItemsQuery query, IReadOnlyCollection<BaseItem> parents)
+        {
+            // We need to be able to query from any arbitrary ancestor up the tree
+            query.AncestorIds = parents.SelectMany(i => i.GetIdsForAncestorQuery()).ToArray();
+
+            // Prevent searching in all libraries due to empty filter
+            if (query.AncestorIds.Length == 0)
+            {
+                query.AncestorIds = [Guid.NewGuid()];
+            }
+        }
+
         private void AddUserToQuery(InternalItemsQuery query, User user, bool allowExternalContent = true)
         {
             if (query.User is null)
@@ -2519,9 +2519,15 @@ namespace Emby.Server.Implementations.Library
                     }
                 }
 
-                if (!File.Exists(image.Path))
+                if (string.IsNullOrEmpty(image.Path) || !File.Exists(image.Path))
                 {
-                    _logger.LogWarning("Image not found at {ImagePath}", image.Path);
+                    _logger.LogWarning(
+                        "{ImageType} image for {ItemName} ({ItemId}) not found at \"{ImagePath}\", source was {SourcePath}",
+                        img.Type,
+                        item.Name,
+                        item.Id,
+                        image.Path,
+                        img.Path);
                     continue;
                 }
 
@@ -2919,7 +2925,8 @@ namespace Emby.Server.Implementations.Library
                 "views",
                 _fileSystem.GetValidFilename(viewType.ToString()));
 
-            var id = GetNewItemId(path + "_namedview_" + name, typeof(UserView));
+            // The display name is localized, so it must not take part in the id.
+            var id = GetNewItemId(path + "_namedview_" + viewType.ToString(), typeof(UserView));
 
             var item = GetItemById(id) as UserView;
 
@@ -2943,6 +2950,13 @@ namespace Emby.Server.Implementations.Library
 
                 refresh = true;
             }
+            else if (!string.Equals(item.Name, name, StringComparison.Ordinal))
+            {
+                item.Name = name;
+                item.ForcedSortName = sortName;
+
+                refresh = true;
+            }
 
             if (refresh)
             {
@@ -2963,7 +2977,9 @@ namespace Emby.Server.Implementations.Library
             var parentIdString = parentId.IsEmpty()
                 ? null
                 : parentId.ToString("N", CultureInfo.InvariantCulture);
-            var idValues = "38_namedview_" + name + user.Id.ToString("N", CultureInfo.InvariantCulture) + (parentIdString ?? string.Empty) + (viewType?.ToString() ?? string.Empty);
+
+            // The name is either localized (grouped views) or the library folder's own name.
+            var idValues = "38_namedview_" + user.Id.ToString("N", CultureInfo.InvariantCulture) + (parentIdString ?? string.Empty) + (viewType?.ToString() ?? string.Empty);
 
             var id = GetNewItemId(idValues, typeof(UserView));
 
@@ -2993,6 +3009,11 @@ namespace Emby.Server.Implementations.Library
 
                 isNew = true;
             }
+            else if (!string.Equals(item.Name, name, StringComparison.Ordinal))
+            {
+                item.Name = name;
+                item.UpdateToRepositoryAsync(ItemUpdateType.MetadataEdit, CancellationToken.None).GetAwaiter().GetResult();
+            }
 
             var lastRefreshedUtc = item.DateLastRefreshed;
             var refresh = isNew || DateTime.UtcNow - lastRefreshedUtc >= _viewRefreshInterval;
@@ -3094,7 +3115,7 @@ namespace Emby.Server.Implementations.Library
             var parentIdString = parentId.IsEmpty()
                 ? null
                 : parentId.ToString("N", CultureInfo.InvariantCulture);
-            var idValues = "37_namedview_" + name + (parentIdString ?? string.Empty) + (viewType?.ToString() ?? string.Empty);
+            var idValues = "37_namedview_" + (parentIdString ?? string.Empty) + (viewType?.ToString() ?? string.Empty);
             if (!string.IsNullOrEmpty(uniqueId))
             {
                 idValues += uniqueId;
@@ -3128,9 +3149,10 @@ namespace Emby.Server.Implementations.Library
                 isNew = true;
             }
 
-            if (viewType != item.ViewType)
+            if (viewType != item.ViewType || !string.Equals(item.Name, name, StringComparison.Ordinal))
             {
                 item.ViewType = viewType;
+                item.Name = name;
                 item.UpdateToRepositoryAsync(ItemUpdateType.MetadataEdit, CancellationToken.None).GetAwaiter().GetResult();
             }
 
@@ -3550,6 +3572,12 @@ namespace Emby.Server.Implementations.Library
             return _peopleRepository.GetPeopleNames(query);
         }
 
+        /// <inheritdoc/>
+        public int DeleteOrphanedCredits()
+        {
+            return _peopleRepository.DeleteOrphanedCredits();
+        }
+
         /// <inheritdoc/>
         public IReadOnlyDictionary<Guid, IReadOnlyList<string>> GetPeopleNamesByItems(IReadOnlyList<Guid> itemIds, IReadOnlyList<string> personTypes)
         {
@@ -3595,7 +3623,20 @@ namespace Emby.Server.Implementations.Library
 
                     await item.UpdateToRepositoryAsync(ItemUpdateType.ImageUpdate, CancellationToken.None).ConfigureAwait(false);
 
-                    return item.GetImageInfo(image.Type, imageIndex);
+                    var localImage = item.GetImageInfo(image.Type, imageIndex);
+                    if (localImage is null)
+                    {
+                        throw new InvalidOperationException(string.Format(
+                            CultureInfo.InvariantCulture,
+                            "Downloaded {0} image {1} from {2} is not attached to {3} ({4})",
+                            image.Type,
+                            imageIndex,
+                            url,
+                            item.Name,
+                            item.Id));
+                    }
+
+                    return localImage;
                 }
                 catch (HttpRequestException ex)
                 {
@@ -3617,7 +3658,13 @@ namespace Emby.Server.Implementations.Library
                 await item.UpdateToRepositoryAsync(ItemUpdateType.ImageUpdate, CancellationToken.None).ConfigureAwait(false);
             }
 
-            throw new InvalidOperationException("Unable to convert any images to local");
+            throw new InvalidOperationException(string.Format(
+                CultureInfo.InvariantCulture,
+                "Unable to convert any {0} image url in \"{1}\" to a local file for {2} ({3})",
+                image.Type,
+                image.Path,
+                item.Name,
+                item.Id));
         }
 
         public async Task AddVirtualFolder(string name, CollectionTypeOptions? collectionType, LibraryOptions options, bool refreshLibrary)
@@ -3797,7 +3844,9 @@ namespace Emby.Server.Implementations.Library
             }
 
             var rootFolderPath = _configurationManager.ApplicationPaths.DefaultUserViewsPath;
-            var virtualFolderPath = Path.Combine(rootFolderPath, virtualFolderName);
+            var virtualFolderPath = FileSystemHelper.GetChildPath(rootFolderPath, virtualFolderName)
+                ?? throw new FileNotFoundException(
+                    string.Format(CultureInfo.InvariantCulture, "The media collection {0} does not exist", virtualFolderName));
 
             CreateShortcut(virtualFolderPath, pathInfo);
 
@@ -3818,7 +3867,9 @@ namespace Emby.Server.Implementations.Library
             ArgumentNullException.ThrowIfNull(mediaPath);
 
             var rootFolderPath = _configurationManager.ApplicationPaths.DefaultUserViewsPath;
-            var virtualFolderPath = Path.Combine(rootFolderPath, virtualFolderName);
+            var virtualFolderPath = FileSystemHelper.GetChildPath(rootFolderPath, virtualFolderName)
+                ?? throw new FileNotFoundException(
+                    string.Format(CultureInfo.InvariantCulture, "The media collection {0} does not exist", virtualFolderName));
 
             var libraryOptions = CollectionFolder.GetLibraryOptions(virtualFolderPath);
 
@@ -3857,9 +3908,9 @@ namespace Emby.Server.Implementations.Library
 
             var rootFolderPath = _configurationManager.ApplicationPaths.DefaultUserViewsPath;
 
-            var path = Path.Combine(rootFolderPath, name);
+            var path = FileSystemHelper.GetChildPath(rootFolderPath, name);
 
-            if (!Directory.Exists(path))
+            if (path is null || !Directory.Exists(path))
             {
                 throw new FileNotFoundException("The media folder does not exist");
             }
@@ -3923,9 +3974,9 @@ namespace Emby.Server.Implementations.Library
             ArgumentException.ThrowIfNullOrEmpty(mediaPath);
 
             var rootFolderPath = _configurationManager.ApplicationPaths.DefaultUserViewsPath;
-            var virtualFolderPath = Path.Combine(rootFolderPath, virtualFolderName);
+            var virtualFolderPath = FileSystemHelper.GetChildPath(rootFolderPath, virtualFolderName);
 
-            if (!Directory.Exists(virtualFolderPath))
+            if (virtualFolderPath is null || !Directory.Exists(virtualFolderPath))
             {
                 throw new FileNotFoundException(
                     string.Format(CultureInfo.InvariantCulture, "The media collection {0} does not exist", virtualFolderName));

Emby.Server.Implementations/Library/Resolvers/TV/SeasonResolver.cs

@@ -99,7 +99,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
                         args.LibraryOptions.SeasonZeroDisplayName :
                         string.Format(
                             CultureInfo.InvariantCulture,
-                            _localization.GetLocalizedString("NameSeasonNumber"),
+                            _localization.GetServerLocalizedString("NameSeasonNumber"),
                             seasonNumber,
                             args.LibraryOptions.PreferredMetadataLanguage);
                 }
@@ -129,6 +129,17 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
 
             var tmdbId = justName.GetAttributeValue("tmdbid");
             item.TrySetProviderId(MetadataProvider.Tmdb, tmdbId);
+
+            // Anime databases model a single cour as its own entry, so a multi-season
+            // series maps to one of these ids per season rather than one per series.
+            var anidbId = justName.GetAttributeValue("anidbid");
+            item.TrySetProviderId("AniDB", anidbId);
+
+            var aniListId = justName.GetAttributeValue("anilistid");
+            item.TrySetProviderId("AniList", aniListId);
+
+            var aniSearchId = justName.GetAttributeValue("anisearchid");
+            item.TrySetProviderId("AniSearch", aniSearchId);
         }
     }
 }

Emby.Server.Implementations/Library/Search/SearchManager.cs

@@ -112,13 +112,12 @@ public class SearchManager : ISearchManager
             return externalResults;
         }
 
-        var internalResults = await internalTask.ConfigureAwait(false);
         if (_internalProviders.Length > 0)
         {
             _logger.LogDebug("No results from external providers, using internal provider results");
         }
 
-        return internalResults;
+        return await internalTask.ConfigureAwait(false);
     }
 
     private async Task<IReadOnlyList<SearchResult>> FilterByUserAccessAsync(
@@ -144,17 +143,16 @@ public class SearchManager : ISearchManager
 
             baseQuery = _queryHelpers.ApplyAccessFiltering(dbContext, baseQuery, accessFilter);
 
-            var allowedCount = await baseQuery.CountAsync(cancellationToken).ConfigureAwait(false);
-            if (allowedCount == candidates.Count)
-            {
-                return candidates;
-            }
-
             var allowedIds = await baseQuery
                 .Select(e => e.Id)
                 .ToHashSetAsync(cancellationToken)
                 .ConfigureAwait(false);
 
+            if (allowedIds.Count == candidates.Count)
+            {
+                return candidates;
+            }
+
             var filtered = candidates.Where(c => allowedIds.Contains(c.ItemId)).ToList();
             if (filtered.Count < candidates.Count)
             {

Emby.Server.Implementations/Library/SimilarItems/SimilarItemsAccessFilter.cs

@@ -0,0 +1,42 @@
+using Jellyfin.Data.Enums;
+using Jellyfin.Database.Implementations.Entities;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Library;
+
+namespace Emby.Server.Implementations.Library.SimilarItems;
+
+/// <summary>
+/// Builds the access filter that decides which items a similar-items lookup may return for a user.
+/// </summary>
+internal static class SimilarItemsAccessFilter
+{
+    private static readonly BaseItemKind[] _itemByNameKinds =
+    [
+        BaseItemKind.Person,
+        BaseItemKind.Genre,
+        BaseItemKind.MusicGenre,
+        BaseItemKind.MusicArtist,
+        BaseItemKind.Studio
+    ];
+
+    /// <summary>
+    /// Builds an access filter carrying the user's library access and parental restrictions.
+    /// </summary>
+    /// <param name="user">The user the lookup runs for.</param>
+    /// <param name="libraryManager">The library manager.</param>
+    /// <returns>The access filter.</returns>
+    public static InternalItemsQuery Build(User user, ILibraryManager libraryManager)
+    {
+        // IncludeItemTypes is read only for the by-name exemption here; the caller applies this
+        // filter through ApplyAccessFiltering, which does not translate it into a type restriction.
+        var accessFilter = new InternalItemsQuery(user)
+        {
+            IncludeItemTypes = _itemByNameKinds
+        };
+
+        // ConfigureUserAccess populates TopParentIds for the libraries the user may open.
+        libraryManager.ConfigureUserAccess(accessFilter, user);
+
+        return accessFilter;
+    }
+}

Emby.Server.Implementations/Library/SimilarItems/SimilarItemsManager.cs

@@ -7,8 +7,10 @@ using System.Text.Json;
 using System.Threading;
 using System.Threading.Tasks;
 using Jellyfin.Data.Enums;
+using Jellyfin.Database.Implementations;
 using Jellyfin.Database.Implementations.Entities;
 using Jellyfin.Database.Implementations.Enums;
+using Jellyfin.Extensions;
 using Jellyfin.Extensions.Json;
 using MediaBrowser.Common.Extensions;
 using MediaBrowser.Controller;
@@ -16,11 +18,13 @@ using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.Persistence;
 using MediaBrowser.Model.Configuration;
 using MediaBrowser.Model.Dto;
 using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.IO;
 using MediaBrowser.Model.Querying;
+using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Logging;
 
 namespace Emby.Server.Implementations.Library.SimilarItems;
@@ -35,6 +39,8 @@ public class SimilarItemsManager : ISimilarItemsManager
     private readonly ILibraryManager _libraryManager;
     private readonly IFileSystem _fileSystem;
     private readonly IServerConfigurationManager _serverConfigurationManager;
+    private readonly IDbContextFactory<JellyfinDbContext> _dbProvider;
+    private readonly IItemQueryHelpers _queryHelpers;
     private ISimilarItemsProvider[] _similarItemsProviders = [];
 
     /// <summary>
@@ -45,18 +51,24 @@ public class SimilarItemsManager : ISimilarItemsManager
     /// <param name="libraryManager">The library manager.</param>
     /// <param name="fileSystem">The file system.</param>
     /// <param name="serverConfigurationManager">The server configuration manager.</param>
+    /// <param name="dbProvider">The database context factory.</param>
+    /// <param name="queryHelpers">The shared item query helpers.</param>
     public SimilarItemsManager(
         ILogger<SimilarItemsManager> logger,
         IServerApplicationPaths appPaths,
         ILibraryManager libraryManager,
         IFileSystem fileSystem,
-        IServerConfigurationManager serverConfigurationManager)
+        IServerConfigurationManager serverConfigurationManager,
+        IDbContextFactory<JellyfinDbContext> dbProvider,
+        IItemQueryHelpers queryHelpers)
     {
         _logger = logger;
         _appPaths = appPaths;
         _libraryManager = libraryManager;
         _fileSystem = fileSystem;
         _serverConfigurationManager = serverConfigurationManager;
+        _dbProvider = dbProvider;
+        _queryHelpers = queryHelpers;
     }
 
     /// <inheritdoc/>
@@ -230,11 +242,64 @@ public class SimilarItemsManager : ISimilarItemsManager
             }
         }
 
-        return allResults
+        var ordered = allResults
             .OrderByDescending(x => x.Score)
             .Select(x => x.Item)
             .Take(requestedLimit)
             .ToList();
+
+        return await FilterByLibraryAccessAsync(ordered, user, cancellationToken).ConfigureAwait(false);
+    }
+
+    private async Task<IReadOnlyList<BaseItem>> FilterByLibraryAccessAsync(
+        IReadOnlyList<BaseItem> candidates,
+        User? user,
+        CancellationToken cancellationToken)
+    {
+        if (candidates.Count == 0 || user is null)
+        {
+            return candidates;
+        }
+
+        var accessFilter = SimilarItemsAccessFilter.Build(user, _libraryManager);
+
+        // No accessible libraries means nothing to compare against, and an empty TopParentIds set
+        // would disable the filter rather than reject everything.
+        if (accessFilter.TopParentIds.Length == 0)
+        {
+            return candidates;
+        }
+
+        Guid[] candidateIds = [.. candidates.Select(c => c.Id)];
+
+        var dbContext = await _dbProvider.CreateDbContextAsync(cancellationToken).ConfigureAwait(false);
+        await using (dbContext.ConfigureAwait(false))
+        {
+            var baseQuery = dbContext.BaseItems
+                .AsNoTracking()
+                .WhereOneOrMany(candidateIds, e => e.Id);
+
+            baseQuery = _queryHelpers.ApplyAccessFiltering(dbContext, baseQuery, accessFilter);
+
+            var allowedCount = await baseQuery.CountAsync(cancellationToken).ConfigureAwait(false);
+            if (allowedCount == candidates.Count)
+            {
+                return candidates;
+            }
+
+            var allowedIds = await baseQuery
+                .Select(e => e.Id)
+                .ToHashSetAsync(cancellationToken)
+                .ConfigureAwait(false);
+
+            var filtered = candidates.Where(c => allowedIds.Contains(c.Id)).ToList();
+            _logger.LogDebug(
+                "Dropped {Dropped} of {Total} similar-item candidates due to user access filtering",
+                candidates.Count - filtered.Count,
+                candidates.Count);
+
+            return filtered;
+        }
     }
 
     /// <inheritdoc/>
@@ -376,19 +441,39 @@ public class SimilarItemsManager : ISimilarItemsManager
 
         var batchResults = await batchProvider.GetBatchSimilarItemsAsync(baselineItems, query, cancellationToken).ConfigureAwait(false);
 
+        // Filter once across every category rather than per baseline, so a batch provider costs one
+        // access query no matter how many categories it produced.
+        var allItems = batchResults.Values.SelectMany(items => items).DistinctBy(item => item.Id).ToList();
+        var allowed = await FilterByLibraryAccessAsync(allItems, query.User, cancellationToken).ConfigureAwait(false);
+
+        HashSet<Guid>? allowedIds = allowed.Count == allItems.Count
+            ? null
+            : [.. allowed.Select(item => item.Id)];
+
         var recommendations = new List<SimilarItemsRecommendation>(baselineItems.Count);
         foreach (var baseline in baselineItems)
         {
-            if (batchResults.TryGetValue(baseline.Id, out var similar) && similar.Count > 0)
+            if (!batchResults.TryGetValue(baseline.Id, out var similar) || similar.Count == 0)
             {
-                recommendations.Add(new SimilarItemsRecommendation
-                {
-                    BaselineItemName = baseline.Name,
-                    CategoryId = baseline.Id,
-                    RecommendationType = recommendationType,
-                    Items = similar
-                });
+                continue;
             }
+
+            if (allowedIds is not null)
+            {
+                similar = similar.Where(item => allowedIds.Contains(item.Id)).ToList();
+                if (similar.Count == 0)
+                {
+                    continue;
+                }
+            }
+
+            recommendations.Add(new SimilarItemsRecommendation
+            {
+                BaselineItemName = baseline.Name,
+                CategoryId = baseline.Id,
+                RecommendationType = recommendationType,
+                Items = similar
+            });
         }
 
         return recommendations;

Emby.Server.Implementations/Library/UserViewManager.cs

@@ -112,7 +112,7 @@ namespace Emby.Server.Implementations.Library
 
             if (_config.Configuration.EnableFolderView)
             {
-                var name = _localizationManager.GetLocalizedString("Folders");
+                var name = _localizationManager.GetServerLocalizedString("Folders");
                 list.Add(_libraryManager.GetNamedView(name, CollectionType.folders, string.Empty));
             }
 
@@ -168,7 +168,7 @@ namespace Emby.Server.Implementations.Library
 
         public UserView GetUserSubView(Guid parentId, CollectionType? type, string localizationKey, string sortName)
         {
-            var name = _localizationManager.GetLocalizedString(localizationKey);
+            var name = _localizationManager.GetServerLocalizedString(localizationKey);
 
             return GetUserSubViewWithName(name, parentId, type, sortName);
         }
@@ -191,7 +191,7 @@ namespace Emby.Server.Implementations.Library
                 return GetUserView((Folder)parents[0], viewType, string.Empty);
             }
 
-            var name = _localizationManager.GetLocalizedString(localizationKey);
+            var name = _localizationManager.GetServerLocalizedString(localizationKey);
             return _libraryManager.GetNamedView(user, name, viewType, sortName);
         }
 
@@ -396,6 +396,12 @@ namespace Emby.Server.Implementations.Library
                     query.Limit = limit;
                     return _libraryManager.GetLatestItemList(query, parents, CollectionType.movies);
                 }
+
+                if (collectionType is null)
+                {
+                    query.Limit = limit;
+                    return _libraryManager.GetLatestItemList(query, parents, CollectionType.unknown);
+                }
             }
 
             return _libraryManager.GetItemList(query, parents);

Emby.Server.Implementations/Library/Validators/PeopleValidator.cs

@@ -49,6 +49,14 @@ public class PeopleValidator
     /// <returns>Task.</returns>
     public async Task ValidatePeople(CancellationToken cancellationToken, IProgress<double> progress)
     {
+        // Before the refresh below walks them: a credit no item maps to any more stands for nothing,
+        // and while it is there the person it names cannot reach the dead-person sweep either.
+        var numOrphaned = _libraryManager.DeleteOrphanedCredits();
+        if (numOrphaned > 0)
+        {
+            _logger.LogDebug("Deleted {Amount} credits no item maps to", numOrphaned);
+        }
+
         var people = _libraryManager.GetPeopleNames(new InternalPeopleQuery());
 
         var numComplete = 0;
@@ -115,6 +123,6 @@ public class PeopleValidator
 
         progress.Report(100);
 
-        _logger.LogInformation("People validation complete");
+        _logger.LogInformation("People validation complete, deleted {Orphaned} orphaned credits", numOrphaned);
     }
 }

Emby.Server.Implementations/Localization/Core/be.json

@@ -106,5 +106,11 @@
     "TaskExtractMediaSegments": "Сканіраванне медыя-сегмента",
     "TaskMoveTrickplayImages": "Перанесці месцазнаходжанне выявы Trickplay",
     "CleanupUserDataTask": "Задача па ачыстцы даных карыстальніка",
-    "CleanupUserDataTaskDescription": "Ачышчае ўсе даныя карыстальніка (стан прагляду, абранае і г.д.) для медыяфайлаў, што адсутнічаюць больш за 90 дзён."
+    "CleanupUserDataTaskDescription": "Ачышчае ўсе даныя карыстальніка (стан прагляду, абранае і г.д.) для медыяфайлаў, што адсутнічаюць больш за 90 дзён.",
+    "LyricDownloadFailureFromForItem": "Не ўдалося загрузіць тэкст песні з {0} для {1}",
+    "NameExtraDeletedScene": "Выдаленая сцэна",
+    "NameExtraInterview": "Інтэрв'ю",
+    "NameExtraNumbered": "{0} {1}",
+    "NameExtraScene": "Сцэна",
+    "NameExtraTrailer": "Трэйлер"
 }

Emby.Server.Implementations/Localization/Core/bg-BG.json

@@ -106,5 +106,20 @@
     "TaskMoveTrickplayImagesDescription": "Премества съществуващите trickplay изображения спрямо настройките на библиотеката.",
     "TaskExtractMediaSegments": "Сканиране за сегменти",
     "CleanupUserDataTask": "Задача за почистване на потребителски данни",
-    "CleanupUserDataTaskDescription": "Почиства всички потребителски данни (статус на гледане, любими и т.н.) от медия, която вече не е налична от поне 90 дни."
+    "CleanupUserDataTaskDescription": "Почиства всички потребителски данни (статус на гледане, любими и т.н.) от медия, която вече не е налична от поне 90 дни.",
+    "LyricDownloadFailureFromForItem": "Текстът на песента не успя да се изтегли от {0} за {1}",
+    "NameExtraBehindTheScenes": "Зад кулисите",
+    "NameExtraScene": "Сцена",
+    "NameExtraShort": "Откъс",
+    "NameExtraThemeVideo": "Тематично видео",
+    "NameExtraTrailer": "Трейлър",
+    "NameExtraUnknown": "Екстра",
+    "NameExtraClip": "Клип",
+    "NameExtraDeletedScene": "Изтрита Сцена",
+    "NameExtraFeaturette": "Кратък филм",
+    "NameExtraInterview": "Интервю",
+    "NameExtraNumbered": "{0} {1}",
+    "NameExtraSample": "Пример",
+    "NameExtraThemeSong": "Тема-песен",
+    "Original": "Оригинал"
 }

Emby.Server.Implementations/Localization/Core/da.json

@@ -51,7 +51,7 @@
     "Shows": "Serier",
     "StartupEmbyServerIsLoading": "Jellyfin er i gang med at starte. Prøv igen om et øjeblik.",
     "SubtitleDownloadFailureFromForItem": "Undertekster kunne ikke hentes fra {0} til {1}",
-    "TvShows": "TV-serier",
+    "TvShows": "Serier",
     "UserCreatedWithName": "Bruger {0} er blevet oprettet",
     "UserDeletedWithName": "Brugeren {0} er nu slettet",
     "UserDownloadingItemWithValues": "{0} henter {1}",
@@ -80,8 +80,8 @@
     "TaskRefreshChapterImagesDescription": "Laver miniaturebilleder for videoer, der har kapitler.",
     "TaskRefreshChannelsDescription": "Opdaterer information for internetkanaler.",
     "TaskRefreshChannels": "Opdatér kanaler",
-    "TaskCleanTranscodeDescription": "Fjerner omkodningsfiler, som er mere end 1 dag gamle.",
-    "TaskCleanTranscode": "Tøm omkodningsmappen",
+    "TaskCleanTranscodeDescription": "Fjerner transkodningsfiler, som er mere end 1 dag gamle.",
+    "TaskCleanTranscode": "Tøm transkodningsmappen",
     "TaskRefreshPeople": "Opdatér personer",
     "TaskRefreshPeopleDescription": "Opdaterer metadata for skuespillere og instruktører i dit mediebibliotek.",
     "TaskCleanActivityLogDescription": "Sletter linjer i aktivitetsloggen ældre end den konfigurerede alder.",
@@ -109,17 +109,17 @@
     "CleanupUserDataTaskDescription": "Rydder alle brugerdata (eks. visning- og favoritstatus) fra medier, der har været utilgængelige i mindst 90 dage.",
     "LyricDownloadFailureFromForItem": "Sangtekster kunne ikke downloades fra {0} til {1}",
     "Original": "Original",
-    "NameExtraBehindTheScenes": "Bag Scenerne",
+    "NameExtraBehindTheScenes": "Bag scenerne",
     "NameExtraClip": "Klip",
-    "NameExtraDeletedScene": "Slettet Scene",
+    "NameExtraDeletedScene": "Slettet scene",
     "NameExtraFeaturette": "Featurette",
     "NameExtraInterview": "Interview",
     "NameExtraNumbered": "{0} {1}",
     "NameExtraSample": "Smagsprøve",
     "NameExtraScene": "Scene",
     "NameExtraShort": "Kort",
-    "NameExtraThemeSong": "Tema Sang",
-    "NameExtraThemeVideo": "Tema Video",
+    "NameExtraThemeSong": "Temasang",
+    "NameExtraThemeVideo": "Temavideo",
     "NameExtraTrailer": "Trailer",
     "NameExtraUnknown": "Ekstra"
 }

Emby.Server.Implementations/Localization/Core/de.json

@@ -1,6 +1,6 @@
 {
     "AppDeviceValues": "App: {0}, Gerät: {1}",
-    "Artists": "Interpreten",
+    "Artists": "Künstler",
     "AuthenticationSucceededWithUserName": "{0} erfolgreich authentifiziert",
     "Books": "Bücher",
     "ChapterNameValue": "Kapitel {0}",

Emby.Server.Implementations/Localization/Core/en-GB.json

@@ -24,8 +24,8 @@
     "Music": "Music",
     "MusicVideos": "Music Videos",
     "NameInstallFailed": "{0} installation failed",
-    "NameSeasonNumber": "Season {0}",
-    "NameSeasonUnknown": "Season Unknown",
+    "NameSeasonNumber": "Series {0}",
+    "NameSeasonUnknown": "Series Unknown",
     "NewVersionIsAvailable": "A new version of Jellyfin Server is available for download.",
     "NotificationOptionApplicationUpdateAvailable": "Application update available",
     "NotificationOptionApplicationUpdateInstalled": "Application update installed",
@@ -108,5 +108,18 @@
     "CleanupUserDataTask": "User data cleanup task",
     "CleanupUserDataTaskDescription": "Cleans all user data (Watch state, favourite status etc) from media that is no longer present for at least 90 days.",
     "LyricDownloadFailureFromForItem": "Lyrics failed to download from {0} for {1}",
-    "Original": "Original"
+    "Original": "Original",
+    "NameExtraBehindTheScenes": "Behind The Scenes",
+    "NameExtraClip": "Clip",
+    "NameExtraDeletedScene": "Deleted Scene",
+    "NameExtraFeaturette": "Featurette",
+    "NameExtraInterview": "Interview",
+    "NameExtraSample": "Sample",
+    "NameExtraScene": "Scene",
+    "NameExtraShort": "Short",
+    "NameExtraThemeSong": "Theme Song",
+    "NameExtraThemeVideo": "Theme Video",
+    "NameExtraTrailer": "Trailer",
+    "NameExtraUnknown": "Extra",
+    "NameExtraNumbered": "{0} {1}"
 }

Emby.Server.Implementations/Localization/Core/eo.json

@@ -97,5 +97,9 @@
     "TaskAudioNormalizationDescription": "Skanas dosierojn por sonnivelaj normaligaj datumoj.",
     "TaskRefreshTrickplayImages": "Generi la bildojn por TrickPlay (Antaŭrigardo rapida antaŭen)",
     "TaskAudioNormalization": "Normaligo Sonnivela",
-    "HearingImpaired": "Surda"
+    "HearingImpaired": "Surda",
+    "NameExtraDeletedScene": "Forigita sceno",
+    "NameExtraScene": "Sceno",
+    "NameExtraThemeSong": "Tema Kanto",
+    "Original": "Originala"
 }

Emby.Server.Implementations/Localization/Core/eu.json

@@ -114,5 +114,12 @@
     "NameExtraScene": "Eszena",
     "NameExtraShort": "Laburra",
     "NameExtraThemeSong": "Gai-abestia",
-    "NameExtraThemeVideo": "Gai-bideoa"
+    "NameExtraThemeVideo": "Gai-bideoa",
+    "NameExtraBehindTheScenes": "Eszenen atzean",
+    "NameExtraClip": "Klipa",
+    "NameExtraDeletedScene": "Ezabatutako eszena",
+    "NameExtraFeaturette": "Erreportajea",
+    "NameExtraInterview": "Elkarrizketa",
+    "NameExtraTrailer": "Trailerra",
+    "NameExtraUnknown": "Extra"
 }

Emby.Server.Implementations/Localization/Core/fi.json

@@ -108,5 +108,10 @@
     "CleanupUserDataTask": "Käyttäjätietojen puhdistustehtävä",
     "CleanupUserDataTaskDescription": "Puhdistaa kaikki käyttäjätiedot (katselutila, suosikit ym.) medioista, joita ei ole ollut saatavilla yli 90 päivään.",
     "LyricDownloadFailureFromForItem": "Sanoitusten lataus kohteesta {0} kappaleelle {1} epäonnistui",
-    "Original": "Alkuperäinen"
+    "Original": "Alkuperäinen",
+    "NameExtraBehindTheScenes": "Kulissien Takana",
+    "NameExtraClip": "Klippi",
+    "NameExtraDeletedScene": "Poistettu Kohtaus",
+    "NameExtraFeaturette": "Lyhytelokuva",
+    "NameExtraInterview": "Haastattelu"
 }

Emby.Server.Implementations/Localization/Core/fo.json

@@ -1,6 +1,6 @@
 {
     "Artists": "Tónlistafólk",
-    "Collections": "Søvn",
+    "Collections": "Samlingar",
     "Default": "Forsett",
     "External": "Ytri",
     "Genres": "Greinar",
@@ -13,7 +13,7 @@
     "FailedLoginAttemptWithUserName": "Miseydnað innritanarroynd frá {0}",
     "HeaderFavoriteEpisodes": "Yndispartar",
     "LabelIpAddressValue": "IP-atsetur: {0}",
-    "AuthenticationSucceededWithUserName": "{0} varð samgildur",
+    "AuthenticationSucceededWithUserName": "{0} var samgildur",
     "HeaderFavoriteShows": "Yndisrøðir",
     "HeaderLiveTV": "Beinleiðis sjónvarp",
     "HearingImpaired": "Hoyrnarveik",
@@ -55,8 +55,8 @@
     "TaskUpdatePluginsDescription": "Niðurtekur og innleggur dagføringar til ískoytisforrit ið eru stillaði til at dagførast sjálvvirkandi.",
     "TaskCleanTranscodeDescription": "Strikar umkotaðar fílar ið eru eldri enn 1 dag.",
     "TaskOptimizeDatabase": "Albøt dátugrunn",
-    "NameSeasonNumber": "Sesong {0}",
-    "NameSeasonUnknown": "Ókend sesong",
+    "NameSeasonNumber": "Umfar {0}",
+    "NameSeasonUnknown": "Ókent umfar",
     "ScheduledTaskFailedWithName": "{0} miseydnaðist",
     "Undefined": "Óskilmarkað",
     "TasksMaintenanceCategory": "Viðlíkahald",
@@ -68,7 +68,7 @@
     "NotificationOptionServerRestartRequired": "Tørvur er á ambætaraendurbyrjan",
     "TasksApplicationCategory": "Nýtsluskipan",
     "NotificationOptionApplicationUpdateAvailable": "Skipanardagføring er tøk",
-    "NotificationOptionApplicationUpdateInstalled": "Skipanardagføring varð innløgd",
+    "NotificationOptionApplicationUpdateInstalled": "Skipanardagføring var innløgd",
     "UserStoppedPlayingItemWithValues": "{0} er liðugur at spæla {1} á {2}",
     "HomeVideos": "Heimaupptøkur",
     "StartupEmbyServerIsLoading": "Jellyfin-ambætarin er undir byrjanarinnlesing. Vinaliga royn aftur um eitt bil.",
@@ -111,5 +111,15 @@
     "NameExtraNumbered": "{0} {1}",
     "NameExtraFeaturette": "Stuttur heimildarfilmur",
     "TaskAudioNormalization": "Ljóðjavnan",
-    "TaskAudioNormalizationDescription": "Kannar fílur fyri dátum til ljóðjavnan."
+    "TaskAudioNormalizationDescription": "Kannar fílur fyri dátum til ljóðjavnan.",
+    "NameExtraSample": "Kut",
+    "TaskRefreshTrickplayImages": "Framleið Trickplay-myndir",
+    "TaskRefreshTrickplayImagesDescription": "Framleiðir trickplay-myndir fyri kykmyndir í søvnunm har tað er virkt.",
+    "TaskMoveTrickplayImages": "Flyt Trickplay-myndagoymslustað",
+    "TaskMoveTrickplayImagesDescription": "Flytur verandi trickplay-fílur sambært savnsstillingunum.",
+    "NameExtraThemeVideo": "Eyðkenniskykmynd",
+    "NameExtraDeletedScene": "Úrtikin mynd",
+    "NameExtraScene": "Mynd (scena)",
+    "NameExtraUnknown": "Eykatilfar",
+    "Original": "Upprunalig(t/ur)"
 }

Emby.Server.Implementations/Localization/Core/gl.json

@@ -107,5 +107,19 @@
     "TaskAudioNormalizationDescription": "Escanea ficheiros á procura de datos de normalización de volume.",
     "CleanupUserDataTask": "Tarefa de limpeza de datos dos usuarios",
     "CleanupUserDataTaskDescription": "Limpa todos os datos do usuario (estado de visualización, de favorito etc.) dos medios ausentes polo menos 90 días.",
-    "Original": "Orixinal"
+    "Original": "Orixinal",
+    "LyricDownloadFailureFromForItem": "Non se puideron descargar as letras desde {0} para {1}",
+    "NameExtraBehindTheScenes": "Detrás das Cámaras",
+    "NameExtraClip": "Clip",
+    "NameExtraDeletedScene": "Escena Eliminada",
+    "NameExtraFeaturette": "Reportaxe especial",
+    "NameExtraInterview": "Entrevista",
+    "NameExtraNumbered": "{0} {1}",
+    "NameExtraSample": "Mostra",
+    "NameExtraScene": "Escena",
+    "NameExtraShort": "Curtametraxe",
+    "NameExtraThemeSong": "Canción principal",
+    "NameExtraThemeVideo": "Vídeo da canción principal",
+    "NameExtraTrailer": "Tráiler",
+    "NameExtraUnknown": "Extra"
 }

Emby.Server.Implementations/Localization/Core/he.json

@@ -108,5 +108,12 @@
     "CleanupUserDataTaskDescription": "ניקוי כל המידע של המשתמש (מצב צפייה, מועדפים וכו) ממדיה שאינה קיימת מעל 90 יום.",
     "CleanupUserDataTask": "משימת ניקוי מידע משתמש",
     "LyricDownloadFailureFromForItem": "הורדת המילים מ-{0} עבור {1} נכשלה",
-    "Original": "מקור"
+    "Original": "מקור",
+    "NameExtraBehindTheScenes": "מאחורי הקלעים",
+    "NameExtraClip": "קליפ",
+    "NameExtraDeletedScene": "סצנה שנמחקה",
+    "NameExtraFeaturette": "סרט קצר",
+    "NameExtraInterview": "ריאיון",
+    "NameExtraSample": "דגימה",
+    "NameExtraScene": "סצנה"
 }

Emby.Server.Implementations/Localization/Core/hi.json

@@ -106,5 +106,20 @@
     "TaskMoveTrickplayImages": "ट्रिकप्ले छवि स्थान माइग्रेट करें",
     "TaskMoveTrickplayImagesDescription": "लाइब्रेरी सेटिंग्स के अनुसार मौजूदा ट्रिकप्ले फ़ाइलों को स्थानांतरित करता है।",
     "CleanupUserDataTask": "यूज़र डेटा सफाई कार्य",
-    "Original": "असली"
+    "Original": "असली",
+    "LyricDownloadFailureFromForItem": "{0} के लिए {1} से बोल (Lyrics) डाउनलोड करने में विफल रहा",
+    "NameExtraBehindTheScenes": "परदे के पीछे",
+    "NameExtraClip": "क्लिप",
+    "NameExtraDeletedScene": "हटाया गया दृश्य",
+    "NameExtraFeaturette": "फीचरेट",
+    "NameExtraInterview": "साक्षात्कार",
+    "NameExtraNumbered": "{0} {1}",
+    "NameExtraSample": "नमूना",
+    "NameExtraScene": "दृश्य",
+    "NameExtraShort": "शॉर्ट",
+    "NameExtraThemeSong": "थीम सॉन्ग",
+    "NameExtraThemeVideo": "थीम वीडियो",
+    "NameExtraTrailer": "ट्रेलर",
+    "NameExtraUnknown": "अतिरिक्त",
+    "CleanupUserDataTaskDescription": "कम से कम 90 दिनों से अनुपस्थित मीडिया से सभी उपयोगकर्ता डेटा (देखने की स्थिति, पसंदीदा स्थिति आदि) को साफ़ करता है।"
 }

Emby.Server.Implementations/Localization/Core/hu.json

@@ -120,5 +120,6 @@
     "NameExtraThemeSong": "Főcímdal",
     "NameExtraThemeVideo": "Főcímvideó",
     "NameExtraTrailer": "Előzetes",
-    "NameExtraUnknown": "Extra"
+    "NameExtraUnknown": "Extra",
+    "NameExtraNumbered": "{0} {1}"
 }

Emby.Server.Implementations/Localization/Core/hy.json

@@ -24,5 +24,10 @@
     "TaskDownloadMissingSubtitles": "Ներբեռնել պակասող ենթագրերը",
     "AppDeviceValues": "Հավելված` {0}, Սարք `{1}",
     "ChapterNameValue": "Գլուխ {0}",
-    "Collections": "Հավաքածուներ"
+    "Collections": "Հավաքածուներ",
+    "Artists": "Երաժիշտներ",
+    "Default": "Լռելյայն",
+    "Favorites": "Ընտրյալ",
+    "Forced": "Ստիպուած",
+    "Genres": "Ոճ"
 }

Emby.Server.Implementations/Localization/Core/it.json

@@ -118,5 +118,8 @@
     "NameExtraSample": "Campione",
     "NameExtraShort": "Corto",
     "NameExtraThemeSong": "Sigla musicale",
-    "NameExtraTrailer": "Trailer"
+    "NameExtraTrailer": "Trailer",
+    "NameExtraFeaturette": "Caratteristica",
+    "NameExtraThemeVideo": "Video tematico",
+    "NameExtraUnknown": "Extra"
 }

Emby.Server.Implementations/Localization/Core/lt-LT.json

@@ -59,8 +59,8 @@
     "UserOfflineFromDevice": "{0} buvo atjungtas nuo {1}",
     "UserOnlineFromDevice": "{0} prisijungęs iš {1}",
     "UserPasswordChangedWithName": "Slaptažodis pakeistas naudotojui {0}",
-    "UserStartedPlayingItemWithValues": "{0} leidžia {1} į {2}",
-    "UserStoppedPlayingItemWithValues": "{0} baigė leisti {1} į {2}",
+    "UserStartedPlayingItemWithValues": "{0} atkuriama {1} į {2}",
+    "UserStoppedPlayingItemWithValues": "{0} baigė atkūrimą {1} į {2}",
     "VersionNumber": "Versija {0}",
     "TaskUpdatePluginsDescription": "Atsisiunčia ir įdiegia įskiepių, kurie sukonfigūruoti atnaujinti automatiškai, naujinius.",
     "TaskUpdatePlugins": "Atnaujinti įskieius",
@@ -87,7 +87,7 @@
     "TaskCleanActivityLog": "Išvalyti veiklos žurnalą",
     "Undefined": "Neapibrėžtas",
     "Forced": "Priverstinis",
-    "Default": "Numatytas",
+    "Default": "Numatytasis",
     "TaskCleanActivityLogDescription": "Ištrina senesnius nei nustatytas amžius veiklos žurnalo įrašus.",
     "TaskOptimizeDatabase": "Optimizuoti duomenų bazę",
     "TaskKeyframeExtractorDescription": "Iš vaizdo įrašo paruošia reikšminius kadrus, kad būtų sukuriamas tikslenis HLS grojaraštis. Šios užduoties vykdymas gali ilgai užtrukti.",

Emby.Server.Implementations/Localization/Core/ms.json

@@ -106,5 +106,11 @@
     "TaskAudioNormalization": "Normalisasi Audio",
     "TaskAudioNormalizationDescription": "Mengimbas fail-fail untuk data normalisasi audio.",
     "CleanupUserDataTaskDescription": "Membersihkan semua data pengguna (keadaan tontonan, status kegemaran, dan sebagainya) daripada media yang tidak lagi wujud sekurang-kurangnya selama 90 hari.",
-    "CleanupUserDataTask": "Tugas pembersihan data pengguna"
+    "CleanupUserDataTask": "Tugas pembersihan data pengguna",
+    "LyricDownloadFailureFromForItem": "Lirik gagal dimuat turun dari {0} untuk {1}",
+    "NameExtraBehindTheScenes": "Di Sebalik Takbir",
+    "NameExtraClip": "Klip",
+    "NameExtraInterview": "Temu bual",
+    "NameExtraThemeSong": "Lagu Tema",
+    "NameExtraThemeVideo": "Video Tema"
 }

Emby.Server.Implementations/Localization/Core/pt-BR.json

@@ -120,5 +120,6 @@
     "NameExtraThemeVideo": "Vídeo de Abertura",
     "NameExtraTrailer": "Trailer",
     "NameExtraUnknown": "Extra",
-    "NameExtraFeaturette": "Nos Bastidores"
+    "NameExtraFeaturette": "Nos Bastidores",
+    "NameExtraInterview": "Entrevista"
 }

Emby.Server.Implementations/Localization/Core/pt-PT.json

@@ -5,108 +5,121 @@
     "Books": "Livros",
     "ChapterNameValue": "Capítulo {0}",
     "Collections": "Coleções",
-    "FailedLoginAttemptWithUserName": "Tentativa de login falhada a partir de {0}",
+    "FailedLoginAttemptWithUserName": "Tentativa falhada de início de sessão do utilizador {0}",
     "Favorites": "Favoritos",
     "Folders": "Pastas",
     "Genres": "Géneros",
     "HeaderContinueWatching": "Continuar a ver",
-    "HeaderFavoriteEpisodes": "Episódios Favoritos",
-    "HeaderFavoriteShows": "Séries Favoritas",
-    "HeaderLiveTV": "TV em Direto",
-    "HeaderNextUp": "A Seguir",
-    "HomeVideos": "Vídeos Caseiros",
+    "HeaderFavoriteEpisodes": "Episódios favoritos",
+    "HeaderFavoriteShows": "Séries favoritas",
+    "HeaderLiveTV": "TV em direto",
+    "HeaderNextUp": "A seguir",
+    "HomeVideos": "Vídeos caseiros",
     "Inherit": "Herdar",
     "LabelIpAddressValue": "Endereço IP: {0}",
     "LabelRunningTimeValue": "Duração: {0}",
-    "Latest": "Mais Recente",
-    "MixedContent": "Conteúdo Misto",
+    "Latest": "Mais recente",
+    "MixedContent": "Conteúdo misto",
     "Movies": "Filmes",
     "Music": "Música",
     "MusicVideos": "Videoclipes",
-    "NameInstallFailed": "{0} falha na instalação",
+    "NameInstallFailed": "Falha na instalação de {0}",
     "NameSeasonNumber": "Temporada {0}",
-    "NameSeasonUnknown": "Temporada Desconhecida",
+    "NameSeasonUnknown": "Temporada desconhecida",
     "NewVersionIsAvailable": "Está disponível para transferência uma nova versão do servidor Jellyfin.",
     "NotificationOptionApplicationUpdateAvailable": "Atualização de aplicação disponível",
     "NotificationOptionApplicationUpdateInstalled": "Atualização de aplicação instalada",
-    "NotificationOptionAudioPlayback": "Reprodução Iniciada",
-    "NotificationOptionAudioPlaybackStopped": "Reprodução Parada",
+    "NotificationOptionAudioPlayback": "Reprodução de áudio iniciada",
+    "NotificationOptionAudioPlaybackStopped": "Reprodução de áudio interrompida",
     "NotificationOptionCameraImageUploaded": "Imagem da câmara enviada",
     "NotificationOptionInstallationFailed": "Falha na instalação",
     "NotificationOptionNewLibraryContent": "Novo conteúdo adicionado",
-    "NotificationOptionPluginError": "Falha na extensão",
-    "NotificationOptionPluginInstalled": "Extensão instalada",
-    "NotificationOptionPluginUninstalled": "Extensão desinstalada",
-    "NotificationOptionPluginUpdateInstalled": "Extensão atualizada",
+    "NotificationOptionPluginError": "Falha no plugin",
+    "NotificationOptionPluginInstalled": "Plugin instalado",
+    "NotificationOptionPluginUninstalled": "Plugin desinstalado",
+    "NotificationOptionPluginUpdateInstalled": "Atualização de plugin instalada",
     "NotificationOptionServerRestartRequired": "Necessário reiniciar o servidor",
     "NotificationOptionTaskFailed": "Falha em tarefa agendada",
     "NotificationOptionUserLockedOut": "Utilizador bloqueado",
-    "NotificationOptionVideoPlayback": "Reprodução do vídeo iniciada",
-    "NotificationOptionVideoPlaybackStopped": "Reprodução do vídeo parada",
+    "NotificationOptionVideoPlayback": "Reprodução de vídeo iniciada",
+    "NotificationOptionVideoPlaybackStopped": "Reprodução de vídeo interrompida",
     "Photos": "Fotografias",
     "PluginInstalledWithName": "{0} foi instalado",
     "PluginUninstalledWithName": "{0} foi desinstalado",
     "PluginUpdatedWithName": "{0} foi atualizado",
     "ScheduledTaskFailedWithName": "{0} falhou",
     "Shows": "Séries",
-    "StartupEmbyServerIsLoading": "O servidor Jellyfin está a iniciar. Tente novamente mais tarde.",
-    "SubtitleDownloadFailureFromForItem": "Falha na transferência de legendas a partir de {0} para {1}",
-    "TvShows": "Séries",
+    "StartupEmbyServerIsLoading": "O servidor Jellyfin está a iniciar. Tenta novamente dentro de instantes.",
+    "SubtitleDownloadFailureFromForItem": "Falha ao transferir legendas de {0} para {1}",
+    "TvShows": "Séries de TV",
     "UserCreatedWithName": "Utilizador {0} criado",
-    "UserDeletedWithName": "Utilizador {0} apagado",
+    "UserDeletedWithName": "Utilizador {0} eliminado",
     "UserDownloadingItemWithValues": "{0} está a transferir {1}",
     "UserLockedOutWithName": "Utilizador {0} bloqueado",
-    "UserOfflineFromDevice": "{0} desligou-se a partir de {1}",
-    "UserOnlineFromDevice": "{0} ligou-se a partir de {1}",
+    "UserOfflineFromDevice": "{0} desligou-se de {1}",
+    "UserOnlineFromDevice": "{0} está online em {1}",
     "UserPasswordChangedWithName": "Palavra-passe alterada para o utilizador {0}",
     "UserStartedPlayingItemWithValues": "{0} está a reproduzir {1} em {2}",
     "UserStoppedPlayingItemWithValues": "{0} terminou a reprodução de {1} em {2}",
     "VersionNumber": "Versão {0}",
-    "TaskDownloadMissingSubtitlesDescription": "Procurar na internet por legendas em falta baseado na configuração de metadados.",
+    "TaskDownloadMissingSubtitlesDescription": "Procura na Internet legendas em falta com base na configuração dos metadados.",
     "TaskDownloadMissingSubtitles": "Transferir legendas em falta",
-    "TaskRefreshChannelsDescription": "Atualizar informação sobre canais da Internet.",
-    "TaskRefreshChannels": "Atualizar Canais",
-    "TaskCleanTranscodeDescription": "Apagar ficheiros de transcode com mais de um dia.",
-    "TaskCleanTranscode": "Limpar a Diretoria de Transcode",
-    "TaskUpdatePluginsDescription": "Faz o download e instala updates para os plugins que estão configurados para atualizar automaticamente.",
-    "TaskUpdatePlugins": "Atualizar Plugins",
-    "TaskRefreshPeopleDescription": "Atualizar metadados para elenco e equipa técnica da tua mediateca.",
-    "TaskRefreshPeople": "Atualizar Pessoas",
-    "TaskCleanLogsDescription": "Apagar ficheiros de log que têm mais de {0} dias.",
-    "TaskCleanLogs": "Limpar a Diretoria de Logs",
-    "TaskRefreshLibraryDescription": "Analisar a mediateca para novos ficheiros e atualizar os metadados.",
-    "TaskRefreshLibrary": "Analisar mediateca",
-    "TaskRefreshChapterImagesDescription": "Criar thumbnails para os vídeos que têm capítulos.",
-    "TaskRefreshChapterImages": "Extrair Imagens dos Capítulos",
-    "TaskCleanCacheDescription": "Apagar ficheiros em cache que já não são necessários.",
-    "TaskCleanCache": "Limpar Cache",
+    "TaskRefreshChannelsDescription": "Atualiza as informações dos canais da Internet.",
+    "TaskRefreshChannels": "Atualizar canais",
+    "TaskCleanTranscodeDescription": "Elimina ficheiros de transcodificação com mais de um dia.",
+    "TaskCleanTranscode": "Limpar pasta de transcodificação",
+    "TaskUpdatePluginsDescription": "Transfere e instala atualizações dos plugins configurados para atualização automática.",
+    "TaskUpdatePlugins": "Atualizar plugins",
+    "TaskRefreshPeopleDescription": "Atualiza os metadados de atores e realizadores na tua biblioteca multimédia.",
+    "TaskRefreshPeople": "Atualizar pessoas",
+    "TaskCleanLogsDescription": "Elimina ficheiros de registo com mais de {0} dias.",
+    "TaskCleanLogs": "Limpar pasta de registos",
+    "TaskRefreshLibraryDescription": "Analisa a biblioteca multimédia à procura de novos ficheiros e atualiza os metadados.",
+    "TaskRefreshLibrary": "Analisar biblioteca multimédia",
+    "TaskRefreshChapterImagesDescription": "Cria miniaturas para vídeos que têm capítulos.",
+    "TaskRefreshChapterImages": "Extrair imagens dos capítulos",
+    "TaskCleanCacheDescription": "Elimina ficheiros de cache que já não são necessários ao sistema.",
+    "TaskCleanCache": "Limpar pasta de cache",
     "TasksChannelsCategory": "Canais da Internet",
     "TasksApplicationCategory": "Aplicação",
-    "TasksLibraryCategory": "Mediateca",
+    "TasksLibraryCategory": "Biblioteca",
     "TasksMaintenanceCategory": "Manutenção",
-    "TaskCleanActivityLogDescription": "Apaga as entradas do registo de atividade anteriores à data configurada.",
+    "TaskCleanActivityLogDescription": "Elimina as entradas do registo de atividade mais antigas do que o período configurado.",
     "TaskCleanActivityLog": "Limpar registo de atividade",
     "Undefined": "Indefinido",
     "Forced": "Forçado",
     "Default": "Predefinição",
-    "TaskOptimizeDatabaseDescription": "Otimiza e liberta espaço livre na base de dados. A execução desta tarefa depois de analisar a mediateca ou efetuar outras alterações que impliquem modificações na base de dados pode melhorar o desempenho.",
+    "TaskOptimizeDatabaseDescription": "Compacta a base de dados e liberta espaço não utilizado. A execução desta tarefa depois de analisar a biblioteca ou de outras alterações que modifiquem a base de dados pode melhorar o desempenho.",
     "TaskOptimizeDatabase": "Otimizar base de dados",
-    "TaskKeyframeExtractorDescription": "Extrai quadros-chave de ficheiros de video para criar listas de reprodução HLS mais precisas. Esta tarefa pode demorar algum tempo.",
-    "TaskKeyframeExtractor": "Extrator de Quadros-chave",
+    "TaskKeyframeExtractorDescription": "Extrai fotogramas-chave de ficheiros de vídeo para criar playlists HLS mais precisas. Esta tarefa pode demorar algum tempo.",
+    "TaskKeyframeExtractor": "Extrator de fotogramas-chave",
     "External": "Externo",
-    "HearingImpaired": "Surdo",
+    "HearingImpaired": "Deficiência auditiva",
     "TaskRefreshTrickplayImages": "Gerar imagens de trickplay",
     "TaskRefreshTrickplayImagesDescription": "Cria pré-visualizações de trickplay para vídeos nas bibliotecas ativadas.",
     "TaskAudioNormalizationDescription": "Analisa os ficheiros para obter dados de normalização de áudio.",
     "TaskAudioNormalization": "Normalização de áudio",
-    "TaskExtractMediaSegments": "Analisar segmentos de multimédia",
-    "TaskDownloadMissingLyrics": "Transferir letra em falta",
-    "TaskMoveTrickplayImages": "Migrar a localização da imagem do Trickplay",
-    "TaskDownloadMissingLyricsDescription": "Transferir letra para músicas",
-    "TaskExtractMediaSegmentsDescription": "Extrai ou obtém segmentos de multimédia a partir de plugins com suporte para MediaSegment.",
-    "TaskMoveTrickplayImagesDescription": "Move os ficheiros trickplay existentes de acordo com as definições da mediateca.",
-    "CleanupUserDataTaskDescription": "Apaga todos os dados de utilizador (estados de reprodução, favoritos, etc) de arquivos média não presentes há 90 dias ou mais.",
+    "TaskExtractMediaSegments": "Analisar segmentos multimédia",
+    "TaskDownloadMissingLyrics": "Transferir letras em falta",
+    "TaskMoveTrickplayImages": "Migrar localização das imagens de trickplay",
+    "TaskDownloadMissingLyricsDescription": "Transfere letras de músicas",
+    "TaskExtractMediaSegmentsDescription": "Extrai ou obtém segmentos multimédia de plugins com MediaSegment ativado.",
+    "TaskMoveTrickplayImagesDescription": "Move os ficheiros de trickplay existentes de acordo com as definições da biblioteca.",
+    "CleanupUserDataTaskDescription": "Remove todos os dados de utilizador (estado de reprodução, estado de favorito, etc.) de conteúdos multimédia que já não estejam presentes há pelo menos 90 dias.",
     "CleanupUserDataTask": "Limpeza de dados de utilizador",
     "Original": "Original",
-    "LyricDownloadFailureFromForItem": "Erro ao descarregar letras de {0} para {1}"
+    "LyricDownloadFailureFromForItem": "Falha ao transferir letras de {0} para {1}",
+    "NameExtraDeletedScene": "Cena eliminada",
+    "NameExtraInterview": "Entrevista",
+    "NameExtraUnknown": "Extra",
+    "NameExtraBehindTheScenes": "Bastidores",
+    "NameExtraSample": "Amostra",
+    "NameExtraScene": "Cena",
+    "NameExtraClip": "Excerto",
+    "NameExtraFeaturette": "Minidocumentário",
+    "NameExtraThemeSong": "Tema musical",
+    "NameExtraThemeVideo": "Vídeo temático",
+    "NameExtraShort": "Curta-metragem",
+    "NameExtraNumbered": "{0} {1}",
+    "NameExtraTrailer": "Trailer"
 }

Emby.Server.Implementations/Localization/Core/pt.json

@@ -1,124 +1,125 @@
 {
-    "HeaderLiveTV": "TV Em Direto",
+    "HeaderLiveTV": "TV em direto",
     "Collections": "Coleções",
     "Books": "Livros",
     "Artists": "Artistas",
-    "HeaderNextUp": "A Seguir",
-    "HeaderFavoriteEpisodes": "Episódios Favoritos",
-    "HeaderFavoriteShows": "Séries Favoritas",
+    "HeaderNextUp": "A seguir",
+    "HeaderFavoriteEpisodes": "Episódios favoritos",
+    "HeaderFavoriteShows": "Séries favoritas",
     "HeaderContinueWatching": "Continuar a ver",
     "Genres": "Géneros",
     "Folders": "Pastas",
     "Favorites": "Favoritos",
-    "UserDownloadingItemWithValues": "{0} está sendo baixado {1}",
+    "UserDownloadingItemWithValues": "{0} está a transferir {1}",
     "VersionNumber": "Versão {0}",
     "UserStoppedPlayingItemWithValues": "{0} terminou a reprodução de {1} em {2}",
-    "UserStartedPlayingItemWithValues": "{0} está reproduzindo {1} em {2}",
-    "UserPasswordChangedWithName": "A senha do usuário {0} foi alterada",
-    "UserOnlineFromDevice": "{0} está online a partir de {1}",
-    "UserOfflineFromDevice": "{0} desconectou-se a partir de {1}",
-    "UserLockedOutWithName": "O usuário {0} foi bloqueado",
-    "UserDeletedWithName": "O usuário {0} foi removido",
-    "UserCreatedWithName": "O usuário {0} foi criado",
-    "TvShows": "Séries",
-    "SubtitleDownloadFailureFromForItem": "Falha na transferência de legendas de {0} para {1}",
-    "StartupEmbyServerIsLoading": "O servidor Jellyfin está iniciando. Tente novamente dentro de momentos.",
+    "UserStartedPlayingItemWithValues": "{0} está a reproduzir {1} em {2}",
+    "UserPasswordChangedWithName": "Palavra-passe alterada para o utilizador {0}",
+    "UserOnlineFromDevice": "{0} está online em {1}",
+    "UserOfflineFromDevice": "{0} desligou-se de {1}",
+    "UserLockedOutWithName": "Utilizador {0} bloqueado",
+    "UserDeletedWithName": "Utilizador {0} eliminado",
+    "UserCreatedWithName": "Utilizador {0} criado",
+    "TvShows": "Séries de TV",
+    "SubtitleDownloadFailureFromForItem": "Falha ao transferir legendas de {0} para {1}",
+    "StartupEmbyServerIsLoading": "O servidor Jellyfin está a iniciar. Tenta novamente dentro de instantes.",
     "ScheduledTaskFailedWithName": "{0} falhou",
     "PluginUpdatedWithName": "{0} foi atualizado",
     "PluginUninstalledWithName": "{0} foi desinstalado",
     "PluginInstalledWithName": "{0} foi instalado",
-    "NotificationOptionVideoPlaybackStopped": "Reprodução de vídeo parada",
+    "NotificationOptionVideoPlaybackStopped": "Reprodução de vídeo interrompida",
     "NotificationOptionVideoPlayback": "Reprodução de vídeo iniciada",
-    "NotificationOptionUserLockedOut": "Usuário bloqueado",
-    "NotificationOptionTaskFailed": "Falha na tarefa agendada",
-    "NotificationOptionServerRestartRequired": "É necessário reiniciar o servidor",
-    "NotificationOptionPluginUpdateInstalled": "Plugin atualizado",
+    "NotificationOptionUserLockedOut": "Utilizador bloqueado",
+    "NotificationOptionTaskFailed": "Falha em tarefa agendada",
+    "NotificationOptionServerRestartRequired": "Necessário reiniciar o servidor",
+    "NotificationOptionPluginUpdateInstalled": "Atualização de plugin instalada",
     "NotificationOptionPluginUninstalled": "Plugin desinstalado",
     "NotificationOptionPluginInstalled": "Plugin instalado",
     "NotificationOptionPluginError": "Falha no plugin",
     "NotificationOptionNewLibraryContent": "Novo conteúdo adicionado",
-    "NotificationOptionInstallationFailed": "Falha de instalação",
-    "NotificationOptionCameraImageUploaded": "Imagem de câmera enviada",
-    "NotificationOptionAudioPlaybackStopped": "Reprodução Parada",
-    "NotificationOptionAudioPlayback": "Reprodução Iniciada",
-    "NotificationOptionApplicationUpdateInstalled": "A atualização do aplicativo foi instalada",
-    "NotificationOptionApplicationUpdateAvailable": "Uma atualização do aplicativo está disponível",
-    "NewVersionIsAvailable": "Uma nova versão do servidor Jellyfin está disponível para download.",
-    "NameSeasonUnknown": "Temporada Desconhecida",
+    "NotificationOptionInstallationFailed": "Falha na instalação",
+    "NotificationOptionCameraImageUploaded": "Imagem da câmara enviada",
+    "NotificationOptionAudioPlaybackStopped": "Reprodução de áudio interrompida",
+    "NotificationOptionAudioPlayback": "Reprodução de áudio iniciada",
+    "NotificationOptionApplicationUpdateInstalled": "Atualização de aplicação instalada",
+    "NotificationOptionApplicationUpdateAvailable": "Atualização de aplicação disponível",
+    "NewVersionIsAvailable": "Está disponível para transferência uma nova versão do servidor Jellyfin.",
+    "NameSeasonUnknown": "Temporada desconhecida",
     "NameSeasonNumber": "Temporada {0}",
     "NameInstallFailed": "Falha na instalação de {0}",
     "MusicVideos": "Videoclipes",
     "Music": "Música",
-    "MixedContent": "Conteúdo diverso",
-    "Latest": "Mais Recente",
+    "MixedContent": "Conteúdo misto",
+    "Latest": "Mais recente",
     "LabelRunningTimeValue": "Duração: {0}",
-    "LabelIpAddressValue": "Endereço de IP: {0}",
+    "LabelIpAddressValue": "Endereço IP: {0}",
     "Inherit": "Herdar",
-    "HomeVideos": "Vídeos Caseiros",
+    "HomeVideos": "Vídeos caseiros",
     "Shows": "Séries",
     "Photos": "Fotografias",
     "Movies": "Filmes",
-    "FailedLoginAttemptWithUserName": "Tentativa de início de sessão falhada a partir de {0}",
+    "FailedLoginAttemptWithUserName": "Tentativa falhada de início de sessão do utilizador {0}",
     "ChapterNameValue": "Capítulo {0}",
     "AuthenticationSucceededWithUserName": "{0} autenticado com sucesso",
     "AppDeviceValues": "Aplicação: {0}, Dispositivo: {1}",
-    "TaskCleanCache": "Limpar Diretório de Cache",
+    "TaskCleanCache": "Limpar pasta de cache",
     "TasksApplicationCategory": "Aplicação",
-    "TasksLibraryCategory": "Mediateca",
+    "TasksLibraryCategory": "Biblioteca",
     "TasksMaintenanceCategory": "Manutenção",
-    "TaskRefreshChannels": "Atualizar Canais",
-    "TaskUpdatePlugins": "Atualizar Plugins",
-    "TaskCleanLogsDescription": "Deletar arquivos de log que existe a mais de {0} dias.",
-    "TaskCleanLogs": "Limpar diretório de logs",
-    "TaskRefreshLibrary": "Analisar mediateca",
+    "TaskRefreshChannels": "Atualizar canais",
+    "TaskUpdatePlugins": "Atualizar plugins",
+    "TaskCleanLogsDescription": "Elimina ficheiros de registo com mais de {0} dias.",
+    "TaskCleanLogs": "Limpar pasta de registos",
+    "TaskRefreshLibrary": "Analisar biblioteca multimédia",
     "TaskRefreshChapterImagesDescription": "Cria miniaturas para vídeos que têm capítulos.",
-    "TaskCleanCacheDescription": "Apaga ficheiros em cache que já não são usados pelo sistema.",
-    "TasksChannelsCategory": "Canais de Internet",
-    "TaskRefreshChapterImages": "Extrair Imagens do Capítulo",
-    "TaskDownloadMissingSubtitlesDescription": "Pesquisa na Internet as legendas em falta com base na configuração de metadados.",
+    "TaskCleanCacheDescription": "Elimina ficheiros de cache que já não são necessários ao sistema.",
+    "TasksChannelsCategory": "Canais da Internet",
+    "TaskRefreshChapterImages": "Extrair imagens dos capítulos",
+    "TaskDownloadMissingSubtitlesDescription": "Procura na Internet legendas em falta com base na configuração dos metadados.",
     "TaskDownloadMissingSubtitles": "Transferir legendas em falta",
-    "TaskRefreshChannelsDescription": "Atualiza as informações do canal da Internet.",
-    "TaskCleanTranscodeDescription": "Apagar os ficheiros com mais de um dia, de Transcode.",
-    "TaskCleanTranscode": "Limpar o diretório de Transcode",
-    "TaskUpdatePluginsDescription": "Baixa e instala as atualizações para plug-ins configurados para atualização automática.",
-    "TaskRefreshPeopleDescription": "Atualizar metadados para elenco e equipa técnica da tua mediateca.",
+    "TaskRefreshChannelsDescription": "Atualiza as informações dos canais da Internet.",
+    "TaskCleanTranscodeDescription": "Elimina ficheiros de transcodificação com mais de um dia.",
+    "TaskCleanTranscode": "Limpar pasta de transcodificação",
+    "TaskUpdatePluginsDescription": "Transfere e instala atualizações dos plugins configurados para atualização automática.",
+    "TaskRefreshPeopleDescription": "Atualiza os metadados de atores e realizadores na tua biblioteca multimédia.",
     "TaskRefreshPeople": "Atualizar pessoas",
-    "TaskRefreshLibraryDescription": "Analisar a mediateca para novos ficheiros e atualizar os metadados.",
-    "TaskCleanActivityLog": "Limpar registro de atividade",
+    "TaskRefreshLibraryDescription": "Analisa a biblioteca multimédia à procura de novos ficheiros e atualiza os metadados.",
+    "TaskCleanActivityLog": "Limpar registo de atividade",
     "Undefined": "Indefinido",
     "Forced": "Forçado",
     "Default": "Predefinição",
-    "TaskCleanActivityLogDescription": "Apaga itens no registro com idade acima do que é configurado.",
+    "TaskCleanActivityLogDescription": "Elimina as entradas do registo de atividade mais antigas do que o período configurado.",
     "TaskOptimizeDatabase": "Otimizar base de dados",
-    "TaskOptimizeDatabaseDescription": "Otimiza e liberta espaço livre na base de dados. A execução desta tarefa depois de analisar a mediateca ou efetuar outras alterações que impliquem modificações na base de dados pode melhorar o desempenho.",
+    "TaskOptimizeDatabaseDescription": "Compacta a base de dados e liberta espaço não utilizado. A execução desta tarefa depois de analisar a biblioteca ou de outras alterações que modifiquem a base de dados pode melhorar o desempenho.",
     "External": "Externo",
-    "HearingImpaired": "Problemas auditivos",
-    "TaskKeyframeExtractor": "Extrator de quadro-chave",
-    "TaskKeyframeExtractorDescription": "Retira frames chave do video para criar listas HLS precisas. Esta tarefa pode correr durante algum tempo.",
-    "TaskRefreshTrickplayImages": "Gerar imagens de Trickplay",
-    "TaskRefreshTrickplayImagesDescription": "Cria miniaturas de pré-visualização (Trickplay) para vídeos nas bibliotecas ativadas.",
+    "HearingImpaired": "Deficiência auditiva",
+    "TaskKeyframeExtractor": "Extrator de fotogramas-chave",
+    "TaskKeyframeExtractorDescription": "Extrai fotogramas-chave de ficheiros de vídeo para criar playlists HLS mais precisas. Esta tarefa pode demorar algum tempo.",
+    "TaskRefreshTrickplayImages": "Gerar imagens de trickplay",
+    "TaskRefreshTrickplayImagesDescription": "Cria pré-visualizações de trickplay para vídeos nas bibliotecas ativadas.",
     "TaskAudioNormalizationDescription": "Analisa os ficheiros para obter dados de normalização de áudio.",
     "TaskAudioNormalization": "Normalização de áudio",
-    "TaskDownloadMissingLyrics": "Transferir letra em falta",
-    "TaskDownloadMissingLyricsDescription": "Transferir letra para músicas",
-    "TaskMoveTrickplayImagesDescription": "Move os ficheiros Trickplay existentes de acordo com as definições da mediateca.",
-    "TaskExtractMediaSegments": "Analisar segmentos de multimédia",
-    "TaskExtractMediaSegmentsDescription": "Extrai ou obtém segmentos de multimédia a partir de plugins com suporte para MediaSegment.",
-    "TaskMoveTrickplayImages": "Migrar a localização das imagens de Trickplay",
-    "CleanupUserDataTask": "Task de limpeza de dados do usuário",
-    "CleanupUserDataTaskDescription": "Remove todos os dados do usuário (progresso, favoritos etc) de mídias que não estão presentes há pelo menos 90 dias.",
+    "TaskDownloadMissingLyrics": "Transferir letras em falta",
+    "TaskDownloadMissingLyricsDescription": "Transfere letras de músicas",
+    "TaskMoveTrickplayImagesDescription": "Move os ficheiros de trickplay existentes de acordo com as definições da biblioteca.",
+    "TaskExtractMediaSegments": "Analisar segmentos multimédia",
+    "TaskExtractMediaSegmentsDescription": "Extrai ou obtém segmentos multimédia de plugins com MediaSegment ativado.",
+    "TaskMoveTrickplayImages": "Migrar localização das imagens de trickplay",
+    "CleanupUserDataTask": "Limpeza de dados de utilizador",
+    "CleanupUserDataTaskDescription": "Remove todos os dados de utilizador (estado de reprodução, estado de favorito, etc.) de conteúdos multimédia que já não estejam presentes há pelo menos 90 dias.",
     "Original": "Original",
-    "LyricDownloadFailureFromForItem": "Erro ao descarregar letras de {0} para {1}",
+    "LyricDownloadFailureFromForItem": "Falha ao transferir letras de {0} para {1}",
     "NameExtraBehindTheScenes": "Bastidores",
-    "NameExtraClip": "Clip",
-    "NameExtraDeletedScene": "Cena Eliminada",
-    "NameExtraFeaturette": "Média-metragem",
+    "NameExtraClip": "Excerto",
+    "NameExtraDeletedScene": "Cena eliminada",
+    "NameExtraFeaturette": "Minidocumentário",
     "NameExtraInterview": "Entrevista",
     "NameExtraSample": "Amostra",
     "NameExtraShort": "Curta-metragem",
-    "NameExtraThemeSong": "Tema Principal",
-    "NameExtraThemeVideo": "Vídeo de Abertura",
+    "NameExtraThemeSong": "Tema musical",
+    "NameExtraThemeVideo": "Vídeo temático",
     "NameExtraScene": "Cena",
     "NameExtraUnknown": "Extra",
-    "NameExtraTrailer": "Trailer"
+    "NameExtraTrailer": "Trailer",
+    "NameExtraNumbered": "{0} {1}"
 }

Emby.Server.Implementations/Localization/Core/ro.json

@@ -108,5 +108,8 @@
     "CleanupUserDataTask": "Sarcina de curatare a datelor utilizatorului",
     "CleanupUserDataTaskDescription": "Sterge toate datele utilizatorului (starea vizionarii, starea favoritelor etc.) de pe suporturile media care nu mai sunt prezente timp de cel puțin 90 de zile.",
     "LyricDownloadFailureFromForItem": "Versurile nu au putut fi descărcate din {0} pentru {1}",
-    "Original": "Original"
+    "Original": "Original",
+    "NameExtraBehindTheScenes": "În culise",
+    "NameExtraClip": "Clip",
+    "NameExtraDeletedScene": "Scenă ștearsă"
 }

Emby.Server.Implementations/Localization/Core/ru.json

@@ -109,7 +109,7 @@
     "CleanupUserDataTaskDescription": "Очищает все пользовательские данные (состояние просмотра, статус избранного и т.д.) с медиа, отсутствующих по меньшей мере в течение 90 дней.",
     "Original": "Оригинальный",
     "LyricDownloadFailureFromForItem": "Не получилось скачать текст песни с {0} для {1}",
-    "NameExtraBehindTheScenes": "За кулисами",
+    "NameExtraBehindTheScenes": "За кадром",
     "NameExtraClip": "Отрывок",
     "NameExtraDeletedScene": "Удалённая сцена",
     "NameExtraFeaturette": "Короткометражка",
@@ -119,5 +119,7 @@
     "NameExtraThemeSong": "Заглавная песня",
     "NameExtraThemeVideo": "Заглавное видео",
     "NameExtraTrailer": "Трейлер",
-    "NameExtraUnknown": "Дополнительный материал"
+    "NameExtraUnknown": "Дополнительный материал",
+    "NameExtraNumbered": "{0} {1}",
+    "NameExtraShort": "Короткометражка"
 }

Emby.Server.Implementations/Localization/Core/sk.json

@@ -91,7 +91,7 @@
     "Default": "Predvolené",
     "TaskOptimizeDatabaseDescription": "Zmenší databázu a odstráni prázdne miesto. Spustenie tejto úlohy po skenovaní knižnice alebo po iných zmenách zahŕňajúcich úpravy databáze môže zlepšiť výkon.",
     "TaskOptimizeDatabase": "Optimalizovať databázu",
-    "TaskKeyframeExtractorDescription": "Extrahuje kľúčové snímky z video súborov na vytvorenie presnejších HLS playlistov. Táto úloha môže trvať dlhšiu dobu.",
+    "TaskKeyframeExtractorDescription": "Extrahuje kľúčové snímky z video súborov na vytvorenie presnejších HLS zoznamov prehrávania. Táto úloha môže trvať dlhšiu dobu.",
     "TaskKeyframeExtractor": "Extraktor kľúčových snímkov",
     "External": "Externé",
     "HearingImpaired": "Sluchovo postihnutí",

Emby.Server.Implementations/Localization/Core/sq.json

@@ -108,5 +108,18 @@
     "CleanupUserDataTaskDescription": "Pastron të gjitha të dhënat e përdorueseve (gjendja e shikimit, statusi i të preferuarave etj.) nga mediat që nuk janë më të pranishme për të paktën 90 ditë.",
     "CleanupUserDataTask": "Veprim për pastrimin të dhënave të përdorueseve",
     "LyricDownloadFailureFromForItem": "Teksti i këngës nuk arriti të shkarkohej nga {0} për {1}",
-    "Original": "Origjinal"
+    "Original": "Origjinal",
+    "NameExtraBehindTheScenes": "Pamje nga prapaskenat",
+    "NameExtraClip": "Pjesë",
+    "NameExtraDeletedScene": "Skenë e fshirë",
+    "NameExtraFeaturette": "Film i shkurtër",
+    "NameExtraInterview": "Intervistë",
+    "NameExtraNumbered": "{0} {1}",
+    "NameExtraSample": "Shembull",
+    "NameExtraScene": "Skenë",
+    "NameExtraShort": "Film i shkurtër",
+    "NameExtraThemeSong": "Kënga e temës",
+    "NameExtraThemeVideo": "Videoja e temës",
+    "NameExtraTrailer": "Parapamje",
+    "NameExtraUnknown": "Shtesë"
 }

Emby.Server.Implementations/Localization/Core/sr.json

@@ -108,5 +108,18 @@
     "TaskMoveTrickplayImages": "Промени локацију сличица за визуелно премотавање",
     "TaskDownloadMissingLyricsDescription": "Преузми стихове песама",
     "LyricDownloadFailureFromForItem": "Није успело преузимање стихова са {0} за {1}",
-    "Original": "Изворно"
+    "Original": "Изворно",
+    "NameExtraBehindTheScenes": "Иза кулиса",
+    "NameExtraClip": "Исечак",
+    "NameExtraDeletedScene": "Обрисана сцена",
+    "NameExtraFeaturette": "Кратки прилог",
+    "NameExtraInterview": "Интервју",
+    "NameExtraNumbered": "{0} {1}",
+    "NameExtraSample": "Узорак",
+    "NameExtraScene": "Сцена",
+    "NameExtraShort": "Кратки филм",
+    "NameExtraThemeSong": "Музичка тема",
+    "NameExtraThemeVideo": "Спот музичке теме",
+    "NameExtraTrailer": "Реклама",
+    "NameExtraUnknown": "Додатак"
 }

Emby.Server.Implementations/Localization/Core/sv.json

@@ -116,5 +116,10 @@
     "NameExtraScene": "Scen",
     "NameExtraShort": "Kortfilm",
     "NameExtraThemeSong": "Signaturmelodi",
-    "NameExtraTrailer": "Trailer"
+    "NameExtraTrailer": "Trailer",
+    "NameExtraClip": "Klipp",
+    "NameExtraFeaturette": "Kortfilm",
+    "NameExtraSample": "Prov",
+    "NameExtraThemeVideo": "Signaturvideo",
+    "NameExtraUnknown": "Extra"
 }

Emby.Server.Implementations/Localization/Core/ta.json

@@ -106,5 +106,20 @@
     "TaskExtractMediaSegments": "மீடியா பிரிவு ஸ்கேன்",
     "TaskExtractMediaSegmentsDescription": "மீடியாசெக்மென்ட் இயக்கப்பட்ட செருகுநிரல்களிலிருந்து மீடியா பிரிவுகளைப் பிரித்தெடுக்கிறது அல்லது பெறுகிறது.",
     "CleanupUserDataTaskDescription": "குறைந்தது 90 நாட்களுக்கு இல்லாத மீடியாவிலிருந்து அனைத்து பயனர் தரவையும் (கண்காணிப்பு நிலை, பிடித்த நிலை போன்றவை) சுத்தம் செய்கிறது.",
-    "CleanupUserDataTask": "பயனர் தரவை சுத்தம் செய்யும் பணி"
+    "CleanupUserDataTask": "பயனர் தரவை சுத்தம் செய்யும் பணி",
+    "LyricDownloadFailureFromForItem": "{0} இலிருந்து {1} க்கு பாடல் வரிகளைப் பதிவிறக்க முடியவில்லை",
+    "NameExtraBehindTheScenes": "திரைக்குப் பின்னால்",
+    "NameExtraClip": "துண்டுக்காட்சி",
+    "NameExtraDeletedScene": "நீக்கப்பட்ட காட்சிகள்",
+    "NameExtraFeaturette": "திரைப்பின்னணித் தொகுப்பு",
+    "NameExtraInterview": "நேர்காணல்",
+    "NameExtraSample": "மாதிரி",
+    "NameExtraScene": "காட்சி",
+    "NameExtraShort": "குறுகிய",
+    "NameExtraThemeSong": "மையப் பாடல்",
+    "NameExtraThemeVideo": "மையக் காணொளி",
+    "NameExtraTrailer": "முன்னோட்டம்",
+    "NameExtraUnknown": "கூடுதல்",
+    "Original": "அசல்",
+    "NameExtraNumbered": "{0} {1}"
 }

Emby.Server.Implementations/Localization/Core/tr.json

@@ -1,5 +1,5 @@
 {
-    "AppDeviceValues": "Uygulama: {0}, Aygıt: {1}",
+    "AppDeviceValues": "Uygulama: {0}, Cihaz: {1}",
     "Artists": "Sanatçılar",
     "AuthenticationSucceededWithUserName": "{0} kimliği başarıyla doğrulandı",
     "Books": "Kitaplar",

Emby.Server.Implementations/Localization/Core/zh-CN.json

@@ -115,11 +115,11 @@
     "NameExtraFeaturette": "花絮",
     "NameExtraInterview": "采访",
     "NameExtraNumbered": "{0} {1}",
-    "NameExtraSample": "样本",
-    "NameExtraScene": "场景",
-    "NameExtraShort": "短片",
+    "NameExtraSample": "试看",
+    "NameExtraScene": "精选片段",
+    "NameExtraShort": "短篇",
     "NameExtraThemeSong": "主题曲",
     "NameExtraThemeVideo": "主题视频",
     "NameExtraTrailer": "预告片",
-    "NameExtraUnknown": "额外"
+    "NameExtraUnknown": "额外内容"
 }

Emby.Server.Implementations/Localization/Core/zh-HK.json

@@ -10,8 +10,8 @@
     "Folders": "資料夾",
     "Genres": "風格",
     "HeaderContinueWatching": "繼續睇返",
-    "HeaderFavoriteEpisodes": "心水嘅劇集",
-    "HeaderFavoriteShows": "心水嘅節目",
+    "HeaderFavoriteEpisodes": "心水劇集",
+    "HeaderFavoriteShows": "心水節目",
     "HeaderLiveTV": "電視直播",
     "HeaderNextUp": "跟住落嚟",
     "HomeVideos": "家庭影片",
@@ -108,5 +108,18 @@
     "CleanupUserDataTask": "清理使用者資料嘅任務",
     "CleanupUserDataTaskDescription": "清理已消失至少 90 日嘅媒體用家數據（包括觀看狀態、心水狀態等）。",
     "LyricDownloadFailureFromForItem": "冇辦法從 {0} 下載 {1} 嘅歌詞",
-    "Original": "原始"
+    "Original": "原始",
+    "NameExtraBehindTheScenes": "幕後花絮",
+    "NameExtraClip": "片段",
+    "NameExtraDeletedScene": "刪減場景",
+    "NameExtraFeaturette": "花絮",
+    "NameExtraInterview": "采訪",
+    "NameExtraNumbered": "{0} {1}",
+    "NameExtraSample": "試看",
+    "NameExtraScene": "精選片段",
+    "NameExtraShort": "短篇",
+    "NameExtraThemeSong": "主題曲",
+    "NameExtraThemeVideo": "主題影片",
+    "NameExtraTrailer": "預告片",
+    "NameExtraUnknown": "額外內容"
 }

Emby.Server.Implementations/Localization/Core/zh-TW.json

@@ -108,5 +108,18 @@
     "CleanupUserDataTask": "用戶資料清理工作",
     "CleanupUserDataTaskDescription": "從用戶資料中清除已被刪除超過 90 天的媒體的相關資料。",
     "Original": "原作",
-    "LyricDownloadFailureFromForItem": "無法從 {0} 下載 {1} 的歌詞"
+    "LyricDownloadFailureFromForItem": "無法從 {0} 下載 {1} 的歌詞",
+    "NameExtraBehindTheScenes": "幕後花絮",
+    "NameExtraClip": "片段",
+    "NameExtraDeletedScene": "刪減場景",
+    "NameExtraFeaturette": "花絮",
+    "NameExtraInterview": "采訪",
+    "NameExtraNumbered": "{0} {1}",
+    "NameExtraSample": "試看",
+    "NameExtraScene": "精選片段",
+    "NameExtraShort": "短篇",
+    "NameExtraThemeSong": "主題曲",
+    "NameExtraThemeVideo": "主題影片",
+    "NameExtraTrailer": "預告片",
+    "NameExtraUnknown": "額外內容"
 }

Emby.Server.Implementations/ScheduledTasks/Tasks/AudioNormalizationTask.cs

@@ -174,7 +174,7 @@ public partial class AudioNormalizationTask : IScheduledTask
                 if (!t.NormalizationGain.HasValue && !t.LUFS.HasValue && t.IsFileProtocol)
                 {
                     t.LUFS = await CalculateLUFSAsync(
-                        string.Format(CultureInfo.InvariantCulture, "-i \"{0}\"", t.Path.Replace("\"", "\\\"", StringComparison.Ordinal)),
+                        string.Format(CultureInfo.InvariantCulture, "-i \"{0}\"", t.Path.EscapeProcessArgument()),
                         false,
                         cancellationToken).ConfigureAwait(false);
                     toSaveDbItems.Add(t);

Emby.Server.Implementations/ScheduledTasks/Tasks/PeopleValidationTask.cs

@@ -109,6 +109,8 @@ public class PeopleValidationTask : IScheduledTask, IConfigurableScheduledTask
             var dupQuery = context.Peoples
                     .GroupBy(e => new { e.Name, e.PersonType })
                     .Where(e => e.Count() > 1)
+                    .OrderBy(e => e.Key.Name)
+                    .ThenBy(e => e.Key.PersonType)
                     .Select(e => e.Select(f => f.Id).ToArray());
 
             var total = dupQuery.Count();
@@ -177,33 +179,14 @@ public class PeopleValidationTask : IScheduledTask, IConfigurableScheduledTask
         var thirtyDaysAgo = DateTime.UtcNow.AddDays(-30);
         var personTypeName = _itemTypeLookup.BaseItemKindNames[BaseItemKind.Person];
 
+        List<Guid> peopleIds;
+
         var context = await _dbContextFactory.CreateDbContextAsync(cancellationToken).ConfigureAwait(false);
         await using (context.ConfigureAwait(false))
         {
-            const int PartitionSize = 100;
-
-            var numPeople = await context.BaseItems
-                .AsNoTracking()
-                .Where(b => b.Type == personTypeName)
-                .Where(b => b.DateLastRefreshed == null || b.DateLastRefreshed < thirtyDaysAgo)
-                .Where(b =>
-                    !b.Images!.Any(i => i.ImageType == ImageInfoImageType.Primary) ||
-                    string.IsNullOrEmpty(b.Overview))
-                .CountAsync(cancellationToken)
-                .ConfigureAwait(false);
-
-            _logger.LogDebug("Found {Count} people needing image/overview refresh", numPeople);
-
-            if (numPeople == 0)
-            {
-                progress.Report(100);
-                return;
-            }
-
-            var numComplete = 0;
-            var numRefreshed = 0;
-
-            await foreach (var entry in context.BaseItems
+            // Read the candidates in one go rather than paging them. A refresh stamps the person and takes
+            // it out of this set, so a growing offset over a shrinking set walks past people it never visits.
+            peopleIds = await context.BaseItems
                 .AsNoTracking()
                 .Where(b => b.Type == personTypeName)
                 .Where(b => b.DateLastRefreshed == null || b.DateLastRefreshed < thirtyDaysAgo)
@@ -211,22 +194,36 @@ public class PeopleValidationTask : IScheduledTask, IConfigurableScheduledTask
                     !b.Images!.Any(i => i.ImageType == ImageInfoImageType.Primary) ||
                     string.IsNullOrEmpty(b.Overview))
                 .OrderBy(b => b.Id)
-                .WithPartitionProgress(partition => _logger.LogDebug("Processing people partition {Partition}", partition))
-                .PartitionEagerAsync(PartitionSize, cancellationToken)
-                .WithCancellation(cancellationToken)
-                .ConfigureAwait(false))
-            {
-                if (await RefreshPersonAsync(entry.Id, cancellationToken).ConfigureAwait(false))
-                {
-                    numRefreshed++;
-                }
+                .Select(b => b.Id)
+                .ToListAsync(cancellationToken)
+                .ConfigureAwait(false);
+        }
 
-                numComplete++;
-                progress.Report(100.0 * numComplete / numPeople);
+        _logger.LogDebug("Found {Count} people needing image/overview refresh", peopleIds.Count);
+
+        if (peopleIds.Count == 0)
+        {
+            progress.Report(100);
+            return;
+        }
+
+        var numComplete = 0;
+        var numRefreshed = 0;
+
+        foreach (var personId in peopleIds)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            if (await RefreshPersonAsync(personId, cancellationToken).ConfigureAwait(false))
+            {
+                numRefreshed++;
             }
 
-            _logger.LogInformation("Refreshed metadata for {Count} people missing images or overview", numRefreshed);
+            numComplete++;
+            progress.Report(100.0 * numComplete / peopleIds.Count);
         }
+
+        _logger.LogInformation("Refreshed metadata for {Count} people missing images or overview", numRefreshed);
     }
 
     private async Task<bool> RefreshPersonAsync(Guid personId, CancellationToken cancellationToken)
@@ -243,8 +240,8 @@ public class PeopleValidationTask : IScheduledTask, IConfigurableScheduledTask
 
             var options = new MetadataRefreshOptions(new DirectoryService(_fileSystem))
             {
-                ImageRefreshMode = hasImage ? MetadataRefreshMode.ValidationOnly : MetadataRefreshMode.Default,
-                MetadataRefreshMode = hasOverview ? MetadataRefreshMode.ValidationOnly : MetadataRefreshMode.Default
+                ImageRefreshMode = hasImage ? MetadataRefreshMode.ValidationOnly : MetadataRefreshMode.FullRefresh,
+                MetadataRefreshMode = hasOverview ? MetadataRefreshMode.ValidationOnly : MetadataRefreshMode.FullRefresh
             };
 
             await item.RefreshMetadata(options, cancellationToken).ConfigureAwait(false);

Emby.Server.Implementations/Session/SessionManager.cs

@@ -309,7 +309,7 @@ namespace Emby.Server.Implementations.Session
         {
             if (!session.SessionControllers.Any(i => i.IsSessionActive))
             {
-                var key = GetSessionKey(session.Client, session.DeviceId);
+                var key = GetSessionKey(session.Client, session.DeviceId, session.UserId);
 
                 _activeConnections.TryRemove(key, out _);
                 if (!string.IsNullOrEmpty(session.PlayState?.LiveStreamId))
@@ -369,7 +369,7 @@ namespace Emby.Server.Implementations.Session
 
             if (session is not null)
             {
-                var key = GetSessionKey(session.Client, session.DeviceId);
+                var key = GetSessionKey(session.Client, session.DeviceId, session.UserId);
 
                 _activeConnections.TryRemove(key, out _);
 
@@ -475,8 +475,11 @@ namespace Emby.Server.Implementations.Session
             }
         }
 
-        private static string GetSessionKey(string appName, string deviceId)
-            => appName + deviceId;
+        // The user is part of the key because the client name and the device id are taken from the
+        // request headers and are not bound to the access token. Without it, any authenticated user
+        // could claim another user's client/device pair and take over their session.
+        private static string GetSessionKey(string appName, string deviceId, Guid userId)
+            => appName + deviceId + userId.ToString("N", CultureInfo.InvariantCulture);
 
         /// <summary>
         /// Gets the connection.
@@ -500,7 +503,7 @@ namespace Emby.Server.Implementations.Session
 
             ArgumentException.ThrowIfNullOrEmpty(deviceId);
 
-            var key = GetSessionKey(appName, deviceId);
+            var key = GetSessionKey(appName, deviceId, user?.Id ?? Guid.Empty);
             SessionInfo newSession = CreateSessionInfo(key, appName, appVersion, deviceId, deviceName, remoteEndPoint, user);
             SessionInfo sessionInfo = _activeConnections.GetOrAdd(key, newSession);
             if (ReferenceEquals(newSession, sessionInfo))
@@ -655,7 +658,7 @@ namespace Emby.Server.Implementations.Session
                             ItemId = session.NowPlayingItem is null ? Guid.Empty : session.NowPlayingItem.Id,
                             SessionId = session.Id,
                             MediaSourceId = session.PlayState?.MediaSourceId,
-                            PositionTicks = session.PlayState?.PositionTicks
+                            PositionTicks = session.LastPlaybackCheckInPositionTicks
                         }).ConfigureAwait(false);
                     }
                     catch (Exception ex)
@@ -1537,11 +1540,52 @@ namespace Emby.Server.Implementations.Session
             return SendMessageToSession(session, SessionMessageType.Playstate, command, cancellationToken);
         }
 
-        private static void AssertCanControl(SessionInfo session, SessionInfo controllingSession)
+        private void AssertCanControl(SessionInfo session, SessionInfo controllingSession)
         {
             ArgumentNullException.ThrowIfNull(session);
 
             ArgumentNullException.ThrowIfNull(controllingSession);
+
+            var controllingUserId = controllingSession.UserId;
+
+            // Controlling a session is always allowed when:
+            // - the caller has no associated user (an API key, which is a privileged context),
+            // - the target session is public (has no owning user), or
+            // - the caller's user is associated with the target session.
+            // Controlling a session owned by a different user requires the
+            // EnableRemoteControlOfOtherUsers permission.
+            if (controllingUserId.IsEmpty()
+                || session.UserId.IsEmpty()
+                || session.ContainsUser(controllingUserId))
+            {
+                return;
+            }
+
+            var controllingUser = _userManager.GetUserById(controllingUserId);
+            if (controllingUser is null
+                || !controllingUser.HasPermission(PermissionKind.EnableRemoteControlOfOtherUsers))
+            {
+                throw new SecurityException("The current user does not have permission to remote control other users.");
+            }
+        }
+
+        private void AssertCanAttachUser(SessionInfo controllingSession, Guid userId)
+        {
+            var controllingUserId = controllingSession.UserId;
+
+            // Playback reported by a session is also written to the user data of its additional users,
+            // so attaching anyone but the calling user requires administrative privileges.
+            if (controllingUserId.IsEmpty() || controllingUserId.Equals(userId))
+            {
+                return;
+            }
+
+            var controllingUser = _userManager.GetUserById(controllingUserId);
+            if (controllingUser is null
+                || !controllingUser.HasPermission(PermissionKind.IsAdministrator))
+            {
+                throw new SecurityException("The current user does not have permission to attach another user to a session.");
+            }
         }
 
         /// <summary>
@@ -1559,16 +1603,24 @@ namespace Emby.Server.Implementations.Session
         /// <summary>
         /// Adds the additional user.
         /// </summary>
+        /// <param name="controllingSessionId">The controlling session identifier.</param>
         /// <param name="sessionId">The session identifier.</param>
         /// <param name="userId">The user identifier.</param>
-        /// <exception cref="UnauthorizedAccessException">Cannot modify additional users without authenticating first.</exception>
+        /// <exception cref="SecurityException">The controlling user is not allowed to attach the user to the session.</exception>
         /// <exception cref="ArgumentException">The requested user is already the primary user of the session.</exception>
-        public void AddAdditionalUser(string sessionId, Guid userId)
+        public void AddAdditionalUser(string controllingSessionId, string sessionId, Guid userId)
         {
             CheckDisposed();
 
             var session = GetSession(sessionId);
 
+            if (!string.IsNullOrEmpty(controllingSessionId))
+            {
+                var controllingSession = GetSession(controllingSessionId);
+                AssertCanControl(session, controllingSession);
+                AssertCanAttachUser(controllingSession, userId);
+            }
+
             if (session.UserId.Equals(userId))
             {
                 throw new ArgumentException("The requested user is already the primary user of the session.");
@@ -1576,7 +1628,8 @@ namespace Emby.Server.Implementations.Session
 
             if (session.AdditionalUsers.All(i => !i.UserId.Equals(userId)))
             {
-                var user = _userManager.GetUserById(userId);
+                var user = _userManager.GetUserById(userId)
+                    ?? throw new ArgumentException("The requested user does not exist.");
                 var newUser = new SessionUserInfo
                 {
                     UserId = userId,
@@ -1590,16 +1643,22 @@ namespace Emby.Server.Implementations.Session
         /// <summary>
         /// Removes the additional user.
         /// </summary>
+        /// <param name="controllingSessionId">The controlling session identifier.</param>
         /// <param name="sessionId">The session identifier.</param>
         /// <param name="userId">The user identifier.</param>
-        /// <exception cref="UnauthorizedAccessException">Cannot modify additional users without authenticating first.</exception>
+        /// <exception cref="SecurityException">The controlling user is not allowed to control the session.</exception>
         /// <exception cref="ArgumentException">The requested user is already the primary user of the session.</exception>
-        public void RemoveAdditionalUser(string sessionId, Guid userId)
+        public void RemoveAdditionalUser(string controllingSessionId, string sessionId, Guid userId)
         {
             CheckDisposed();
 
             var session = GetSession(sessionId);
 
+            if (!string.IsNullOrEmpty(controllingSessionId))
+            {
+                AssertCanControl(session, GetSession(controllingSessionId));
+            }
+
             if (session.UserId.Equals(userId))
             {
                 throw new ArgumentException("The requested user is already the primary user of the session.");
@@ -1803,14 +1862,21 @@ namespace Emby.Server.Implementations.Session
         /// <summary>
         /// Reports the capabilities.
         /// </summary>
+        /// <param name="controllingSessionId">The controlling session identifier.</param>
         /// <param name="sessionId">The session identifier.</param>
         /// <param name="capabilities">The capabilities.</param>
-        public void ReportCapabilities(string sessionId, ClientCapabilities capabilities)
+        /// <exception cref="SecurityException">The controlling user is not allowed to control the session.</exception>
+        public void ReportCapabilities(string controllingSessionId, string sessionId, ClientCapabilities capabilities)
         {
             CheckDisposed();
 
             var session = GetSession(sessionId);
 
+            if (!string.IsNullOrEmpty(controllingSessionId))
+            {
+                AssertCanControl(session, GetSession(controllingSessionId));
+            }
+
             ReportCapabilities(session, capabilities, true);
         }
 
@@ -1905,13 +1971,18 @@ namespace Emby.Server.Implementations.Session
         }
 
         /// <inheritdoc />
-        public void ReportNowViewingItem(string sessionId, string itemId)
+        public void ReportNowViewingItem(string controllingSessionId, string sessionId, string itemId)
         {
             ArgumentException.ThrowIfNullOrEmpty(itemId);
 
             var item = _libraryManager.GetItemById(new Guid(itemId));
             var session = GetSession(sessionId);
 
+            if (!string.IsNullOrEmpty(controllingSessionId))
+            {
+                AssertCanControl(session, GetSession(controllingSessionId));
+            }
+
             session.NowViewingItem = GetItemInfo(item, null);
         }
 

Jellyfin.Api/Controllers/ArtistsController.cs

@@ -126,6 +126,12 @@ public class ArtistsController : BaseJellyfinApiController
         var dtoOptions = new DtoOptions { Fields = fields }
             .AddAdditionalDtoOptions(enableImages, enableUserData, imageTypeLimit, enableImageTypes);
 
+        // Asking for a type filter has always implied wanting that type's counts back.
+        if (includeItemTypes.Length != 0 && !dtoOptions.ContainsField(ItemFields.ItemCounts))
+        {
+            dtoOptions.Fields = [.. dtoOptions.Fields, ItemFields.ItemCounts];
+        }
+
         User? user = null;
         BaseItem parentItem = _libraryManager.GetParentItem(parentId, userId);
 
@@ -193,31 +199,7 @@ public class ArtistsController : BaseJellyfinApiController
 
         var result = _libraryManager.GetArtists(query);
 
-        var dtos = result.Items.Select(i =>
-        {
-            var (baseItem, itemCounts) = i;
-            var dto = _dtoService.GetItemByNameDto(baseItem, dtoOptions, null, user);
-
-            if (includeItemTypes.Length != 0)
-            {
-                dto.ChildCount = itemCounts.ItemCount;
-                dto.ProgramCount = itemCounts.ProgramCount;
-                dto.SeriesCount = itemCounts.SeriesCount;
-                dto.EpisodeCount = itemCounts.EpisodeCount;
-                dto.MovieCount = itemCounts.MovieCount;
-                dto.TrailerCount = itemCounts.TrailerCount;
-                dto.AlbumCount = itemCounts.AlbumCount;
-                dto.SongCount = itemCounts.SongCount;
-                dto.ArtistCount = itemCounts.ArtistCount;
-            }
-
-            return dto;
-        });
-
-        return new QueryResult<BaseItemDto>(
-            query.StartIndex,
-            result.TotalRecordCount,
-            dtos.ToArray());
+        return RequestHelpers.CreateQueryResult(result, dtoOptions, _dtoService, user);
     }
 
     /// <summary>
@@ -298,6 +280,12 @@ public class ArtistsController : BaseJellyfinApiController
         var dtoOptions = new DtoOptions { Fields = fields }
             .AddAdditionalDtoOptions(enableImages, enableUserData, imageTypeLimit, enableImageTypes);
 
+        // Asking for a type filter has always implied wanting that type's counts back.
+        if (includeItemTypes.Length != 0 && !dtoOptions.ContainsField(ItemFields.ItemCounts))
+        {
+            dtoOptions.Fields = [.. dtoOptions.Fields, ItemFields.ItemCounts];
+        }
+
         User? user = null;
         BaseItem parentItem = _libraryManager.GetParentItem(parentId, userId);
 
@@ -365,31 +353,7 @@ public class ArtistsController : BaseJellyfinApiController
 
         var result = _libraryManager.GetAlbumArtists(query);
 
-        var dtos = result.Items.Select(i =>
-        {
-            var (baseItem, itemCounts) = i;
-            var dto = _dtoService.GetItemByNameDto(baseItem, dtoOptions, null, user);
-
-            if (includeItemTypes.Length != 0)
-            {
-                dto.ChildCount = itemCounts.ItemCount;
-                dto.ProgramCount = itemCounts.ProgramCount;
-                dto.SeriesCount = itemCounts.SeriesCount;
-                dto.EpisodeCount = itemCounts.EpisodeCount;
-                dto.MovieCount = itemCounts.MovieCount;
-                dto.TrailerCount = itemCounts.TrailerCount;
-                dto.AlbumCount = itemCounts.AlbumCount;
-                dto.SongCount = itemCounts.SongCount;
-                dto.ArtistCount = itemCounts.ArtistCount;
-            }
-
-            return dto;
-        });
-
-        return new QueryResult<BaseItemDto>(
-            query.StartIndex,
-            result.TotalRecordCount,
-            dtos.ToArray());
+        return RequestHelpers.CreateQueryResult(result, dtoOptions, _dtoService, user);
     }
 
     /// <summary>

Jellyfin.Api/Controllers/DynamicHlsController.cs

@@ -20,7 +20,6 @@ using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.MediaEncoding;
 using MediaBrowser.Controller.Streaming;
-using MediaBrowser.MediaEncoding.Encoder;
 using MediaBrowser.Model.Configuration;
 using MediaBrowser.Model.Dlna;
 using MediaBrowser.Model.Entities;
@@ -1652,9 +1651,9 @@ public class DynamicHlsController : BaseJellyfinApiController
             segmentFormat,
             startNumber.ToString(CultureInfo.InvariantCulture),
             baseUrlParam,
-            EncodingUtils.NormalizePath(outputTsArg),
+            outputTsArg.EscapeProcessArgument(),
             hlsArguments,
-            EncodingUtils.NormalizePath(outputPath)).Trim();
+            outputPath.EscapeProcessArgument()).Trim();
     }
 
     /// <summary>

Jellyfin.Api/Controllers/GenresController.cs

@@ -97,6 +97,12 @@ public class GenresController : BaseJellyfinApiController
         var dtoOptions = new DtoOptions { Fields = fields }
             .AddAdditionalDtoOptions(enableImages, false, imageTypeLimit, enableImageTypes);
 
+        // Asking for a type filter has always implied wanting that type's counts back.
+        if (includeItemTypes.Length != 0 && !dtoOptions.ContainsField(ItemFields.ItemCounts))
+        {
+            dtoOptions.Fields = [.. dtoOptions.Fields, ItemFields.ItemCounts];
+        }
+
         User? user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
@@ -143,8 +149,7 @@ public class GenresController : BaseJellyfinApiController
             result = _libraryManager.GetGenres(query);
         }
 
-        var shouldIncludeItemTypes = includeItemTypes.Length != 0;
-        return RequestHelpers.CreateQueryResult(result, dtoOptions, _dtoService, shouldIncludeItemTypes, user);
+        return RequestHelpers.CreateQueryResult(result, dtoOptions, _dtoService, user);
     }
 
     /// <summary>

Jellyfin.Api/Controllers/ItemLookupController.cs

@@ -13,6 +13,7 @@ using MediaBrowser.Controller.Entities.Movies;
 using MediaBrowser.Controller.Entities.TV;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Providers;
+using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.IO;
 using MediaBrowser.Model.Providers;
 using Microsoft.AspNetCore.Authorization;
@@ -263,7 +264,7 @@ public class ItemLookupController : BaseJellyfinApiController
             searchResult.ProviderIds);
 
         // Since the refresh process won't erase provider Ids, we need to set this explicitly now.
-        item.ProviderIds = searchResult.ProviderIds;
+        item.SetProviderIds(searchResult.ProviderIds);
         await _providerManager.RefreshFullItem(
             item,
             new MetadataRefreshOptions(new DirectoryService(_fileSystem))

Jellyfin.Api/Controllers/ItemUpdateController.cs

@@ -428,15 +428,7 @@ public class ItemUpdateController : BaseJellyfinApiController
 
         if (request.ProviderIds is not null)
         {
-            foreach (var pair in request.ProviderIds.ToList())
-            {
-                if (string.IsNullOrEmpty(pair.Value))
-                {
-                    request.ProviderIds.Remove(pair.Key);
-                }
-            }
-
-            item.ProviderIds = request.ProviderIds;
+            item.SetProviderIds(request.ProviderIds);
         }
 
         if (item is Video video)

Jellyfin.Api/Controllers/LibraryStructureController.cs

@@ -14,6 +14,7 @@ using MediaBrowser.Common.Api;
 using MediaBrowser.Controller;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.IO;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Model.Configuration;
 using MediaBrowser.Model.Entities;
@@ -122,12 +123,14 @@ public class LibraryStructureController : BaseJellyfinApiController
     /// <param name="newName">The new name.</param>
     /// <param name="refreshLibrary">Whether to refresh the library.</param>
     /// <response code="204">Folder renamed.</response>
+    /// <response code="400">The new name is not a valid library name.</response>
     /// <response code="404">Library doesn't exist.</response>
     /// <response code="409">Library already exists.</response>
-    /// <returns>A <see cref="NoContentResult"/> on success, a <see cref="NotFoundResult"/> if the library doesn't exist, a <see cref="ConflictResult"/> if the new name is already taken.</returns>
+    /// <returns>A <see cref="NoContentResult"/> on success, a <see cref="BadRequestResult"/> if the new name is invalid, a <see cref="NotFoundResult"/> if the library doesn't exist, a <see cref="ConflictResult"/> if the new name is already taken.</returns>
     /// <exception cref="ArgumentNullException">The new name may not be null.</exception>
     [HttpPost("Name")]
     [ProducesResponseType(StatusCodes.Status204NoContent)]
+    [ProducesResponseType(StatusCodes.Status400BadRequest)]
     [ProducesResponseType(StatusCodes.Status404NotFound)]
     [ProducesResponseType(StatusCodes.Status409Conflict)]
     public ActionResult RenameVirtualFolder(
@@ -147,10 +150,15 @@ public class LibraryStructureController : BaseJellyfinApiController
 
         var rootFolderPath = _appPaths.DefaultUserViewsPath;
 
-        var currentPath = Path.Combine(rootFolderPath, name);
-        var newPath = Path.Combine(rootFolderPath, newName);
+        // Both names are caller supplied, so they have to be confined to the libraries root.
+        var newPath = FileSystemHelper.GetChildPath(rootFolderPath, newName);
+        if (newPath is null)
+        {
+            return BadRequest("The new name is not a valid library name.");
+        }
 
-        if (!Directory.Exists(currentPath))
+        var currentPath = FileSystemHelper.GetChildPath(rootFolderPath, name);
+        if (currentPath is null || !Directory.Exists(currentPath))
         {
             return NotFound("The media collection does not exist.");
         }

Jellyfin.Api/Controllers/MusicGenresController.cs

@@ -98,6 +98,12 @@ public class MusicGenresController : BaseJellyfinApiController
         var dtoOptions = new DtoOptions { Fields = fields }
             .AddAdditionalDtoOptions(enableImages, false, imageTypeLimit, enableImageTypes);
 
+        // Asking for a type filter has always implied wanting that type's counts back.
+        if (includeItemTypes.Length != 0 && !dtoOptions.ContainsField(ItemFields.ItemCounts))
+        {
+            dtoOptions.Fields = [.. dtoOptions.Fields, ItemFields.ItemCounts];
+        }
+
         User? user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
@@ -134,8 +140,7 @@ public class MusicGenresController : BaseJellyfinApiController
 
         var result = _libraryManager.GetMusicGenres(query);
 
-        var shouldIncludeItemTypes = includeItemTypes.Length != 0;
-        return RequestHelpers.CreateQueryResult(result, dtoOptions, _dtoService, shouldIncludeItemTypes, user);
+        return RequestHelpers.CreateQueryResult(result, dtoOptions, _dtoService, user);
     }
 
     /// <summary>

Jellyfin.Api/Controllers/PlaylistsController.cs

@@ -521,7 +521,7 @@ public class PlaylistsController : BaseJellyfinApiController
         [FromQuery] int? imageTypeLimit,
         [FromQuery, ModelBinder(typeof(CommaDelimitedCollectionModelBinder))] ImageType[] enableImageTypes)
     {
-        var callingUserId = userId ?? User.GetUserId();
+        var callingUserId = RequestHelpers.GetUserId(User, userId);
         var playlist = _playlistManager.GetPlaylistForUser(playlistId, callingUserId);
         if (playlist is null)
         {

Jellyfin.Api/Controllers/SessionController.cs

@@ -306,11 +306,14 @@ public class SessionController : BaseJellyfinApiController
     [HttpPost("Sessions/{sessionId}/User/{userId}")]
     [Authorize]
     [ProducesResponseType(StatusCodes.Status204NoContent)]
-    public ActionResult AddUserToSession(
+    public async Task<ActionResult> AddUserToSession(
         [FromRoute, Required] string sessionId,
         [FromRoute, Required] Guid userId)
     {
-        _sessionManager.AddAdditionalUser(sessionId, userId);
+        _sessionManager.AddAdditionalUser(
+            await RequestHelpers.GetSessionId(_sessionManager, _userManager, HttpContext).ConfigureAwait(false),
+            sessionId,
+            userId);
         return NoContent();
     }
 
@@ -324,11 +327,14 @@ public class SessionController : BaseJellyfinApiController
     [HttpDelete("Sessions/{sessionId}/User/{userId}")]
     [Authorize]
     [ProducesResponseType(StatusCodes.Status204NoContent)]
-    public ActionResult RemoveUserFromSession(
+    public async Task<ActionResult> RemoveUserFromSession(
         [FromRoute, Required] string sessionId,
         [FromRoute, Required] Guid userId)
     {
-        _sessionManager.RemoveAdditionalUser(sessionId, userId);
+        _sessionManager.RemoveAdditionalUser(
+            await RequestHelpers.GetSessionId(_sessionManager, _userManager, HttpContext).ConfigureAwait(false),
+            sessionId,
+            userId);
         return NoContent();
     }
 
@@ -352,12 +358,13 @@ public class SessionController : BaseJellyfinApiController
         [FromQuery] bool supportsMediaControl = false,
         [FromQuery] bool supportsPersistentIdentifier = true)
     {
+        var currentSessionId = await RequestHelpers.GetSessionId(_sessionManager, _userManager, HttpContext).ConfigureAwait(false);
         if (string.IsNullOrWhiteSpace(id))
         {
-            id = await RequestHelpers.GetSessionId(_sessionManager, _userManager, HttpContext).ConfigureAwait(false);
+            id = currentSessionId;
         }
 
-        _sessionManager.ReportCapabilities(id, new ClientCapabilities
+        _sessionManager.ReportCapabilities(currentSessionId, id, new ClientCapabilities
         {
             PlayableMediaTypes = playableMediaTypes,
             SupportedCommands = supportedCommands,
@@ -381,12 +388,13 @@ public class SessionController : BaseJellyfinApiController
         [FromQuery] string? id,
         [FromBody, Required] ClientCapabilitiesDto capabilities)
     {
+        var currentSessionId = await RequestHelpers.GetSessionId(_sessionManager, _userManager, HttpContext).ConfigureAwait(false);
         if (string.IsNullOrWhiteSpace(id))
         {
-            id = await RequestHelpers.GetSessionId(_sessionManager, _userManager, HttpContext).ConfigureAwait(false);
+            id = currentSessionId;
         }
 
-        _sessionManager.ReportCapabilities(id, capabilities.ToClientCapabilities());
+        _sessionManager.ReportCapabilities(currentSessionId, id, capabilities.ToClientCapabilities());
 
         return NoContent();
     }
@@ -405,9 +413,9 @@ public class SessionController : BaseJellyfinApiController
         [FromQuery] string? sessionId,
         [FromQuery, Required] string? itemId)
     {
-        string session = sessionId ?? await RequestHelpers.GetSessionId(_sessionManager, _userManager, HttpContext).ConfigureAwait(false);
+        var currentSessionId = await RequestHelpers.GetSessionId(_sessionManager, _userManager, HttpContext).ConfigureAwait(false);
 
-        _sessionManager.ReportNowViewingItem(session, itemId);
+        _sessionManager.ReportNowViewingItem(currentSessionId, sessionId ?? currentSessionId, itemId);
         return NoContent();
     }
 

Jellyfin.Api/Controllers/StudiosController.cs

@@ -92,6 +92,12 @@ public class StudiosController : BaseJellyfinApiController
         var dtoOptions = new DtoOptions { Fields = fields }
             .AddAdditionalDtoOptions(enableImages, enableUserData, imageTypeLimit, enableImageTypes);
 
+        // Asking for a type filter has always implied wanting that type's counts back.
+        if (includeItemTypes.Length != 0 && !dtoOptions.ContainsField(ItemFields.ItemCounts))
+        {
+            dtoOptions.Fields = [.. dtoOptions.Fields, ItemFields.ItemCounts];
+        }
+
         User? user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
@@ -126,8 +132,7 @@ public class StudiosController : BaseJellyfinApiController
         }
 
         var result = _libraryManager.GetStudios(query);
-        var shouldIncludeItemTypes = includeItemTypes.Length != 0;
-        return RequestHelpers.CreateQueryResult(result, dtoOptions, _dtoService, shouldIncludeItemTypes, user);
+        return RequestHelpers.CreateQueryResult(result, dtoOptions, _dtoService, user);
     }
 
     /// <summary>

Jellyfin.Api/Controllers/UserLibraryController.cs

@@ -34,6 +34,8 @@ namespace Jellyfin.Api.Controllers;
 [Tags("Library")]
 public class UserLibraryController : BaseJellyfinApiController
 {
+    private static readonly TimeSpan RefreshOnDemandTimeout = TimeSpan.FromSeconds(3);
+
     private readonly IUserManager _userManager;
     private readonly IUserDataManager _userDataRepository;
     private readonly ILibraryManager _libraryManager;
@@ -79,7 +81,7 @@ public class UserLibraryController : BaseJellyfinApiController
     /// <returns>An <see cref="OkResult"/> containing the item.</returns>
     [HttpGet("Items/{itemId}")]
     [ProducesResponseType(StatusCodes.Status200OK)]
-    public ActionResult<BaseItemDto> GetItem(
+    public async Task<ActionResult<BaseItemDto>> GetItem(
         [FromQuery] Guid? userId,
         [FromRoute, Required] Guid itemId)
     {
@@ -98,7 +100,7 @@ public class UserLibraryController : BaseJellyfinApiController
             return NotFound();
         }
 
-        QueueRefreshOnDemandIfNeeded(item);
+        await RefreshOnDemandIfNeeded(item).ConfigureAwait(false);
 
         var dtoOptions = new DtoOptions();
 
@@ -116,7 +118,7 @@ public class UserLibraryController : BaseJellyfinApiController
     [ProducesResponseType(StatusCodes.Status200OK)]
     [Obsolete("Kept for backwards compatibility")]
     [ApiExplorerSettings(IgnoreApi = true)]
-    public ActionResult<BaseItemDto> GetItemLegacy(
+    public Task<ActionResult<BaseItemDto>> GetItemLegacy(
         [FromRoute, Required] Guid userId,
         [FromRoute, Required] Guid itemId)
         => GetItem(userId, itemId);
@@ -643,7 +645,7 @@ public class UserLibraryController : BaseJellyfinApiController
             limit,
             groupItems);
 
-    private void QueueRefreshOnDemandIfNeeded(BaseItem item)
+    private async Task RefreshOnDemandIfNeeded(BaseItem item)
     {
         if (item is not Person)
         {
@@ -656,15 +658,24 @@ public class UserLibraryController : BaseJellyfinApiController
             return;
         }
 
-        _providerManager.QueueRefresh(
-            item.Id,
-            new MetadataRefreshOptions(new DirectoryService(_fileSystem))
-            {
-                MetadataRefreshMode = MetadataRefreshMode.FullRefresh,
-                ImageRefreshMode = MetadataRefreshMode.FullRefresh,
-                ForceSave = true
-            },
-            RefreshPriority.High);
+        var options = new MetadataRefreshOptions(new DirectoryService(_fileSystem))
+        {
+            MetadataRefreshMode = MetadataRefreshMode.FullRefresh,
+            ImageRefreshMode = MetadataRefreshMode.FullRefresh,
+            ForceSave = true
+        };
+
+        using var timeout = CancellationTokenSource.CreateLinkedTokenSource(HttpContext.RequestAborted);
+        timeout.CancelAfter(RefreshOnDemandTimeout);
+
+        try
+        {
+            await item.RefreshMetadata(options, timeout.Token).ConfigureAwait(false);
+        }
+        catch (OperationCanceledException) when (!HttpContext.RequestAborted.IsCancellationRequested)
+        {
+            _providerManager.QueueRefresh(item.Id, options, RefreshPriority.High);
+        }
     }
 
     /// <summary>

Jellyfin.Api/Helpers/RequestHelpers.cs

@@ -156,7 +156,6 @@ public static class RequestHelpers
         QueryResult<(BaseItem Item, ItemCounts ItemCounts)> result,
         DtoOptions dtoOptions,
         IDtoService dtoService,
-        bool includeItemTypes,
         User? user)
     {
         var dtos = result.Items.Select(i =>
@@ -164,7 +163,7 @@ public static class RequestHelpers
             var (baseItem, counts) = i;
             var dto = dtoService.GetItemByNameDto(baseItem, dtoOptions, null, user);
 
-            if (includeItemTypes)
+            if (counts is not null)
             {
                 dto.ChildCount = counts.ItemCount;
                 dto.ProgramCount = counts.ProgramCount;
@@ -175,6 +174,7 @@ public static class RequestHelpers
                 dto.AlbumCount = counts.AlbumCount;
                 dto.SongCount = counts.SongCount;
                 dto.ArtistCount = counts.ArtistCount;
+                dto.MusicVideoCount = counts.MusicVideoCount;
             }
 
             return dto;

Jellyfin.Server.Implementations/Item/BaseItemRepository.ByName.cs

@@ -246,14 +246,20 @@ public sealed partial class BaseItemRepository
         }
 
         result.StartIndex = filter.StartIndex ?? 0;
-        if (filter.IncludeItemTypes.Length > 0)
+        var page = query.AsEnumerable().Where(e => e is not null).ToList();
+
+        if (filter.DtoOptions.ContainsField(ItemFields.ItemCounts))
         {
-            var countsByCleanName = BuildItemCountsByCleanName(context, filter, itemValueTypes);
+            var pageCleanNames = page
+                .Where(e => !string.IsNullOrEmpty(e.CleanName))
+                .Select(e => e.CleanName!)
+                .Distinct()
+                .ToList();
+
+            var countsByCleanName = BuildItemCountsByCleanName(context, filter, itemValueTypes, pageCleanNames);
             result.Items =
             [
-                .. query
-                    .AsEnumerable()
-                    .Where(e => e is not null)
+                .. page
                     .Select(e =>
                     {
                         var item = DeserializeBaseItem(e, filter.SkipDeserialization);
@@ -268,9 +274,7 @@ public sealed partial class BaseItemRepository
         {
             result.Items =
             [
-                .. query
-                    .AsEnumerable()
-                    .Where(e => e != null)
+                .. page
                     .Select(e => DeserializeBaseItem(e, filter.SkipDeserialization))
                     .Where(item => item != null)
                     .Select(item => (item!, (ItemCounts?)null))
@@ -281,14 +285,22 @@ public sealed partial class BaseItemRepository
     }
 
     private Dictionary<string, ItemCounts> BuildItemCountsByCleanName(
-        Database.Implementations.JellyfinDbContext context,
+        JellyfinDbContext context,
         InternalItemsQuery filter,
-        IReadOnlyList<ItemValueType> itemValueTypes)
+        IReadOnlyList<ItemValueType> itemValueTypes,
+        IReadOnlyList<string> cleanNames)
     {
-        var typeSubQuery = new InternalItemsQuery(filter.User)
+        var countsByCleanName = new Dictionary<string, ItemCounts>();
+        if (cleanNames.Count == 0)
+        {
+            return countsByCleanName;
+        }
+
+        // The counts describe everything the value is attached to, not only the types the list was
+        // filtered down to.
+        var scopeQuery = new InternalItemsQuery(filter.User)
         {
             ExcludeItemTypes = filter.ExcludeItemTypes,
-            IncludeItemTypes = filter.IncludeItemTypes,
             MediaTypes = filter.MediaTypes,
             AncestorIds = filter.AncestorIds,
             ExcludeItemIds = filter.ExcludeItemIds,
@@ -298,33 +310,51 @@ public sealed partial class BaseItemRepository
             IsPlayed = filter.IsPlayed
         };
 
-        var itemCountQuery = TranslateQuery(context.BaseItems.AsNoTracking().Where(e => e.Id != EF.Constant(PlaceholderId)), context, typeSubQuery)
-            .Where(e => e.ItemValues!.Any(f => itemValueTypes!.Contains(f.ItemValue.Type)));
+        var scopedItems = TranslateQuery(context.BaseItems.AsNoTracking().Where(e => e.Id != EF.Constant(PlaceholderId)), context, scopeQuery);
+        var valueLinks = context.ItemValuesMap
+            .AsNoTracking()
+            .Where(ivm => itemValueTypes.Contains(ivm.ItemValue.Type))
+            .WhereOneOrMany(cleanNames, ivm => ivm.ItemValue.CleanValue);
 
         var seriesTypeName = _itemTypeLookup.BaseItemKindNames[BaseItemKind.Series];
         var movieTypeName = _itemTypeLookup.BaseItemKindNames[BaseItemKind.Movie];
         var episodeTypeName = _itemTypeLookup.BaseItemKindNames[BaseItemKind.Episode];
         var musicAlbumTypeName = _itemTypeLookup.BaseItemKindNames[BaseItemKind.MusicAlbum];
         var musicArtistTypeName = _itemTypeLookup.BaseItemKindNames[BaseItemKind.MusicArtist];
+        var musicVideoTypeName = _itemTypeLookup.BaseItemKindNames[BaseItemKind.MusicVideo];
+        var programTypeName = _itemTypeLookup.BaseItemKindNames[BaseItemKind.LiveTvProgram];
         var audioTypeName = _itemTypeLookup.BaseItemKindNames[BaseItemKind.Audio];
         var trailerTypeName = _itemTypeLookup.BaseItemKindNames[BaseItemKind.Trailer];
-        var itemIds = itemCountQuery.Select(e => e.Id);
 
         // Rewrite query to avoid SelectMany on navigation properties (which requires SQL APPLY, not supported on SQLite)
         // Instead, start from ItemValueMaps and join with BaseItems.
-        var rawCounts = context.ItemValuesMap
-            .Where(ivm => itemValueTypes.Contains(ivm.ItemValue.Type))
-            .Where(ivm => itemIds.Contains(ivm.ItemId))
+        var rawCounts = valueLinks
             .Join(
-                context.BaseItems,
+                scopedItems,
                 ivm => ivm.ItemId,
                 e => e.Id,
-                (ivm, e) => new { CleanName = ivm.ItemValue.CleanValue, e.Type })
-            .GroupBy(x => new { x.CleanName, x.Type })
-            .Select(g => new { g.Key.CleanName, g.Key.Type, Count = g.Count() })
-            .AsEnumerable();
+                (ivm, e) => new { CleanName = ivm.ItemValue.CleanValue, e.Type, e.SeriesId })
+            .GroupBy(x => new { x.CleanName, x.Type, x.SeriesId })
+            .Select(g => new { g.Key.CleanName, g.Key.Type, g.Key.SeriesId, Count = g.Count() })
+            .ToList();
+
+        // Only studios and genres pass down from a series to its episodes; an artist credit does not.
+        var inheritsToEpisodes = itemValueTypes.Contains(ItemValueType.Studios) || itemValueTypes.Contains(ItemValueType.Genre);
+        var episodeCounts = inheritsToEpisodes
+            ? BuildEpisodeCountsByCleanName(
+                scopedItems,
+                valueLinks,
+                rawCounts
+                    .Where(x => x.Type == episodeTypeName)
+                    .Select(x => (x.CleanName, x.SeriesId, x.Count))
+                    .ToList(),
+                seriesTypeName,
+                episodeTypeName)
+            : rawCounts
+                .Where(x => x.Type == episodeTypeName)
+                .GroupBy(x => x.CleanName)
+                .ToDictionary(g => g.Key, g => g.Sum(x => x.Count));
 
-        var countsByCleanName = new Dictionary<string, ItemCounts>();
         foreach (var group in rawCounts.GroupBy(x => x.CleanName))
         {
             var counts = new ItemCounts();
@@ -334,10 +364,6 @@ public sealed partial class BaseItemRepository
                 {
                     counts.SeriesCount += row.Count;
                 }
-                else if (row.Type == episodeTypeName)
-                {
-                    counts.EpisodeCount += row.Count;
-                }
                 else if (row.Type == movieTypeName)
                 {
                     counts.MovieCount += row.Count;
@@ -350,6 +376,14 @@ public sealed partial class BaseItemRepository
                 {
                     counts.ArtistCount += row.Count;
                 }
+                else if (row.Type == musicVideoTypeName)
+                {
+                    counts.MusicVideoCount += row.Count;
+                }
+                else if (row.Type == programTypeName)
+                {
+                    counts.ProgramCount += row.Count;
+                }
                 else if (row.Type == audioTypeName)
                 {
                     counts.SongCount += row.Count;
@@ -360,9 +394,72 @@ public sealed partial class BaseItemRepository
                 }
             }
 
+            // Episodes are counted separately: the value is usually only written on the series.
+            counts.EpisodeCount = episodeCounts.GetValueOrDefault(group.Key);
+            counts.ItemCount = counts.TotalItemCount();
             countsByCleanName[group.Key] = counts;
         }
 
+        // A value carried by nothing but the episodes below a tagged series has no row of its own.
+        foreach (var (cleanName, episodeCount) in episodeCounts)
+        {
+            if (!countsByCleanName.ContainsKey(cleanName))
+            {
+                countsByCleanName[cleanName] = new ItemCounts { EpisodeCount = episodeCount, ItemCount = episodeCount };
+            }
+        }
+
         return countsByCleanName;
     }
+
+    private static Dictionary<string, int> BuildEpisodeCountsByCleanName(
+        IQueryable<BaseItemEntity> scopedItems,
+        IQueryable<ItemValueMap> valueLinks,
+        IReadOnlyList<(string CleanName, Guid? SeriesId, int Count)> taggedEpisodes,
+        string seriesTypeName,
+        string episodeTypeName)
+    {
+        // Resolved in steps rather than as one union: each of these drives off an index, while the
+        // single-statement form leaves SQLite free to scan every episode in the library instead.
+        var taggedSeries = valueLinks
+            .Join(
+                scopedItems.Where(e => e.Type == seriesTypeName),
+                ivm => ivm.ItemId,
+                e => e.Id,
+                (ivm, e) => new { CleanName = ivm.ItemValue.CleanValue, SeriesId = e.Id })
+            .ToList();
+
+        var seriesIds = taggedSeries.Select(x => x.SeriesId).Distinct().ToArray();
+        var episodesPerSeries = seriesIds.Length == 0
+            ? []
+            : scopedItems
+                .Where(e => e.Type == episodeTypeName && e.SeriesId != null)
+                .WhereOneOrMany(seriesIds, e => e.SeriesId!.Value)
+                .GroupBy(e => e.SeriesId!.Value)
+                .Select(g => new { SeriesId = g.Key, Count = g.Count() })
+                .ToDictionary(x => x.SeriesId, x => x.Count);
+
+        var episodeCounts = new Dictionary<string, int>();
+        var seriesByCleanName = new Dictionary<string, HashSet<Guid>>();
+        foreach (var group in taggedSeries.GroupBy(x => x.CleanName))
+        {
+            var series = group.Select(x => x.SeriesId).ToHashSet();
+            seriesByCleanName[group.Key] = series;
+            episodeCounts[group.Key] = series.Sum(id => episodesPerSeries.GetValueOrDefault(id));
+        }
+
+        foreach (var (cleanName, seriesId, count) in taggedEpisodes)
+        {
+            if (seriesId is not null
+                && seriesByCleanName.TryGetValue(cleanName, out var series)
+                && series.Contains(seriesId.Value))
+            {
+                continue;
+            }
+
+            episodeCounts[cleanName] = episodeCounts.GetValueOrDefault(cleanName) + count;
+        }
+
+        return episodeCounts;
+    }
 }

Jellyfin.Server.Implementations/Item/BaseItemRepository.QueryBuilding.cs

@@ -12,6 +12,7 @@ using Jellyfin.Database.Implementations;
 using Jellyfin.Database.Implementations.Entities;
 using Jellyfin.Database.Implementations.Enums;
 using Jellyfin.Extensions;
+using Jellyfin.Server.Implementations.Extensions;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.Querying;
@@ -323,10 +324,21 @@ public sealed partial class BaseItemRepository
             orderedQuery = query.OrderBy(relevanceExpression);
         }
 
+        // Folders carry no played flag of their own, so these two keys go through the same predicate
+        // the isPlayed filter uses rather than through the stored-column lookup in OrderMapper.
+        Expression<Func<BaseItemEntity, object?>> MapOrderByField(ItemSortBy sortBy) => sortBy switch
+        {
+            ItemSortBy.IsPlayed when filter.User is not null
+                => AsOrderKey(BuildIsPlayedFilter(context, filter.User)),
+            ItemSortBy.IsUnplayed when filter.User is not null
+                => AsOrderKey(BuildIsPlayedFilter(context, filter.User).Not()),
+            _ => OrderMapper.MapOrderByField(sortBy, filter, context)
+        };
+
         if (orderBy.Length > 0)
         {
             var firstOrdering = orderBy[0];
-            var expression = OrderMapper.MapOrderByField(firstOrdering.OrderBy, filter, context);
+            var expression = MapOrderByField(firstOrdering.OrderBy);
 
             if (orderedQuery is null)
             {
@@ -350,7 +362,7 @@ public sealed partial class BaseItemRepository
 
             foreach (var item in orderBy.Skip(1))
             {
-                expression = OrderMapper.MapOrderByField(item.OrderBy, filter, context);
+                expression = MapOrderByField(item.OrderBy);
                 orderedQuery = item.SortOrder == SortOrder.Ascending
                     ? orderedQuery.ThenBy(expression)
                     : orderedQuery.ThenByDescending(expression);
@@ -666,6 +678,9 @@ public sealed partial class BaseItemRepository
         return ApplyAccessFiltering(context, leafItems, new InternalItemsQuery(user) { IncludeOwnedItems = includeOwnedItems });
     }
 
+    private static Expression<Func<BaseItemEntity, object?>> AsOrderKey(Expression<Func<BaseItemEntity, bool>> predicate)
+        => Expression.Lambda<Func<BaseItemEntity, object?>>(Expression.Convert(predicate.Body, typeof(object)), predicate.Parameters);
+
     /// <inheritdoc />
     public Expression<Func<BaseItemEntity, bool>> BuildHasDescendantFilter(JellyfinDbContext context, IQueryable<BaseItemEntity> descendants)
     {

Jellyfin.Server.Implementations/Item/BaseItemRepository.Querying.cs

@@ -110,7 +110,7 @@ public sealed partial class BaseItemRepository
         PrepareFilterQuery(filter);
 
         // Early exit if collection type is not supported
-        if (collectionType is not CollectionType.movies and not CollectionType.tvshows and not CollectionType.music)
+        if (collectionType is not CollectionType.movies and not CollectionType.tvshows and not CollectionType.music and not CollectionType.unknown)
         {
             return [];
         }
@@ -121,30 +121,27 @@ public sealed partial class BaseItemRepository
         var baseQuery = PrepareItemQuery(context, filter);
         baseQuery = TranslateQuery(baseQuery, context, filter);
 
-        if (collectionType == CollectionType.tvshows)
+        if (collectionType is CollectionType.tvshows)
         {
             return GetLatestTvShowItems(context, baseQuery, filter, limit);
         }
 
         if (collectionType is CollectionType.movies)
         {
-            // Pick, per PresentationUniqueKey, the newest item; return the newest `limit` of those.
-            // Build up until limit by streaming through results and deduplicating on the fly.
-            var orderedIds = baseQuery
-                .Where(e => e.PresentationUniqueKey != null)
-                .OrderByDescending(e => e.DateCreated)
-                .ThenByDescending(e => e.Id)
-                .Select(e => new { e.Id, e.PresentationUniqueKey });
+            return GetLatestMovieItems(context, baseQuery, filter, limit);
+        }
 
-            // DistinctBy and Take are lazy, so enumeration stops as soon as limit distinct keys are read.
-            var firstIds = orderedIds
-                .AsEnumerable()
-                .DistinctBy(row => row.PresentationUniqueKey)
-                .Select(row => row.Id)
+        if (collectionType is CollectionType.unknown)
+        {
+            var moviesQuery = baseQuery.Where(e => e.SeriesName == null);
+            var latestMovies = GetLatestMovieItems(context, moviesQuery, filter, limit);
+            var latestShows = GetLatestTvShowItems(context, baseQuery, filter, limit);
+
+            return latestMovies.Concat(latestShows)
+                .OrderByDescending(dto => dto.DateCreated)
+                .ThenByDescending(dto => dto.Id)
                 .Take(limit ?? int.MaxValue)
                 .ToList();
-
-            return LoadLatestByIds(context, firstIds, filter);
         }
 
         var musicAlbumTypeName = _itemTypeLookup.BaseItemKindNames[BaseItemKind.MusicAlbum]!;
@@ -225,6 +222,39 @@ public sealed partial class BaseItemRepository
             .ToArray()!;
     }
 
+    /// <summary>
+    /// Gets the latest movies, deduplicated so each movie only appears once.
+    /// </summary>
+    /// <param name="context">The database context.</param>
+    /// <param name="baseQuery">The query to pull movies from, with filters already applied.</param>
+    /// <param name="filter">The original query filter, used when loading the final items.</param>
+    /// <param name="limit">How many items to return.</param>
+    /// <returns>The latest movies, newest first.</returns>
+    private IReadOnlyList<BaseItemDto> GetLatestMovieItems(
+        JellyfinDbContext context,
+        IQueryable<BaseItemEntity> baseQuery,
+        InternalItemsQuery filter,
+        int? limit)
+    {
+        // Pick, per PresentationUniqueKey, the newest item; return the newest `limit` of those.
+        // Build up until limit by streaming through results and deduplicating on the fly.
+        var orderedIds = baseQuery
+            .Where(e => e.PresentationUniqueKey != null)
+            .OrderByDescending(e => e.DateCreated)
+            .ThenByDescending(e => e.Id)
+            .Select(e => new { e.Id, e.PresentationUniqueKey });
+
+        // DistinctBy and Take are lazy, so enumeration stops as soon as limit distinct keys are read.
+        var firstIds = orderedIds
+            .AsEnumerable()
+            .DistinctBy(row => row.PresentationUniqueKey)
+            .Select(row => row.Id)
+            .Take(limit ?? int.MaxValue)
+            .ToList();
+
+        return LoadLatestByIds(context, firstIds, filter);
+    }
+
     /// <summary>
     /// Gets the latest TV show items with smart Season/Series container selection.
     /// </summary>

Jellyfin.Server.Implementations/Item/BaseItemRepository.TranslateQuery.cs

@@ -35,6 +35,39 @@ public sealed partial class BaseItemRepository
     // instance across several lambdas, and this filter is combined into a tree more than once.
     private static Expression<Func<BaseItemEntity, bool>> IsFolderFilter => e => e.IsFolder;
 
+    // Shared by the isPlayed filter and the IsPlayed/IsUnplayed ordering so the two cannot disagree.
+    private Expression<Func<BaseItemEntity, bool>> BuildIsPlayedFilter(JellyfinDbContext context, User user)
+    {
+        var userId = user.Id;
+
+        // Leaf items carry their own played state.
+        var playedItemIds = context.UserData
+            .Where(ud => ud.UserId == userId && ud.Played)
+            .Select(ud => ud.ItemId);
+
+        // Folders (Series, Seasons, BoxSets, albums, ...) have none and count as played once no
+        // descendant is left unplayed, matching what the DTO reports for them. This has to key off
+        // the item itself rather than off the requested item types: tag and collection listings mix
+        // folders and leaf items in a single query.
+        var unplayedLeafItems = GetAccessFilteredLeafItemsQuery(context, user)
+            .Where(e => !e.UserData!.Any(ud => ud.UserId == userId && ud.Played));
+
+        return IsFolderFilter.And(BuildHasDescendantFilter(context, unplayedLeafItems).Not())
+            .Or(IsFolderFilter.Not().And(e => playedItemIds.Contains(e.Id)));
+    }
+
+    // "und" is the language filters' stand-in for a track that declares no language at all.
+    private static string NormalizeLanguage(string language)
+        => string.Equals(language, "und", StringComparison.OrdinalIgnoreCase) ? "und" : language;
+
+    // The primary versions whose alternate version satisfies a dimension bound. Anchored on
+    // PrimaryVersionId so the filtered index carries it rather than a scan of every item.
+    private static IQueryable<Guid> VersionsMatchingDimension(JellyfinDbContext context, Expression<Func<BaseItemEntity, bool>> bound)
+        => context.BaseItems
+            .Where(v => v.PrimaryVersionId != null)
+            .Where(bound)
+            .Select(v => v.PrimaryVersionId!.Value);
+
     /// <inheritdoc />
     public IQueryable<BaseItemEntity> TranslateQuery(
         IQueryable<BaseItemEntity> baseQuery,
@@ -70,47 +103,86 @@ public sealed partial class BaseItemRepository
                 include4K = true;
             }
 
-            // Non-folders: check own resolution directly (no subquery).
-            // Folders (Series, BoxSets): EXISTS check on descendants/linked children.
-            // Using navigation properties (a.Item, lc.Child) produces efficient
-            // EXISTS + JOIN instead of nested IN (SELECT ...) subqueries.
+            // A 4K remux of an SD primary is a version of the same item, so the bucket a caller filters
+            // on is the best any of the item's versions offers, not just the primary file's. Three sets,
+            // because a bucket is as much about what the version group does not have as what it does, and
+            // because an unprobed primary can still be placed by a version that does carry dimensions.
+            // The filtered PrimaryVersionId index keeps all three to the few items that have versions.
+            var versionsSd = VersionsMatchingDimension(context, v => v.Width > 0 && v.Width < HDWidth);
+            var versionsHd = VersionsMatchingDimension(context, v => v.Width >= HDWidth);
+            var versions4K = VersionsMatchingDimension(context, v => v.Width >= UHDWidth || v.Height >= UHDHeight);
+
+            // Only the SD test needs the Width > 0 guard against a row with no dimensions: such a row
+            // cannot reach the HD or 4K bound anyway, and EF lowers the HD bucket's negated "not itself
+            // 4K" guard to CASE WHEN ... THEN 0 ELSE 1, which already reads unknown as not 4K rather
+            // than propagating a null. Folders (Series, BoxSets) answer on their descendants, bucketed
+            // exactly as a top-level item is so that the two cannot disagree; the navigation properties
+            // (a.Item, lc.Child) give EXISTS + JOIN rather than nested IN (SELECT ...).
             baseQuery = baseQuery.Where(e =>
-                (!e.IsFolder && e.Width > 0
-                    && ((includeSD && e.Width < HDWidth)
-                        || (includeHD && e.Width >= HDWidth && !(e.Width >= UHDWidth || e.Height >= UHDHeight))
-                        || (include4K && (e.Width >= UHDWidth || e.Height >= UHDHeight))))
+                (!e.IsFolder
+                    && ((includeSD
+                            && ((e.Width > 0 && e.Width < HDWidth) || versionsSd.Contains(e.Id))
+                            && !versionsHd.Contains(e.Id)
+                            && !versions4K.Contains(e.Id))
+                        || (includeHD
+                            && (e.Width >= HDWidth || versionsHd.Contains(e.Id))
+                            && !(e.Width >= UHDWidth || e.Height >= UHDHeight)
+                            && !versions4K.Contains(e.Id))
+                        || (include4K
+                            && (e.Width >= UHDWidth || e.Height >= UHDHeight || versions4K.Contains(e.Id)))))
                 || (e.IsFolder
                     && (e.Children!.Any(a =>
-                            a.Item.Width > 0
-                            && ((includeSD && a.Item.Width < HDWidth)
-                                || (includeHD && a.Item.Width >= HDWidth && !(a.Item.Width >= UHDWidth || a.Item.Height >= UHDHeight))
-                                || (include4K && (a.Item.Width >= UHDWidth || a.Item.Height >= UHDHeight))))
+                            (includeSD
+                                && ((a.Item.Width > 0 && a.Item.Width < HDWidth) || versionsSd.Contains(a.ItemId))
+                                && !versionsHd.Contains(a.ItemId)
+                                && !versions4K.Contains(a.ItemId))
+                            || (includeHD
+                                && (a.Item.Width >= HDWidth || versionsHd.Contains(a.ItemId))
+                                && !(a.Item.Width >= UHDWidth || a.Item.Height >= UHDHeight)
+                                && !versions4K.Contains(a.ItemId))
+                            || (include4K
+                                && (a.Item.Width >= UHDWidth || a.Item.Height >= UHDHeight || versions4K.Contains(a.ItemId))))
                         || context.LinkedChildren.Any(lc =>
                             lc.ParentId == e.Id
-                            && lc.Child!.Width > 0
-                            && ((includeSD && lc.Child.Width < HDWidth)
-                                || (includeHD && lc.Child.Width >= HDWidth && !(lc.Child.Width >= UHDWidth || lc.Child.Height >= UHDHeight))
-                                || (include4K && (lc.Child.Width >= UHDWidth || lc.Child.Height >= UHDHeight)))))));
+                            && ((includeSD
+                                    && ((lc.Child!.Width > 0 && lc.Child!.Width < HDWidth) || versionsSd.Contains(lc.ChildId))
+                                    && !versionsHd.Contains(lc.ChildId)
+                                    && !versions4K.Contains(lc.ChildId))
+                                || (includeHD
+                                    && (lc.Child!.Width >= HDWidth || versionsHd.Contains(lc.ChildId))
+                                    && !(lc.Child!.Width >= UHDWidth || lc.Child!.Height >= UHDHeight)
+                                    && !versions4K.Contains(lc.ChildId))
+                                || (include4K
+                                    && (lc.Child!.Width >= UHDWidth || lc.Child!.Height >= UHDHeight || versions4K.Contains(lc.ChildId))))))));
         }
 
+        // Same reasoning as the resolution filter: a dimension bound is met if any version meets it.
         if (minWidth.HasValue)
         {
-            baseQuery = baseQuery.Where(e => e.Width >= minWidth);
+            var versionsWideEnough = VersionsMatchingDimension(context, v => v.Width >= minWidth);
+            baseQuery = baseQuery.Where(e => e.Width >= minWidth || versionsWideEnough.Contains(e.Id));
         }
 
         if (filter.MinHeight.HasValue)
         {
-            baseQuery = baseQuery.Where(e => e.Height >= filter.MinHeight);
+            var minHeight = filter.MinHeight;
+            var versionsTallEnough = VersionsMatchingDimension(context, v => v.Height >= minHeight);
+            baseQuery = baseQuery.Where(e => e.Height >= minHeight || versionsTallEnough.Contains(e.Id));
         }
 
+        // An upper bound inverts that: it is met only if no version breaches it, since the item's
+        // resolution is the best its version group offers.
         if (maxWidth.HasValue)
         {
-            baseQuery = baseQuery.Where(e => e.Width <= maxWidth);
+            var versionsTooWide = VersionsMatchingDimension(context, v => v.Width > maxWidth);
+            baseQuery = baseQuery.Where(e => e.Width <= maxWidth && !versionsTooWide.Contains(e.Id));
         }
 
         if (filter.MaxHeight.HasValue)
         {
-            baseQuery = baseQuery.Where(e => e.Height <= filter.MaxHeight);
+            var maxHeight = filter.MaxHeight;
+            var versionsTooTall = VersionsMatchingDimension(context, v => v.Height > maxHeight);
+            baseQuery = baseQuery.Where(e => e.Height <= maxHeight && !versionsTooTall.Contains(e.Id));
         }
 
         if (filter.IsLocked.HasValue)
@@ -472,22 +544,7 @@ public sealed partial class BaseItemRepository
 
         if (filter.IsPlayed.HasValue)
         {
-            var userId = filter.User!.Id;
-
-            // Leaf items carry their own played state.
-            var playedItemIds = context.UserData
-                .Where(ud => ud.UserId == userId && ud.Played)
-                .Select(ud => ud.ItemId);
-
-            // Folders (Series, Seasons, BoxSets, albums, ...) have none and count as played once no
-            // descendant is left unplayed, matching what the DTO reports for them. This has to key off
-            // the item itself rather than off the requested item types: tag and collection listings mix
-            // folders and leaf items in a single query.
-            var unplayedLeafItems = GetAccessFilteredLeafItemsQuery(context, filter.User!)
-                .Where(e => !e.UserData!.Any(ud => ud.UserId == userId && ud.Played));
-
-            var isPlayedFilter = IsFolderFilter.And(BuildHasDescendantFilter(context, unplayedLeafItems).Not())
-                .Or(IsFolderFilter.Not().And(e => playedItemIds.Contains(e.Id)));
+            var isPlayedFilter = BuildIsPlayedFilter(context, filter.User!);
 
             baseQuery = baseQuery.Where(filter.IsPlayed.Value ? isPlayedFilter : isPlayedFilter.Not());
         }
@@ -761,104 +818,144 @@ public sealed partial class BaseItemRepository
 
         if (!string.IsNullOrWhiteSpace(filter.HasNoAudioTrackWithLanguage))
         {
-            var lang = filter.HasNoAudioTrackWithLanguage;
-            var foldersWithAudio = DescendantQueryHelper.GetFolderIdsMatching(context, new HasMediaStreamType(MediaStreamTypeEntity.Audio, lang));
+            var lang = NormalizeLanguage(filter.HasNoAudioTrackWithLanguage);
+            var undetermined = string.Equals(lang, "und", StringComparison.Ordinal);
+            var criteria = new HasMediaStreamType(MediaStreamTypeEntity.Audio, lang);
+            // A track only an alternate version carries still belongs to the item a caller sees, so the
+            // item's own streams alone do not decide this. Same for every stream filter below.
+            var versionsWithAudio = DescendantQueryHelper.GetPrimaryVersionIdsMatching(context, criteria);
+            var foldersWithAudio = DescendantQueryHelper.GetFolderIdsMatching(context, criteria);
 
             baseQuery = baseQuery
                 .Where(e =>
-                    (!e.IsFolder && !e.MediaStreams!.Any(ms => ms.StreamType == MediaStreamTypeEntity.Audio && ms.Language == lang))
+                    (!e.IsFolder
+                        && !e.MediaStreams!.Any(ms => ms.StreamType == MediaStreamTypeEntity.Audio
+                            && (ms.Language == lang || (undetermined && string.IsNullOrEmpty(ms.Language))))
+                        && !versionsWithAudio.Contains(e.Id))
                     || (e.IsFolder && !foldersWithAudio.Contains(e.Id)));
         }
 
         if (!string.IsNullOrWhiteSpace(filter.HasNoInternalSubtitleTrackWithLanguage))
         {
-            var lang = filter.HasNoInternalSubtitleTrackWithLanguage;
-            var foldersWithSubtitles = DescendantQueryHelper.GetFolderIdsMatching(context, new HasMediaStreamType(MediaStreamTypeEntity.Subtitle, lang, IsExternal: false));
+            var lang = NormalizeLanguage(filter.HasNoInternalSubtitleTrackWithLanguage);
+            var undetermined = string.Equals(lang, "und", StringComparison.Ordinal);
+            var criteria = new HasMediaStreamType(MediaStreamTypeEntity.Subtitle, lang, IsExternal: false);
+            var versionsWithSubtitles = DescendantQueryHelper.GetPrimaryVersionIdsMatching(context, criteria);
+            var foldersWithSubtitles = DescendantQueryHelper.GetFolderIdsMatching(context, criteria);
 
             baseQuery = baseQuery
                 .Where(e =>
-                    (!e.IsFolder && !e.MediaStreams!.Any(ms => ms.StreamType == MediaStreamTypeEntity.Subtitle && !ms.IsExternal && ms.Language == lang))
+                    (!e.IsFolder
+                        && !e.MediaStreams!.Any(ms => ms.StreamType == MediaStreamTypeEntity.Subtitle && !ms.IsExternal
+                            && (ms.Language == lang || (undetermined && string.IsNullOrEmpty(ms.Language))))
+                        && !versionsWithSubtitles.Contains(e.Id))
                     || (e.IsFolder && !foldersWithSubtitles.Contains(e.Id)));
         }
 
         if (!string.IsNullOrWhiteSpace(filter.HasNoExternalSubtitleTrackWithLanguage))
         {
-            var lang = filter.HasNoExternalSubtitleTrackWithLanguage;
-            var foldersWithSubtitles = DescendantQueryHelper.GetFolderIdsMatching(context, new HasMediaStreamType(MediaStreamTypeEntity.Subtitle, lang, IsExternal: true));
+            var lang = NormalizeLanguage(filter.HasNoExternalSubtitleTrackWithLanguage);
+            var undetermined = string.Equals(lang, "und", StringComparison.Ordinal);
+            var criteria = new HasMediaStreamType(MediaStreamTypeEntity.Subtitle, lang, IsExternal: true);
+            var versionsWithSubtitles = DescendantQueryHelper.GetPrimaryVersionIdsMatching(context, criteria);
+            var foldersWithSubtitles = DescendantQueryHelper.GetFolderIdsMatching(context, criteria);
 
             baseQuery = baseQuery
                 .Where(e =>
-                    (!e.IsFolder && !e.MediaStreams!.Any(ms => ms.StreamType == MediaStreamTypeEntity.Subtitle && ms.IsExternal && ms.Language == lang))
+                    (!e.IsFolder
+                        && !e.MediaStreams!.Any(ms => ms.StreamType == MediaStreamTypeEntity.Subtitle && ms.IsExternal
+                            && (ms.Language == lang || (undetermined && string.IsNullOrEmpty(ms.Language))))
+                        && !versionsWithSubtitles.Contains(e.Id))
                     || (e.IsFolder && !foldersWithSubtitles.Contains(e.Id)));
         }
 
         if (!string.IsNullOrWhiteSpace(filter.HasNoSubtitleTrackWithLanguage))
         {
-            var lang = filter.HasNoSubtitleTrackWithLanguage;
-            var foldersWithSubtitles = DescendantQueryHelper.GetFolderIdsMatching(context, new HasMediaStreamType(MediaStreamTypeEntity.Subtitle, lang));
+            var lang = NormalizeLanguage(filter.HasNoSubtitleTrackWithLanguage);
+            var undetermined = string.Equals(lang, "und", StringComparison.Ordinal);
+            var criteria = new HasMediaStreamType(MediaStreamTypeEntity.Subtitle, lang);
+            var versionsWithSubtitles = DescendantQueryHelper.GetPrimaryVersionIdsMatching(context, criteria);
+            var foldersWithSubtitles = DescendantQueryHelper.GetFolderIdsMatching(context, criteria);
 
             baseQuery = baseQuery
                 .Where(e =>
-                    (!e.IsFolder && !e.MediaStreams!.Any(ms => ms.StreamType == MediaStreamTypeEntity.Subtitle && ms.Language == lang))
+                    (!e.IsFolder
+                        && !e.MediaStreams!.Any(ms => ms.StreamType == MediaStreamTypeEntity.Subtitle
+                            && (ms.Language == lang || (undetermined && string.IsNullOrEmpty(ms.Language))))
+                        && !versionsWithSubtitles.Contains(e.Id))
                     || (e.IsFolder && !foldersWithSubtitles.Contains(e.Id)));
         }
 
         if (filter.HasSubtitles.HasValue)
         {
             var hasSubtitles = filter.HasSubtitles.Value;
-            var foldersWithSubtitles = DescendantQueryHelper.GetFolderIdsMatching(context, new HasSubtitles());
+            var criteria = new HasSubtitles();
+            var versionsWithSubtitles = DescendantQueryHelper.GetPrimaryVersionIdsMatching(context, criteria);
+            var foldersWithSubtitles = DescendantQueryHelper.GetFolderIdsMatching(context, criteria);
             if (hasSubtitles)
             {
                 baseQuery = baseQuery
                     .Where(e =>
-                        (!e.IsFolder && e.MediaStreams!.Any(f => f.StreamType == MediaStreamTypeEntity.Subtitle))
+                        (!e.IsFolder && (e.MediaStreams!.Any(f => f.StreamType == MediaStreamTypeEntity.Subtitle)
+                            || versionsWithSubtitles.Contains(e.Id)))
                         || (e.IsFolder && foldersWithSubtitles.Contains(e.Id)));
             }
             else
             {
                 baseQuery = baseQuery
                     .Where(e =>
-                        (!e.IsFolder && !e.MediaStreams!.Any(f => f.StreamType == MediaStreamTypeEntity.Subtitle))
+                        (!e.IsFolder && !e.MediaStreams!.Any(f => f.StreamType == MediaStreamTypeEntity.Subtitle)
+                            && !versionsWithSubtitles.Contains(e.Id))
                         || (e.IsFolder && !foldersWithSubtitles.Contains(e.Id)));
             }
         }
 
         if (filter.SubtitleLanguages.Count > 0)
         {
-            var foldersWithSubtitles = DescendantQueryHelper.GetFolderIdsMatching(context, new HasMediaStreamType(MediaStreamTypeEntity.Subtitle, filter.SubtitleLanguages));
+            var criteria = new HasMediaStreamType(MediaStreamTypeEntity.Subtitle, filter.SubtitleLanguages);
+            var versionsWithSubtitles = DescendantQueryHelper.GetPrimaryVersionIdsMatching(context, criteria);
+            var foldersWithSubtitles = DescendantQueryHelper.GetFolderIdsMatching(context, criteria);
             baseQuery = baseQuery
                 .Where(e =>
-                    (!e.IsFolder && e.MediaStreams!.Any(f => f.StreamType == MediaStreamTypeEntity.Subtitle
-                     && (filter.SubtitleLanguages.Contains(f.Language) || (filter.SubtitleLanguages.Contains("und") && string.IsNullOrEmpty(f.Language)))))
+                    (!e.IsFolder && (e.MediaStreams!.Any(f => f.StreamType == MediaStreamTypeEntity.Subtitle
+                        && (filter.SubtitleLanguages.Contains(f.Language) || (filter.SubtitleLanguages.Contains("und") && string.IsNullOrEmpty(f.Language))))
+                        || versionsWithSubtitles.Contains(e.Id)))
                     || (e.IsFolder && foldersWithSubtitles.Contains(e.Id)));
         }
 
         if (filter.AudioLanguages.Count > 0)
         {
-            var foldersWithAudio = DescendantQueryHelper.GetFolderIdsMatching(context, new HasMediaStreamType(MediaStreamTypeEntity.Audio, filter.AudioLanguages));
+            var criteria = new HasMediaStreamType(MediaStreamTypeEntity.Audio, filter.AudioLanguages);
+            var versionsWithAudio = DescendantQueryHelper.GetPrimaryVersionIdsMatching(context, criteria);
+            var foldersWithAudio = DescendantQueryHelper.GetFolderIdsMatching(context, criteria);
             baseQuery = baseQuery
                 .Where(e =>
-                    (!e.IsFolder && e.MediaStreams!.Any(f => f.StreamType == MediaStreamTypeEntity.Audio
-                     && (filter.AudioLanguages.Contains(f.Language) || (filter.AudioLanguages.Contains("und") && string.IsNullOrEmpty(f.Language)))))
+                    (!e.IsFolder && (e.MediaStreams!.Any(f => f.StreamType == MediaStreamTypeEntity.Audio
+                        && (filter.AudioLanguages.Contains(f.Language) || (filter.AudioLanguages.Contains("und") && string.IsNullOrEmpty(f.Language))))
+                        || versionsWithAudio.Contains(e.Id)))
                     || (e.IsFolder && foldersWithAudio.Contains(e.Id)));
         }
 
         if (filter.HasChapterImages.HasValue)
         {
             var hasChapterImages = filter.HasChapterImages.Value;
-            var foldersWithChapterImages = DescendantQueryHelper.GetFolderIdsMatching(context, new HasChapterImages());
+            var criteria = new HasChapterImages();
+            var versionsWithChapterImages = DescendantQueryHelper.GetPrimaryVersionIdsMatching(context, criteria);
+            var foldersWithChapterImages = DescendantQueryHelper.GetFolderIdsMatching(context, criteria);
             if (hasChapterImages)
             {
                 baseQuery = baseQuery
                     .Where(e =>
-                        (!e.IsFolder && e.Chapters!.Any(f => f.ImagePath != null))
+                        (!e.IsFolder && (e.Chapters!.Any(f => f.ImagePath != null)
+                            || versionsWithChapterImages.Contains(e.Id)))
                         || (e.IsFolder && foldersWithChapterImages.Contains(e.Id)));
             }
             else
             {
                 baseQuery = baseQuery
                     .Where(e =>
-                        (!e.IsFolder && !e.Chapters!.Any(f => f.ImagePath != null))
+                        (!e.IsFolder && !e.Chapters!.Any(f => f.ImagePath != null)
+                            && !versionsWithChapterImages.Contains(e.Id))
                         || (e.IsFolder && !foldersWithChapterImages.Contains(e.Id)));
             }
         }
@@ -994,6 +1091,12 @@ public sealed partial class BaseItemRepository
             baseQuery = baseQuery.Where(e => e.Parents!.AsQueryable().Any(ancestorFilter));
         }
 
+        if (filter.DescendantOfId.HasValue)
+        {
+            var descendantIds = DescendantQueryHelper.GetAllDescendantIds(context, filter.DescendantOfId.Value);
+            baseQuery = baseQuery.Where(e => descendantIds.Contains(e.Id));
+        }
+
         if (filter.LinkedChildAncestorIds.Length > 0)
         {
             // Keep folder-like items (BoxSets, Playlists) whose linked children descend from any of the requested ancestor ids.

Jellyfin.Server.Implementations/Item/ItemCountService.cs

@@ -249,30 +249,72 @@ public class ItemCountService : IItemCountService
             }
         }
 
+        if (kind is BaseItemKind.Studio or BaseItemKind.Genre or BaseItemKind.MusicGenre
+            && relatedItemKinds.Contains(BaseItemKind.Episode)
+            && relatedItemKinds.Contains(BaseItemKind.Series))
+        {
+            var rolledUpEpisodeCount = CountEpisodesOfTaggedSeries(context, baseQuery, accessFilter, out var directEpisodeCount);
+            totalCount += rolledUpEpisodeCount - result.EpisodeCount + directEpisodeCount;
+            result.EpisodeCount = rolledUpEpisodeCount + directEpisodeCount;
+        }
+
         result.ItemCount = totalCount;
 
         return result;
     }
 
+    private int CountEpisodesOfTaggedSeries(
+        JellyfinDbContext context,
+        IQueryable<BaseItemEntity> taggedItems,
+        InternalItemsQuery accessFilter,
+        out int unrelatedEpisodeCount)
+    {
+        var seriesTypeName = _itemTypeLookup.BaseItemKindNames[BaseItemKind.Series];
+        var episodeTypeName = _itemTypeLookup.BaseItemKindNames[BaseItemKind.Episode];
+
+        var taggedSeriesIds = taggedItems.Where(e => e.Type == seriesTypeName).Select(e => e.Id);
+        unrelatedEpisodeCount = taggedItems.Count(e => e.Type == episodeTypeName
+            && (e.SeriesId == null || !taggedSeriesIds.Contains(e.SeriesId.Value)));
+
+        // Materialised so the episode count drives off IX_BaseItems_SeriesId.
+        var seriesIds = taggedItems
+            .Where(e => e.Type == seriesTypeName)
+            .Select(e => e.Id)
+            .ToArray();
+
+        if (seriesIds.Length == 0)
+        {
+            return 0;
+        }
+
+        var episodes = context.BaseItems.AsNoTracking()
+            .Where(e => e.Type == episodeTypeName && e.SeriesId != null)
+            .WhereOneOrMany(seriesIds, e => e.SeriesId!.Value);
+
+        return _queryHelpers.ApplyAccessFiltering(context, episodes, accessFilter).Count();
+    }
+
     private static IQueryable<BaseItemEntity> ItemsById(JellyfinDbContext context, IQueryable<Guid> itemIds)
         => context.BaseItems.AsNoTracking().Where(e => itemIds.Contains(e.Id));
 
     /// <inheritdoc/>
     public int GetPlayedCount(InternalItemsQuery filter, Guid ancestorId)
     {
+        ArgumentNullException.ThrowIfNull(filter);
         ArgumentNullException.ThrowIfNull(filter.User);
         using var dbContext = _dbProvider.CreateDbContext();
 
-        var baseQuery = _queryHelpers.BuildAccessFilteredDescendantsQuery(dbContext, filter, ancestorId);
+        var baseQuery = BuildGroupedDescendantsQuery(dbContext, filter, ancestorId);
         return baseQuery.Count(b => b.UserData!.Any(u => u.UserId == filter.User.Id && u.Played));
     }
 
     /// <inheritdoc/>
     public int GetTotalCount(InternalItemsQuery filter, Guid ancestorId)
     {
+        ArgumentNullException.ThrowIfNull(filter);
         using var dbContext = _dbProvider.CreateDbContext();
 
-        var baseQuery = _queryHelpers.BuildAccessFilteredDescendantsQuery(dbContext, filter, ancestorId);
+        var baseQuery = BuildGroupedDescendantsQuery(dbContext, filter, ancestorId);
         return baseQuery.Count();
     }
 
@@ -283,10 +325,23 @@ public class ItemCountService : IItemCountService
         ArgumentNullException.ThrowIfNull(filter.User);
         using var dbContext = _dbProvider.CreateDbContext();
 
-        var baseQuery = _queryHelpers.BuildAccessFilteredDescendantsQuery(dbContext, filter, ancestorId);
+        var baseQuery = BuildGroupedDescendantsQuery(dbContext, filter, ancestorId);
         return GetPlayedAndTotalCountFromQuery(baseQuery, filter.User.Id);
     }
 
+    private IQueryable<BaseItemEntity> BuildGroupedDescendantsQuery(JellyfinDbContext dbContext, InternalItemsQuery filter, Guid ancestorId)
+    {
+        var ancestorIds = GetPresentationKeyGroups(dbContext, [ancestorId])[ancestorId];
+        var descendantIds = DescendantQueryHelper.GetAllDescendantIdsBatch(dbContext, ancestorIds).ToArray();
+
+        var baseQuery = dbContext.BaseItems
+            .AsNoTracking()
+            .WhereOneOrMany(descendantIds, b => b.Id)
+            .Where(DescendantQueryHelper.IsCountableLeaf);
+
+        return _queryHelpers.ApplyAccessFiltering(dbContext, baseQuery, filter);
+    }
+
     /// <inheritdoc/>
     public (int Played, int Total) GetPlayedAndTotalCountFromLinkedChildren(InternalItemsQuery filter, Guid parentId)
     {
@@ -294,9 +349,9 @@ public class ItemCountService : IItemCountService
         ArgumentNullException.ThrowIfNull(filter.User);
         using var dbContext = _dbProvider.CreateDbContext();
 
-        var allDescendantIds = DescendantQueryHelper.GetAllDescendantIds(dbContext, parentId);
+        var allDescendantIds = DescendantQueryHelper.GetAllDescendantIdsBatch(dbContext, [parentId]).ToArray();
         var baseQuery = dbContext.BaseItems
-            .Where(b => allDescendantIds.Contains(b.Id))
+            .WhereOneOrMany(allDescendantIds, b => b.Id)
             .Where(DescendantQueryHelper.IsCountableLeaf);
         baseQuery = _queryHelpers.ApplyAccessFiltering(dbContext, baseQuery, filter);
 
@@ -304,7 +359,7 @@ public class ItemCountService : IItemCountService
     }
 
     /// <inheritdoc/>
-    public Dictionary<Guid, int> GetChildCountBatch(IReadOnlyList<Guid> parentIds, Guid? userId)
+    public Dictionary<Guid, int> GetChildCountBatch(IReadOnlyList<Guid> parentIds, User? user)
     {
         ArgumentNullException.ThrowIfNull(parentIds);
 
@@ -317,22 +372,44 @@ public class ItemCountService : IItemCountService
 
         var parentIdsArray = parentIds.ToArray();
 
+        var includeVirtual = user is null || user.DisplayMissingEpisodes;
+
         var hierarchicalCounts = dbContext.BaseItems
-            .Where(b => b.ParentId.HasValue && parentIdsArray.Contains(b.ParentId.Value))
+            .Where(b => b.ParentId.HasValue && !b.SeasonId.HasValue && (includeVirtual || !b.IsVirtualItem))
+            .WhereOneOrMany(parentIdsArray, b => b.ParentId!.Value)
             .GroupBy(b => b.ParentId!.Value)
             .Select(g => new { ParentId = g.Key, Count = g.Count() })
             .ToDictionary(x => x.ParentId, x => x.Count);
 
+        // An episode is a child of its season even when it is not stored under one: with a flat
+        // structure ParentId points at the series, so counting by ParentId alone leaves the season
+        // empty and counts its episodes towards the series instead.
+        var seasonCounts = dbContext.BaseItems
+            .Where(b => b.SeasonId.HasValue && (includeVirtual || !b.IsVirtualItem))
+            .WhereOneOrMany(parentIdsArray, b => b.SeasonId!.Value)
+            .GroupBy(b => b.SeasonId!.Value)
+            .Select(g => new { SeasonId = g.Key, Count = g.Count() })
+            .ToDictionary(x => x.SeasonId, x => x.Count);
+
         var linkedCounts = dbContext.LinkedChildren
-            .Where(lc => parentIdsArray.Contains(lc.ParentId))
+            .WhereOneOrMany(parentIdsArray, lc => lc.ParentId)
             .GroupBy(lc => lc.ParentId)
             .Select(g => new { ParentId = g.Key, Count = g.Count() })
             .ToDictionary(x => x.ParentId, x => x.Count);
 
+        var mergedChildCounts = GetMergedChildCounts(dbContext, parentIdsArray, includeVirtual);
+
         var result = new Dictionary<Guid, int>();
         foreach (var parentId in parentIds)
         {
-            var hierarchicalCount = hierarchicalCounts.GetValueOrDefault(parentId, 0);
+            if (mergedChildCounts.TryGetValue(parentId, out var mergedCount))
+            {
+                result[parentId] = mergedCount;
+                continue;
+            }
+
+            var hierarchicalCount = hierarchicalCounts.GetValueOrDefault(parentId, 0)
+                + seasonCounts.GetValueOrDefault(parentId, 0);
             var linkedCount = linkedCounts.GetValueOrDefault(parentId, 0);
 
             result[parentId] = linkedCount > 0 ? linkedCount : hierarchicalCount;
@@ -341,6 +418,56 @@ public class ItemCountService : IItemCountService
         return result;
     }
 
+    private static Dictionary<Guid, int> GetMergedChildCounts(JellyfinDbContext dbContext, IReadOnlyList<Guid> parentIds, bool includeVirtual)
+    {
+        var mergedGroups = GetPresentationKeyGroups(dbContext, parentIds)
+            .Where(group => group.Value.Count > 1)
+            .ToArray();
+
+        if (mergedGroups.Length == 0)
+        {
+            return [];
+        }
+
+        // Only merged folders.
+        var memberIds = mergedGroups.SelectMany(group => group.Value).Distinct().ToArray();
+        var children = dbContext.BaseItems
+            .AsNoTracking()
+            .Where(b => b.ParentId.HasValue && !b.SeasonId.HasValue && (includeVirtual || !b.IsVirtualItem))
+            .WhereOneOrMany(memberIds, b => b.ParentId!.Value)
+            .Select(b => new { ParentId = b.ParentId!.Value, b.Id, b.PresentationUniqueKey })
+            .ToArray()
+            .Concat(dbContext.BaseItems
+                .AsNoTracking()
+                .Where(b => b.SeasonId.HasValue && (includeVirtual || !b.IsVirtualItem))
+                .WhereOneOrMany(memberIds, b => b.SeasonId!.Value)
+                .Select(b => new { ParentId = b.SeasonId!.Value, b.Id, b.PresentationUniqueKey })
+                .ToArray())
+            .GroupBy(b => b.ParentId)
+            .ToDictionary(
+                g => g.Key,
+                g => g.Select(b => string.IsNullOrEmpty(b.PresentationUniqueKey)
+                    ? b.Id.ToString("N", CultureInfo.InvariantCulture)
+                    : b.PresentationUniqueKey).ToArray());
+
+        var result = new Dictionary<Guid, int>();
+        foreach (var (parentId, members) in mergedGroups)
+        {
+            var childKeys = new HashSet<string>(StringComparer.Ordinal);
+            foreach (var member in members)
+            {
+                if (children.TryGetValue(member, out var keys))
+                {
+                    childKeys.UnionWith(keys);
+                }
+            }
+
+            result[parentId] = childKeys.Count;
+        }
+
+        return result;
+    }
+
     /// <inheritdoc/>
     public Dictionary<Guid, (int Played, int Total)> GetPlayedAndTotalCountBatch(IReadOnlyList<Guid> folderIds, User user)
     {
@@ -353,10 +480,13 @@ public class ItemCountService : IItemCountService
         }
 
         using var dbContext = _dbProvider.CreateDbContext();
-        var folderIdsArray = folderIds.ToArray();
         var filter = new InternalItemsQuery(user);
         var userId = user.Id;
 
+        // Merged series and seasons are stored as one row per folder-item sharing a presentation key.
+        var groups = GetPresentationKeyGroups(dbContext, folderIds);
+        var folderIdsArray = groups.Values.SelectMany(members => members).Distinct().ToArray();
+
         var leafItems = dbContext.BaseItems
             .Where(DescendantQueryHelper.IsCountableLeaf);
         leafItems = _queryHelpers.ApplyAccessFiltering(dbContext, leafItems, filter);
@@ -398,7 +528,7 @@ public class ItemCountService : IItemCountService
                 b => b.Id,
                 (x, b) => new { FolderId = x.ParentId, b.Id, b.Played });
 
-        var results = ancestorLeaves
+        var countsByFolder = ancestorLeaves
             .Union(linkedLeaves)
             .Union(linkedFolderLeaves)
             .GroupBy(x => x.FolderId)
@@ -410,9 +540,73 @@ public class ItemCountService : IItemCountService
             })
             .ToDictionary(x => x.FolderId, x => (x.Played, x.Total));
 
+        var results = new Dictionary<Guid, (int Played, int Total)>();
+        foreach (var (folderId, members) in groups)
+        {
+            var played = 0;
+            var total = 0;
+
+            // Members of a group are distinct folders, so their leaves cannot overlap.
+            foreach (var member in members)
+            {
+                if (countsByFolder.TryGetValue(member, out var counts))
+                {
+                    played += counts.Played;
+                    total += counts.Total;
+                }
+            }
+
+            if (total > 0 || played > 0)
+            {
+                results[folderId] = (played, total);
+            }
+        }
+
         return results;
     }
 
+    private static Dictionary<Guid, List<Guid>> GetPresentationKeyGroups(JellyfinDbContext dbContext, IReadOnlyList<Guid> folderIds)
+    {
+        var requested = dbContext.BaseItems
+            .AsNoTracking()
+            .WhereOneOrMany(folderIds, e => e.Id)
+            .Select(e => new { e.Id, e.PresentationUniqueKey })
+            .ToArray();
+
+        var keys = requested
+            .Select(e => e.PresentationUniqueKey)
+            .Where(key => !string.IsNullOrEmpty(key))
+            .Distinct(StringComparer.Ordinal)
+            .ToArray();
+
+        // Every item that is not merged carries a key derived from its own id, so in the common case
+        // each group resolves back to the single folder that was asked for.
+        var membersByKey = keys.Length == 0
+            ? []
+            : dbContext.BaseItems
+                .AsNoTracking()
+                .Where(e => e.IsFolder)
+                .WhereOneOrMany(keys, e => e.PresentationUniqueKey!)
+                .Select(e => new { e.Id, Key = e.PresentationUniqueKey! })
+                .ToArray()
+                .GroupBy(e => e.Key, StringComparer.Ordinal)
+                .ToDictionary(g => g.Key, g => g.Select(e => e.Id).ToList(), StringComparer.Ordinal);
+
+        var keyById = requested.ToDictionary(e => e.Id, e => e.PresentationUniqueKey);
+        var groups = new Dictionary<Guid, List<Guid>>();
+        foreach (var folderId in folderIds)
+        {
+            groups[folderId] = keyById.TryGetValue(folderId, out var key)
+                && !string.IsNullOrEmpty(key)
+                && membersByKey.TryGetValue(key, out var members)
+                && members.Count > 0
+                    ? members
+                    : [folderId];
+        }
+
+        return groups;
+    }
+
     private static (int Played, int Total) GetPlayedAndTotalCountFromQuery(IQueryable<BaseItemEntity> query, Guid userId)
     {
         var result = query

Jellyfin.Server.Implementations/Item/ItemPersistenceService.cs

@@ -538,7 +538,7 @@ public class ItemPersistenceService : IItemPersistenceService
                 var childIdsToCheck = resolvedChildren.Select(c => c.ChildId).Distinct().ToList();
                 var existingChildIds = childIdsToCheck.Count > 0
                     ? context.BaseItems
-                        .Where(e => childIdsToCheck.Contains(e.Id))
+                        .WhereOneOrMany(childIdsToCheck, e => e.Id)
                         .Select(e => e.Id)
                         .ToHashSet()
                     : [];

Jellyfin.Server.Implementations/Item/LinkedChildrenService.cs

@@ -7,6 +7,7 @@ using System.Collections.Generic;
 using System.Linq;
 using Jellyfin.Data.Enums;
 using Jellyfin.Database.Implementations;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Entities.Audio;
 using MediaBrowser.Controller.Persistence;
 using Microsoft.EntityFrameworkCore;
@@ -83,26 +84,27 @@ public class LinkedChildrenService : ILinkedChildrenService
     {
         using var dbContext = _dbProvider.CreateDbContext();
 
-        var lowerNames = artistNames.Select(n => n.ToLowerInvariant()).ToArray();
+        var cleanNames = artistNames.Select(n => (Original: n, Clean: n.GetCleanValue())).ToArray();
+        var cleanValues = cleanNames.Select(x => x.Clean).ToArray();
+
         var artists = dbContext.BaseItems
             .AsNoTracking()
             .Where(e => e.Type == _itemTypeLookup.BaseItemKindNames[BaseItemKind.MusicArtist]!)
-            .Where(e => lowerNames.Contains(e.Name!.ToLower()))
+            .Where(e => cleanValues.Contains(e.CleanName))
             .ToArray();
 
         var lookup = artists
-            .GroupBy(e => e.Name!, StringComparer.OrdinalIgnoreCase)
+            .GroupBy(e => e.CleanName!)
             .ToDictionary(
                 g => g.Key,
-                g => g.Select(f => _queryHelpers.DeserializeBaseItem(f)).Where(dto => dto is not null).Cast<MusicArtist>().ToArray(),
-                StringComparer.OrdinalIgnoreCase);
+                g => g.Select(f => _queryHelpers.DeserializeBaseItem(f)).Where(dto => dto is not null).Cast<MusicArtist>().ToArray());
 
-        var result = new Dictionary<string, MusicArtist[]>(artistNames.Count);
-        foreach (var name in artistNames)
+        var result = new Dictionary<string, MusicArtist[]>(cleanNames.Length);
+        foreach (var (original, clean) in cleanNames)
         {
-            if (lookup.TryGetValue(name, out var artistArray))
+            if (lookup.TryGetValue(clean, out var artistArray))
             {
-                result[name] = artistArray;
+                result[original] = artistArray;
             }
         }
 

Jellyfin.Server.Implementations/Item/PeopleRepository.cs

@@ -194,12 +194,44 @@ public class PeopleRepository(IDbContextFactory<JellyfinDbContext> dbProvider, I
             listOrder++;
         }
 
+        var droppedCredits = existingMaps.Select(e => e.PeopleId).Distinct().ToArray();
         context.PeopleBaseItemMap.RemoveRange(existingMaps);
 
+        context.SaveChanges();
+
+        // Nothing else ever deletes a credit row, so one left without a single mapping outlives the
+        // credit it stood for: it keeps a person of that name off the dead-person sweep, which only
+        // sees items no credit names, and keeps the name in every by-name list. That is how a credit
+        // a provider dropped, or one a broken provider result invented, becomes impossible to clean up.
+        DeleteCreditsWithoutMapping(context, droppedCredits);
+
         context.SaveChanges();
         transaction.Commit();
     }
 
+    /// <inheritdoc/>
+    public int DeleteOrphanedCredits()
+    {
+        using var context = _dbProvider.CreateDbContext();
+
+        return DeleteCreditsWithoutMapping(context, null);
+    }
+
+    // A null candidate list sweeps every credit, anything else only the ones just unmapped.
+    private int DeleteCreditsWithoutMapping(JellyfinDbContext context, IReadOnlyList<Guid>? candidates)
+    {
+        if (candidates is not null && candidates.Count == 0)
+        {
+            return 0;
+        }
+
+        var credits = candidates is null
+            ? context.Peoples.AsQueryable()
+            : context.Peoples.WhereOneOrMany(candidates, e => e.Id);
+
+        return credits.Where(e => !context.PeopleBaseItemMap.Any(f => f.PeopleId == e.Id)).ExecuteDelete();
+    }
+
     /// <inheritdoc/>
     public IReadOnlyDictionary<Guid, IReadOnlyList<string>> GetPeopleNamesByItems(IReadOnlyList<Guid> itemIds, IReadOnlyList<string> personTypes)
     {
@@ -351,7 +383,11 @@ public class PeopleRepository(IDbContextFactory<JellyfinDbContext> dbProvider, I
 
         if (!filter.ItemId.IsEmpty())
         {
-            query = query.Where(e => e.BaseItems!.Any(w => w.ItemId.Equals(filter.ItemId)));
+            var itemId = filter.ItemId;
+            query = query.Where(e => context.PeopleBaseItemMap
+                .Where(m => m.ItemId.Equals(itemId))
+                .Select(m => m.PeopleId)
+                .Contains(e.Id));
         }
 
         if (filter.ParentId != null)
@@ -361,7 +397,11 @@ public class PeopleRepository(IDbContextFactory<JellyfinDbContext> dbProvider, I
 
         if (!filter.AppearsInItemId.IsEmpty())
         {
-            query = query.Where(e => e.BaseItems!.Any(w => w.ItemId.Equals(filter.AppearsInItemId)));
+            var appearsInItemId = filter.AppearsInItemId;
+            query = query.Where(e => context.PeopleBaseItemMap
+                .Where(m => m.ItemId.Equals(appearsInItemId))
+                .Select(m => m.PeopleId)
+                .Contains(e.Id));
         }
 
         var queryPersonTypes = filter.PersonTypes.Where(IsValidPersonType).ToList();

Jellyfin.Server.Implementations/Users/UserManager.cs

@@ -225,17 +225,8 @@ namespace Jellyfin.Server.Implementations.Users
                         ?? throw new ResourceNotFoundException(nameof(user.Id));
 
                     dbContext.Entry(dbUser).CurrentValues.SetValues(user);
-                    dbUser.Permissions.Clear();
-                    foreach (var permission in user.Permissions)
-                    {
-                        dbUser.Permissions.Add(new Permission(permission.Kind, permission.Value));
-                    }
-
-                    dbUser.Preferences.Clear();
-                    foreach (var preference in user.Preferences)
-                    {
-                        dbUser.Preferences.Add(new Preference(preference.Kind, preference.Value));
-                    }
+                    SyncPermissions(dbUser, user.Permissions);
+                    SyncPreferences(dbUser, user.Preferences);
 
                     dbUser.AccessSchedules.Clear();
                     foreach (var accessSchedule in user.AccessSchedules)
@@ -269,6 +260,60 @@ namespace Jellyfin.Server.Implementations.Users
             }
         }
 
+        private static void SyncPermissions(User dbUser, ICollection<Permission> source)
+        {
+            var incoming = new Dictionary<PermissionKind, bool>();
+            foreach (var permission in source)
+            {
+                incoming[permission.Kind] = permission.Value;
+            }
+
+            foreach (var existing in dbUser.Permissions)
+            {
+                if (incoming.Remove(existing.Kind, out var value))
+                {
+                    // EF only marks the row modified if the value actually differs, so an update that
+                    // touches nothing but the user row - a session activity stamp - writes no children.
+                    existing.Value = value;
+                }
+                else
+                {
+                    dbUser.Permissions.Remove(existing);
+                }
+            }
+
+            foreach (var (kind, value) in incoming)
+            {
+                dbUser.Permissions.Add(new Permission(kind, value));
+            }
+        }
+
+        private static void SyncPreferences(User dbUser, ICollection<Preference> source)
+        {
+            var incoming = new Dictionary<PreferenceKind, string>();
+            foreach (var preference in source)
+            {
+                incoming[preference.Kind] = preference.Value;
+            }
+
+            foreach (var existing in dbUser.Preferences)
+            {
+                if (incoming.Remove(existing.Kind, out var value))
+                {
+                    existing.Value = value;
+                }
+                else
+                {
+                    dbUser.Preferences.Remove(existing);
+                }
+            }
+
+            foreach (var (kind, value) in incoming)
+            {
+                dbUser.Preferences.Add(new Preference(kind, value));
+            }
+        }
+
         internal async Task<User> CreateUserInternalAsync(string name, JellyfinDbContext dbContext)
         {
             // TODO: Remove after user item data is migrated.

Jellyfin.Server/Migrations/Routines/20260113120000_MigrateLinkedChildren.cs

@@ -22,6 +22,11 @@ namespace Jellyfin.Server.Migrations.Routines;
 [JellyfinMigrationBackup(JellyfinDb = true)]
 internal class MigrateLinkedChildren : IDatabaseMigrationRoutine
 {
+    private const int ParseProgressLogStep = 25_000;
+    private const int FileCheckProgressLogStep = 10_000;
+    private const int ResolveProgressLogStep = 10_000;
+    private const int DeleteProgressLogStep = 25;
+
     private readonly ILogger<MigrateLinkedChildren> _logger;
     private readonly IDbContextFactory<JellyfinDbContext> _dbProvider;
     private readonly ILibraryManager _libraryManager;
@@ -85,7 +90,6 @@ internal class MigrateLinkedChildren : IDatabaseMigrationRoutine
         var droppedChildren = 0;
         var linkedChildrenToAdd = new List<LinkedChildEntity>();
         var processedCount = 0;
-        const int progressLogStep = 1000;
         var totalItems = itemsWithData.Count;
 
         foreach (var item in itemsWithData)
@@ -95,7 +99,7 @@ internal class MigrateLinkedChildren : IDatabaseMigrationRoutine
                 continue;
             }
 
-            if (processedCount > 0 && processedCount % progressLogStep == 0)
+            if (processedCount > 0 && processedCount % ParseProgressLogStep == 0)
             {
                 _logger.LogInformation("Processing LinkedChildren: {Processed}/{Total} items", processedCount, totalItems);
             }
@@ -311,11 +315,7 @@ internal class MigrateLinkedChildren : IDatabaseMigrationRoutine
 
         _logger.LogInformation("Found {Count} wrong-type alternate version items to remove.", wrongTypeChildIds.Count);
 
-        var itemsToDelete = wrongTypeChildIds
-            .Select(id => _libraryManager.GetItemById(id))
-            .Where(item => item is not null)
-            .ToList();
-        var deleted = DeleteItems(itemsToDelete!);
+        var deleted = ResolveAndDeleteItems(wrongTypeChildIds, "wrong-type alternate version items");
 
         _logger.LogInformation("Removed {Count} wrong-type alternate version items. They will be recreated with the correct type on next library scan.", deleted);
     }
@@ -342,11 +342,7 @@ internal class MigrateLinkedChildren : IDatabaseMigrationRoutine
 
         _logger.LogInformation("Found {Count} orphaned alternate version BaseItems to remove.", orphanedVersionIds.Count);
 
-        var itemsToDelete = orphanedVersionIds
-            .Select(id => _libraryManager.GetItemById(id))
-            .Where(item => item is not null)
-            .ToList();
-        var deleted = DeleteItems(itemsToDelete!);
+        var deleted = ResolveAndDeleteItems(orphanedVersionIds, "orphaned alternate version BaseItems");
 
         _logger.LogInformation("Removed {Count} orphaned alternate version BaseItems.", deleted);
     }
@@ -371,11 +367,7 @@ internal class MigrateLinkedChildren : IDatabaseMigrationRoutine
 
         _logger.LogInformation("Found {Count} items from deleted libraries to remove.", orphanedIds.Count);
 
-        var itemsToDelete = orphanedIds
-            .Select(id => _libraryManager.GetItemById(id))
-            .Where(item => item is not null)
-            .ToList();
-        var deleted = DeleteItems(itemsToDelete!);
+        var deleted = ResolveAndDeleteItems(orphanedIds, "items from deleted libraries");
 
         _logger.LogInformation("Removed {Count} items from deleted libraries.", deleted);
     }
@@ -427,8 +419,23 @@ internal class MigrateLinkedChildren : IDatabaseMigrationRoutine
         var skippedUnrootedItems = 0;
 
         var staleIds = new List<Guid>();
+        var checkedCount = 0;
+        _logger.LogInformation("Checking {Total} items for missing files.", itemsWithPaths.Count);
+
         foreach (var item in itemsWithPaths)
         {
+            // A miss on offline storage can block for the mount timeout, so report while scanning.
+            if (checkedCount > 0 && checkedCount % FileCheckProgressLogStep == 0)
+            {
+                _logger.LogInformation(
+                    "Checking for missing files: {Checked}/{Total} items, {Stale} stale so far.",
+                    checkedCount,
+                    itemsWithPaths.Count,
+                    staleIds.Count);
+            }
+
+            checkedCount++;
+
             // Expand virtual path placeholders (%AppDataPath%, %MetadataPath%) to real paths
             var path = _appHost.ExpandVirtualPath(item.Path!);
 
@@ -482,16 +489,47 @@ internal class MigrateLinkedChildren : IDatabaseMigrationRoutine
 
         _logger.LogInformation("Found {Count} stale items to remove.", staleIds.Count);
 
-        var itemsToDelete = staleIds
-            .Select(id => _libraryManager.GetItemById(id))
-            .Where(item => item is not null)
-            .ToList();
-        var deleted = DeleteItems(itemsToDelete!);
+        var deleted = ResolveAndDeleteItems(staleIds, "items with missing files");
 
         _logger.LogInformation("Removed {Count} stale items.", deleted);
     }
 
-    private int DeleteItems(IReadOnlyCollection<BaseItem> items)
+    private int ResolveAndDeleteItems(IReadOnlyCollection<Guid> ids, string description)
+    {
+        if (ids.Count == 0)
+        {
+            return 0;
+        }
+
+        return DeleteItems(ResolveItems(ids, description), description);
+    }
+
+    private List<BaseItem> ResolveItems(IReadOnlyCollection<Guid> ids, string description)
+    {
+        // Each lookup is a separate repository read; cached ones are fast, so this only reports
+        // once a set is large enough for the reads to add up to a noticeable stretch.
+        var items = new List<BaseItem>(ids.Count);
+        var processed = 0;
+        foreach (var id in ids)
+        {
+            if (processed > 0 && processed % ResolveProgressLogStep == 0)
+            {
+                _logger.LogInformation("Loading {Description}: {Processed}/{Total} items", description, processed, ids.Count);
+            }
+
+            processed++;
+
+            var item = _libraryManager.GetItemById(id);
+            if (item is not null)
+            {
+                items.Add(item);
+            }
+        }
+
+        return items;
+    }
+
+    private int DeleteItems(IReadOnlyCollection<BaseItem> items, string description)
     {
         if (items.Count == 0)
         {
@@ -500,8 +538,16 @@ internal class MigrateLinkedChildren : IDatabaseMigrationRoutine
 
         var options = new DeleteOptions { DeleteFileLocation = false, DeleteFromExternalProvider = false };
         var deleted = 0;
+        var processed = 0;
         foreach (var item in items)
         {
+            if (processed > 0 && processed % DeleteProgressLogStep == 0)
+            {
+                _logger.LogInformation("Removing {Description}: {Processed}/{Total} items", description, processed, items.Count);
+            }
+
+            processed++;
+
             try
             {
                 _libraryManager.DeleteItem(item, options);

Jellyfin.Server/Migrations/Routines/20260821120000_RecomputeSeriesPresentationKey.cs

@@ -1,5 +1,7 @@
 using System;
+using System.Collections.Generic;
 using System.Diagnostics;
+using System.Globalization;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
@@ -15,9 +17,9 @@ using Microsoft.Extensions.Logging;
 namespace Jellyfin.Server.Migrations.Routines;
 
 /// <summary>
-/// Recomputes the presentation unique key for every series so existing items adopt the folder-set-free key format.
+/// Recomputes the presentation unique key of every series and season so merged series are scoped to their own library.
 /// </summary>
-[JellyfinMigration("2026-07-23T12:00:00", nameof(RecomputeSeriesPresentationKey))]
+[JellyfinMigration("2026-08-21T12:00:00", nameof(RecomputeSeriesPresentationKey))]
 [JellyfinMigrationBackup(JellyfinDb = true)]
 internal class RecomputeSeriesPresentationKey : IAsyncMigrationRoutine
 {
@@ -53,6 +55,7 @@ internal class RecomputeSeriesPresentationKey : IAsyncMigrationRoutine
 
         const int ProgressInterval = 250;
         var sw = Stopwatch.StartNew();
+        var newSeriesKeys = new Dictionary<Guid, string>();
         var processed = 0;
         var updated = 0;
 
@@ -68,9 +71,10 @@ internal class RecomputeSeriesPresentationKey : IAsyncMigrationRoutine
                     _logger.LogInformation("Processed {Processed}/{Total} series - Updated: {Updated} - Time: {Elapsed}", processed, series.Length, updated, sw.Elapsed);
                 }
 
-                var oldKey = item.PresentationUniqueKey;
                 var newKey = item.CreatePresentationUniqueKey();
-                if (string.Equals(oldKey, newKey, StringComparison.Ordinal))
+                newSeriesKeys[item.Id] = newKey;
+
+                if (string.Equals(item.PresentationUniqueKey, newKey, StringComparison.Ordinal))
                 {
                     continue;
                 }
@@ -82,21 +86,66 @@ internal class RecomputeSeriesPresentationKey : IAsyncMigrationRoutine
                     .ExecuteUpdateAsync(e => e.SetProperty(f => f.PresentationUniqueKey, newKey), cancellationToken)
                     .ConfigureAwait(false);
 
-                // Seasons and episodes cache the series key in SeriesPresentationUniqueKey and are matched
-                // to the series by it. Re-point every child still carrying the old key in a single set-based
-                // update so they stay attached without waiting for the next scan.
-                if (!string.IsNullOrEmpty(oldKey))
-                {
-                    await dbContext.BaseItems
-                        .Where(e => e.SeriesPresentationUniqueKey == oldKey)
-                        .ExecuteUpdateAsync(e => e.SetProperty(f => f.SeriesPresentationUniqueKey, newKey), cancellationToken)
-                        .ConfigureAwait(false);
-                }
+                // Seasons and episodes are matched to their series by SeriesPresentationUniqueKey, so
+                // re-point them here instead of waiting for the next scan. Scoped by SeriesId rather than
+                // by the old key: that key can be shared by every library holding the series, so matching
+                // on it would drag the other libraries' children along.
+                await dbContext.BaseItems
+                    .Where(e => e.SeriesId.HasValue && e.SeriesId.Value.Equals(id))
+                    .ExecuteUpdateAsync(e => e.SetProperty(f => f.SeriesPresentationUniqueKey, newKey), cancellationToken)
+                    .ConfigureAwait(false);
 
                 updated++;
             }
+
+            var updatedSeasons = await RecomputeSeasonsAsync(dbContext, newSeriesKeys, cancellationToken).ConfigureAwait(false);
+
+            _logger.LogInformation(
+                "Recomputed presentation unique key for {Updated} of {Count} series and {UpdatedSeasons} seasons in {Elapsed}",
+                updated,
+                series.Length,
+                updatedSeasons,
+                sw.Elapsed);
+        }
+    }
+
+    private async Task<int> RecomputeSeasonsAsync(JellyfinDbContext dbContext, Dictionary<Guid, string> newSeriesKeys, CancellationToken cancellationToken)
+    {
+        // A season's own key embeds its series' key, so it goes stale with it.
+        var seasons = _libraryManager.GetItemList(new InternalItemsQuery
+        {
+            IncludeItemTypes = [BaseItemKind.Season]
+        }).OfType<Season>().ToArray();
+
+        var updated = 0;
+
+        foreach (var season in seasons)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            // Without an index number the season keeps the base key, which carries no series key at all.
+            if (!season.IndexNumber.HasValue
+                || !newSeriesKeys.TryGetValue(season.SeriesId, out var seriesKey))
+            {
+                continue;
+            }
+
+            // Mirrors Season.CreatePresentationUniqueKey.
+            var newKey = seriesKey + "-" + season.IndexNumber.Value.ToString("000", CultureInfo.InvariantCulture);
+            if (string.Equals(season.PresentationUniqueKey, newKey, StringComparison.Ordinal))
+            {
+                continue;
+            }
+
+            var id = season.Id;
+            await dbContext.BaseItems
+                .Where(e => e.Id.Equals(id))
+                .ExecuteUpdateAsync(e => e.SetProperty(f => f.PresentationUniqueKey, newKey), cancellationToken)
+                .ConfigureAwait(false);
+
+            updated++;
         }
 
-        _logger.LogInformation("Recomputed presentation unique key for {Updated} of {Count} series in {Elapsed}", updated, series.Length, sw.Elapsed);
+        return updated;
     }
 }

Jellyfin.Server/Migrations/Routines/20260825200000_ConsolidateLocalizedUserViews.cs

@@ -0,0 +1,334 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Jellyfin.Data.Enums;
+using Jellyfin.Database.Implementations;
+using Jellyfin.Database.Implementations.Entities;
+using Jellyfin.Database.Implementations.Enums;
+using Jellyfin.Server.ServerSetupApp;
+using MediaBrowser.Controller.Configuration;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Model.IO;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging;
+
+namespace Jellyfin.Server.Migrations.Routines;
+
+/// <summary>
+/// Moves the views whose id used to be derived from their localized name onto their name independent id.
+/// </summary>
+[JellyfinMigration("2026-08-25T20:00:00", nameof(ConsolidateLocalizedUserViews))]
+[JellyfinMigrationBackup(JellyfinDb = true)]
+internal class ConsolidateLocalizedUserViews : IAsyncMigrationRoutine
+{
+    private readonly IStartupLogger<ConsolidateLocalizedUserViews> _logger;
+    private readonly ILibraryManager _libraryManager;
+    private readonly IServerConfigurationManager _configurationManager;
+    private readonly IFileSystem _fileSystem;
+    private readonly IDbContextFactory<JellyfinDbContext> _dbProvider;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ConsolidateLocalizedUserViews"/> class.
+    /// </summary>
+    /// <param name="logger">The startup logger.</param>
+    /// <param name="libraryManager">The library manager.</param>
+    /// <param name="configurationManager">The server configuration manager.</param>
+    /// <param name="fileSystem">The file system.</param>
+    /// <param name="dbProvider">The database context factory.</param>
+    public ConsolidateLocalizedUserViews(
+        IStartupLogger<ConsolidateLocalizedUserViews> logger,
+        ILibraryManager libraryManager,
+        IServerConfigurationManager configurationManager,
+        IFileSystem fileSystem,
+        IDbContextFactory<JellyfinDbContext> dbProvider)
+    {
+        _logger = logger;
+        _libraryManager = libraryManager;
+        _configurationManager = configurationManager;
+        _fileSystem = fileSystem;
+        _dbProvider = dbProvider;
+    }
+
+    /// <inheritdoc />
+    public async Task PerformAsync(CancellationToken cancellationToken)
+    {
+        // The Live TV view is the one that hurts: every channel and program is parented to it, so a
+        // translation update or a change of UI culture used to leave them behind under a view nothing
+        // looks up any more.
+        var views = _libraryManager.GetItemList(new InternalItemsQuery
+        {
+            IncludeItemTypes = [BaseItemKind.UserView]
+        }).OfType<UserView>().Where(view => view.ViewType.HasValue).ToArray();
+
+        if (views.Length == 0)
+        {
+            return;
+        }
+
+        var dbContext = await _dbProvider.CreateDbContextAsync(cancellationToken).ConfigureAwait(false);
+        await using (dbContext.ConfigureAwait(false))
+        {
+            foreach (var group in views.GroupBy(view => view.ViewType!.Value))
+            {
+                cancellationToken.ThrowIfCancellationRequested();
+
+                var viewType = group.Key;
+                var folderName = _fileSystem.GetValidFilename(viewType.ToString());
+                var path = Path.Combine(_configurationManager.ApplicationPaths.InternalMetadataPath, "views", folderName);
+
+                // Only the views created for a view type as a whole are named after it. The per user and
+                // per parent ones get a folder of their own, and carry no children to lose. Match on the
+                // folder rather than the whole path so a metadata directory that has since moved still
+                // lines up.
+                var candidates = group
+                    .Where(view => !string.IsNullOrEmpty(view.Path)
+                        && string.Equals(Path.GetFileName(view.Path.TrimEnd(Path.DirectorySeparatorChar)), folderName, StringComparison.OrdinalIgnoreCase))
+                    .ToArray();
+                if (candidates.Length == 0)
+                {
+                    continue;
+                }
+
+                // Mirrors LibraryManager.GetNamedView(name, viewType, sortName).
+                var canonicalId = _libraryManager.GetNewItemId(path + "_namedview_" + viewType.ToString(), typeof(UserView));
+
+                var stale = candidates.Where(view => !view.Id.Equals(canonicalId)).ToArray();
+                if (stale.Length == 0)
+                {
+                    continue;
+                }
+
+                await ConsolidateAsync(dbContext, viewType, path, canonicalId, candidates, stale, cancellationToken).ConfigureAwait(false);
+            }
+        }
+    }
+
+    private async Task ConsolidateAsync(
+        JellyfinDbContext dbContext,
+        CollectionType viewType,
+        string path,
+        Guid canonicalId,
+        IReadOnlyList<UserView> candidates,
+        IReadOnlyList<UserView> stale,
+        CancellationToken cancellationToken)
+    {
+        var staleIds = stale.Select(view => view.Id).ToArray();
+        Guid? newParentId = canonicalId;
+        var sourceId = Guid.Empty;
+
+        if (!candidates.Any(view => view.Id.Equals(canonicalId)))
+        {
+            // Whichever of the old views the items ended up under is the one worth keeping, so give the
+            // canonical id a copy of it.
+            var source = await PickSourceAsync(dbContext, stale, staleIds, cancellationToken).ConfigureAwait(false);
+            sourceId = source.Id;
+
+            _libraryManager.CreateItem(
+                new UserView
+                {
+                    Path = path,
+                    Id = canonicalId,
+                    DateCreated = source.DateCreated,
+                    DateModified = source.DateModified,
+                    Name = source.Name,
+                    ViewType = viewType,
+                    ForcedSortName = source.ForcedSortName
+                },
+                null);
+        }
+
+        var reparented = await dbContext.BaseItems
+            .Where(e => e.ParentId.HasValue)
+            .WhereOneOrMany(staleIds, e => e.ParentId!.Value)
+            .ExecuteUpdateAsync(e => e.SetProperty(f => f.ParentId, newParentId), cancellationToken)
+            .ConfigureAwait(false);
+
+        await dbContext.BaseItems
+            .Where(e => e.TopParentId.HasValue)
+            .WhereOneOrMany(staleIds, e => e.TopParentId!.Value)
+            .ExecuteUpdateAsync(e => e.SetProperty(f => f.TopParentId, newParentId), cancellationToken)
+            .ConfigureAwait(false);
+
+        await MoveAncestorsAsync(dbContext, canonicalId, staleIds, cancellationToken).ConfigureAwait(false);
+        await MoveUserSettingsAsync(dbContext, canonicalId, sourceId, staleIds, cancellationToken).ConfigureAwait(false);
+
+        // Nothing points at them any more, and BaseItems cascades on ParentId, so this has to come last.
+        await dbContext.BaseItems
+            .WhereOneOrMany(staleIds, e => e.Id)
+            .ExecuteDeleteAsync(cancellationToken)
+            .ConfigureAwait(false);
+
+        _logger.LogInformation(
+            "Moved {Reparented} items and dropped {Stale} stale {ViewType} views in favour of {CanonicalId}",
+            reparented,
+            staleIds.Length,
+            viewType,
+            canonicalId);
+    }
+
+    private async Task<UserView> PickSourceAsync(
+        JellyfinDbContext dbContext,
+        IReadOnlyList<UserView> stale,
+        IReadOnlyList<Guid> staleIds,
+        CancellationToken cancellationToken)
+    {
+        var childCounts = await dbContext.BaseItems
+            .Where(e => e.ParentId.HasValue)
+            .WhereOneOrMany(staleIds, e => e.ParentId!.Value)
+            .GroupBy(e => e.ParentId!.Value)
+            .Select(g => new { ParentId = g.Key, Count = g.Count() })
+            .ToDictionaryAsync(e => e.ParentId, e => e.Count, cancellationToken)
+            .ConfigureAwait(false);
+
+        return stale
+            .OrderByDescending(view => childCounts.GetValueOrDefault(view.Id))
+            .ThenBy(view => view.DateCreated)
+            .First();
+    }
+
+    private static async Task MoveUserSettingsAsync(
+        JellyfinDbContext dbContext,
+        Guid canonicalId,
+        Guid sourceId,
+        IReadOnlyList<Guid> staleIds,
+        CancellationToken cancellationToken)
+    {
+        // Everything below is keyed by the view's id, and a view holding no children still holds the
+        // ordering it was given and whether it was hidden. Only the view that was promoted can hand
+        // those over - the rest would collide on the one row per user, item and client - so the others
+        // are dropped instead.
+        var dropped = staleIds.Where(id => !id.Equals(sourceId)).ToArray();
+
+        if (!sourceId.Equals(Guid.Empty))
+        {
+            var moved = new[] { sourceId };
+
+            await dbContext.DisplayPreferences
+                .WhereOneOrMany(moved, e => e.ItemId)
+                .ExecuteUpdateAsync(e => e.SetProperty(f => f.ItemId, canonicalId), cancellationToken)
+                .ConfigureAwait(false);
+
+            await dbContext.ItemDisplayPreferences
+                .WhereOneOrMany(moved, e => e.ItemId)
+                .ExecuteUpdateAsync(e => e.SetProperty(f => f.ItemId, canonicalId), cancellationToken)
+                .ConfigureAwait(false);
+
+            await dbContext.CustomItemDisplayPreferences
+                .WhereOneOrMany(moved, e => e.ItemId)
+                .ExecuteUpdateAsync(e => e.SetProperty(f => f.ItemId, canonicalId), cancellationToken)
+                .ConfigureAwait(false);
+        }
+
+        if (dropped.Length > 0)
+        {
+            await dbContext.DisplayPreferences.WhereOneOrMany(dropped, e => e.ItemId).ExecuteDeleteAsync(cancellationToken).ConfigureAwait(false);
+            await dbContext.ItemDisplayPreferences.WhereOneOrMany(dropped, e => e.ItemId).ExecuteDeleteAsync(cancellationToken).ConfigureAwait(false);
+            await dbContext.CustomItemDisplayPreferences.WhereOneOrMany(dropped, e => e.ItemId).ExecuteDeleteAsync(cancellationToken).ConfigureAwait(false);
+        }
+
+        var stale = staleIds.ToHashSet();
+        var preferences = await dbContext.Preferences
+            .Where(e => e.Kind == PreferenceKind.OrderedViews || e.Kind == PreferenceKind.MyMediaExcludes)
+            .ToListAsync(cancellationToken)
+            .ConfigureAwait(false);
+
+        var changed = false;
+
+        foreach (var preference in preferences)
+        {
+            var values = preference.Value.Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
+            var rewritten = new List<string>(values.Length);
+            var seen = new HashSet<Guid>();
+            var touched = false;
+
+            foreach (var value in values)
+            {
+                // Clients write these in both the dashed and the plain form, so compare them parsed.
+                if (!Guid.TryParse(value, out var parsed))
+                {
+                    rewritten.Add(value);
+                    continue;
+                }
+
+                var isStale = stale.Contains(parsed);
+                if (isStale)
+                {
+                    parsed = canonicalId;
+                    touched = true;
+                }
+
+                // The same view can be listed twice once both of its ids point at the same place.
+                if (!seen.Add(parsed))
+                {
+                    continue;
+                }
+
+                rewritten.Add(isStale
+                    ? parsed.ToString(value.Contains('-', StringComparison.Ordinal) ? "D" : "N", CultureInfo.InvariantCulture)
+                    : value);
+            }
+
+            if (!touched)
+            {
+                continue;
+            }
+
+            preference.Value = string.Join(',', rewritten);
+            changed = true;
+        }
+
+        if (changed)
+        {
+            await dbContext.SaveChangesAsync(cancellationToken).ConfigureAwait(false);
+        }
+    }
+
+    private static async Task MoveAncestorsAsync(
+        JellyfinDbContext dbContext,
+        Guid canonicalId,
+        IReadOnlyList<Guid> staleIds,
+        CancellationToken cancellationToken)
+    {
+        var items = await dbContext.AncestorIds
+            .WhereOneOrMany(staleIds, e => e.ParentItemId)
+            .Select(e => e.ItemId)
+            .Distinct()
+            .ToListAsync(cancellationToken)
+            .ConfigureAwait(false);
+
+        await dbContext.AncestorIds
+            .WhereOneOrMany(staleIds, e => e.ParentItemId)
+            .ExecuteDeleteAsync(cancellationToken)
+            .ConfigureAwait(false);
+
+        if (items.Count == 0)
+        {
+            return;
+        }
+
+        // The pair is the primary key, so anything already recorded against the canonical view stays put.
+        var existing = await dbContext.AncestorIds
+            .Where(e => e.ParentItemId.Equals(canonicalId))
+            .Select(e => e.ItemId)
+            .ToListAsync(cancellationToken)
+            .ConfigureAwait(false);
+
+        foreach (var itemId in items.Except(existing))
+        {
+            dbContext.AncestorIds.Add(new AncestorId
+            {
+                ItemId = itemId,
+                ParentItemId = canonicalId,
+                Item = null!,
+                ParentItem = null!
+            });
+        }
+
+        await dbContext.SaveChangesAsync(cancellationToken).ConfigureAwait(false);
+    }
+}

Jellyfin.Server/Migrations/Routines/20260831100000_EnableLocalSimilarityProviders.cs

@@ -0,0 +1,146 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Jellyfin.Server.Migrations.Stages;
+using Jellyfin.Server.ServerSetupApp;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.Providers;
+using MediaBrowser.Model.Configuration;
+using MediaBrowser.Model.Entities;
+using Microsoft.Extensions.Logging;
+
+namespace Jellyfin.Server.Migrations.Routines;
+
+/// <summary>
+/// Enables the local similarity providers on libraries that predate the similar items settings.
+/// </summary>
+[JellyfinMigration("2026-08-31T10:00:00", nameof(EnableLocalSimilarityProviders), Stage = JellyfinMigrationStageTypes.AppInitialisation)]
+internal class EnableLocalSimilarityProviders : IAsyncMigrationRoutine
+{
+    private readonly ILibraryManager _libraryManager;
+    private readonly IProviderManager _providerManager;
+    private readonly ILogger _logger;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="EnableLocalSimilarityProviders"/> class.
+    /// </summary>
+    /// <param name="libraryManager">The library manager.</param>
+    /// <param name="providerManager">The provider manager.</param>
+    /// <param name="startupLogger">The startup logger for Startup UI integration.</param>
+    /// <param name="logger">The logger.</param>
+    public EnableLocalSimilarityProviders(
+        ILibraryManager libraryManager,
+        IProviderManager providerManager,
+        IStartupLogger<EnableLocalSimilarityProviders> startupLogger,
+        ILogger<EnableLocalSimilarityProviders> logger)
+    {
+        _libraryManager = libraryManager;
+        _providerManager = providerManager;
+        _logger = startupLogger.With(logger);
+    }
+
+    /// <inheritdoc />
+    public Task PerformAsync(CancellationToken cancellationToken)
+    {
+        // Libraries created before similar items became configurable have an empty provider list,
+        // which the library editor renders as "everything unchecked" instead of falling back to the
+        // defaults it uses for new libraries. Seed the local providers so they stay enabled.
+        var localProvidersByType = GetLocalProvidersByItemType();
+        if (localProvidersByType.Count == 0)
+        {
+            return Task.CompletedTask;
+        }
+
+        foreach (var virtualFolder in _libraryManager.GetVirtualFolders(false))
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            EnableLocalProviders(virtualFolder, localProvidersByType);
+        }
+
+        return Task.CompletedTask;
+    }
+
+    private void EnableLocalProviders(VirtualFolderInfo virtualFolder, Dictionary<string, string[]> localProvidersByType)
+    {
+        var options = virtualFolder.LibraryOptions;
+        if (options?.TypeOptions is null || options.TypeOptions.Length == 0)
+        {
+            return;
+        }
+
+        // Some virtual folders don't have a proper item id.
+        if (!Guid.TryParse(virtualFolder.ItemId, out var folderId))
+        {
+            return;
+        }
+
+        var collectionFolder = _libraryManager.GetItemById<CollectionFolder>(folderId);
+        if (collectionFolder is null)
+        {
+            _logger.LogWarning("Could not find collection folder for virtual folder '{LibraryName}' with id '{FolderId}'. Skipping.", virtualFolder.Name, folderId);
+            return;
+        }
+
+        var changed = false;
+        foreach (var typeOptions in options.TypeOptions)
+        {
+            changed |= EnableLocalProviders(typeOptions, localProvidersByType, virtualFolder.Name);
+        }
+
+        if (changed)
+        {
+            collectionFolder.UpdateLibraryOptions(options);
+        }
+    }
+
+    private bool EnableLocalProviders(TypeOptions typeOptions, Dictionary<string, string[]> localProvidersByType, string libraryName)
+    {
+        if (typeOptions.Type is null || !localProvidersByType.TryGetValue(typeOptions.Type, out var localProviders))
+        {
+            return false;
+        }
+
+        var enabled = typeOptions.SimilarItemProviders ?? [];
+        var missing = localProviders.Where(name => !enabled.Contains(name, StringComparer.OrdinalIgnoreCase)).ToArray();
+        if (missing.Length == 0)
+        {
+            return false;
+        }
+
+        // Local providers rank ahead of remote ones, and the enabled list doubles as the
+        // priority order when no explicit order was saved.
+        typeOptions.SimilarItemProviders = [.. missing, .. enabled];
+        if (typeOptions.SimilarItemProviderOrder is { Length: > 0 } order)
+        {
+            typeOptions.SimilarItemProviderOrder = [.. missing, .. order];
+        }
+
+        _logger.LogInformation("Enabled local similarity providers {Providers} for '{ItemType}' in library '{LibraryName}'.", missing, typeOptions.Type, libraryName);
+        return true;
+    }
+
+    private Dictionary<string, string[]> GetLocalProvidersByItemType()
+    {
+        var result = new Dictionary<string, string[]>(StringComparer.OrdinalIgnoreCase);
+
+        foreach (var summary in _providerManager.GetAllMetadataPlugins())
+        {
+            var names = summary.Plugins
+                .Where(p => p.Type == MetadataPluginType.LocalSimilarityProvider)
+                .Select(p => p.Name)
+                .Distinct(StringComparer.OrdinalIgnoreCase)
+                .ToArray();
+
+            if (names.Length > 0)
+            {
+                result[summary.ItemType] = names;
+            }
+        }
+
+        return result;
+    }
+}

Jellyfin.sln

@@ -99,6 +99,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Jellyfin.Database.Implement
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Jellyfin.CodeAnalysis", "src\Jellyfin.CodeAnalysis\Jellyfin.CodeAnalysis.csproj", "{11643D0F-6761-4EF7-AB71-6F9F8DE00714}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Jellyfin.Drawing.Skia.Tests", "tests\Jellyfin.Drawing.Skia.Tests\Jellyfin.Drawing.Skia.Tests.csproj", "{E24A279C-9A37-419A-8F9C-853C11FBE753}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -265,6 +267,10 @@ Global
 		{11643D0F-6761-4EF7-AB71-6F9F8DE00714}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{11643D0F-6761-4EF7-AB71-6F9F8DE00714}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{11643D0F-6761-4EF7-AB71-6F9F8DE00714}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E24A279C-9A37-419A-8F9C-853C11FBE753}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E24A279C-9A37-419A-8F9C-853C11FBE753}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E24A279C-9A37-419A-8F9C-853C11FBE753}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E24A279C-9A37-419A-8F9C-853C11FBE753}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -297,6 +303,7 @@ Global
 		{A5590358-33CC-4B39-BDE7-DC62FEB03C76} = {4C54CE05-69C8-48FA-8785-39F7F6DB1CAD}
 		{8C9F9221-8415-496C-B1F5-E7756F03FA59} = {4C54CE05-69C8-48FA-8785-39F7F6DB1CAD}
 		{11643D0F-6761-4EF7-AB71-6F9F8DE00714} = {C9F0AB5D-F4D7-40C8-A353-3305C86D6D4C}
+		{E24A279C-9A37-419A-8F9C-853C11FBE753} = {FBBB5129-006E-4AD7-BAD5-8B7CA1D10ED6}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {3448830C-EBDC-426C-85CD-7BBB9651A7FE}

MediaBrowser.Controller/Entities/Audio/MusicArtist.cs

@@ -173,10 +173,7 @@ namespace MediaBrowser.Controller.Entities.Audio
 
         public static string GetPath(string name, bool normalizeName)
         {
-            // Trim the period at the end because windows will have a hard time with that
-            var validName = normalizeName ?
-                FileSystem.GetValidFilename(name).Trim().TrimEnd('.') :
-                name;
+            var validName = normalizeName ? GetItemByNameFolderName(name) : name;
 
             return System.IO.Path.Combine(ConfigurationManager.ApplicationPaths.ArtistsPath, validName);
         }

MediaBrowser.Controller/Entities/Audio/MusicGenre.cs

@@ -80,10 +80,7 @@ namespace MediaBrowser.Controller.Entities.Audio
 
         public static string GetPath(string name, bool normalizeName)
         {
-            // Trim the period at the end because windows will have a hard time with that
-            var validName = normalizeName ?
-                FileSystem.GetValidFilename(name).Trim().TrimEnd('.') :
-                name;
+            var validName = normalizeName ? GetItemByNameFolderName(name) : name;
 
             return System.IO.Path.Combine(ConfigurationManager.ApplicationPaths.MusicGenrePath, validName);
         }

MediaBrowser.Controller/Entities/BaseItem.cs

@@ -48,6 +48,10 @@ namespace MediaBrowser.Controller.Entities
 
         public const string ThemeSongFileName = "theme";
 
+        // Well below the 255 byte limit of the common Linux filesystems and the 255 character limit
+        // of Windows, so the files inside the folder still fit within MAX_PATH.
+        private const int MaxItemByNameFolderNameBytes = 128;
+
         /// <summary>
         /// The supported image extensions.
         /// </summary>
@@ -941,6 +945,43 @@ namespace MediaBrowser.Controller.Entities
             return GetSortName(Name, EnableAlphaNumericSorting, ConfigurationManager.Configuration);
         }
 
+        /// <summary>
+        /// Turns an item-by-name entity's name into a folder name every supported filesystem accepts.
+        /// </summary>
+        /// <param name="name">The entity's name.</param>
+        /// <returns>The folder name.</returns>
+        public static string GetItemByNameFolderName(string name)
+        {
+            // Trim the period at the end because windows will have a hard time with that
+            var validName = FileSystem.GetValidFilename(name).Trim().TrimEnd('.');
+
+            // Most Linux filesystems cap a path component at 255 bytes, so a name past that cannot be
+            // turned into a folder at all - and an entity with no folder can never be created, which
+            // leaves the credit behind it stuck: not refreshable, not deletable, retried on every scan.
+            // Only broken provider data gets this long, but it still has to resolve to something, so
+            // keep a readable prefix and let a hash of the whole name tell two of them apart.
+            if (Encoding.UTF8.GetByteCount(validName) <= MaxItemByNameFolderNameBytes)
+            {
+                return validName;
+            }
+
+            var suffix = "-" + validName.GetMD5().ToString("N", CultureInfo.InvariantCulture);
+            var budget = MaxItemByNameFolderNameBytes - suffix.Length;
+            var length = Math.Min(validName.Length, budget);
+            while (length > 0 && Encoding.UTF8.GetByteCount(validName.AsSpan(0, length)) > budget)
+            {
+                length--;
+            }
+
+            // Never cut a surrogate pair in half, the lone half is not a valid file name character.
+            if (length > 0 && char.IsHighSurrogate(validName[length - 1]))
+            {
+                length--;
+            }
+
+            return string.Concat(validName.AsSpan(0, length).TrimEnd().TrimEnd('.'), suffix);
+        }
+
         /// <summary>
         /// Cleans a raw name into its sortable form by applying the configured sort rules.
         /// </summary>

MediaBrowser.Controller/Entities/Genre.cs

@@ -83,10 +83,7 @@ namespace MediaBrowser.Controller.Entities
 
         public static string GetPath(string name, bool normalizeName)
         {
-            // Trim the period at the end because windows will have a hard time with that
-            var validName = normalizeName ?
-                FileSystem.GetValidFilename(name).Trim().TrimEnd('.') :
-                name;
+            var validName = normalizeName ? GetItemByNameFolderName(name) : name;
 
             return System.IO.Path.Combine(ConfigurationManager.ApplicationPaths.GenrePath, validName);
         }

MediaBrowser.Controller/Entities/InternalItemsQuery.cs

@@ -103,6 +103,7 @@ namespace MediaBrowser.Controller.Entities
             || SubtitleLanguages.Count > 0
             || LinkedChildAncestorIds.Length > 0
             || AncestorIds.Length > 0
+            || DescendantOfId.HasValue
             || IsFavorite.HasValue
             || IsFavoriteOrLiked.HasValue
             || IsLiked.HasValue
@@ -368,6 +369,13 @@ namespace MediaBrowser.Controller.Entities
         /// </summary>
         public Guid[] LinkedChildAncestorIds { get; set; }
 
+        /// <summary>
+        /// Gets or sets the id of a folder whose descendants the items must be part of.
+        /// Unlike <see cref="AncestorIds"/> this also follows the linked children of BoxSets and
+        /// Playlists, so it reaches the items below a linked folder (a Series' episodes, for example).
+        /// </summary>
+        public Guid? DescendantOfId { get; set; }
+
         public Guid[] TopParentIds { get; set; }
 
         public CollectionType?[] PresetViews { get; set; }

MediaBrowser.Controller/Entities/Person.cs

@@ -98,10 +98,7 @@ namespace MediaBrowser.Controller.Entities
 
         public static string GetPath(string name, bool normalizeName)
         {
-            // Trim the period at the end because windows will have a hard time with that
-            var validFilename = normalizeName ?
-                FileSystem.GetValidFilename(name).Trim().TrimEnd('.') :
-                name;
+            var validFilename = normalizeName ? GetItemByNameFolderName(name) : name;
 
             string subFolderPrefix = null;
 

MediaBrowser.Controller/Entities/Studio.cs

@@ -78,10 +78,7 @@ namespace MediaBrowser.Controller.Entities
 
         public static string GetPath(string name, bool normalizeName)
         {
-            // Trim the period at the end because windows will have a hard time with that
-            var validName = normalizeName ?
-                FileSystem.GetValidFilename(name).Trim().TrimEnd('.') :
-                name;
+            var validName = normalizeName ? GetItemByNameFolderName(name) : name;
 
             return System.IO.Path.Combine(ConfigurationManager.ApplicationPaths.StudioPath, validName);
         }

MediaBrowser.Controller/Entities/TV/Series.cs

@@ -4,6 +4,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.Linq;
 using System.Text.Json.Serialization;
 using System.Threading;
@@ -89,15 +90,14 @@ namespace MediaBrowser.Controller.Entities.TV
 
                 if (!string.IsNullOrEmpty(groupingKey))
                 {
-                    return AppendPreferredLanguage(groupingKey);
+                    return AddLibrariesToPresentationUniqueKey(groupingKey);
                 }
             }
 
             return base.CreatePresentationUniqueKey();
         }
 
-        // The owning libraries are deliberately NOT part of the key.
-        private string AppendPreferredLanguage(string key)
+        private string AddLibrariesToPresentationUniqueKey(string key)
         {
             var lang = GetPreferredMetadataLanguage();
             if (!string.IsNullOrEmpty(lang))
@@ -105,7 +105,17 @@ namespace MediaBrowser.Controller.Entities.TV
                 key += "-" + lang;
             }
 
-            return key;
+            var folders = LibraryManager.GetCollectionFolders(this)
+                .Select(i => i.Id.ToString("N", CultureInfo.InvariantCulture))
+                .Order(StringComparer.Ordinal)
+                .ToArray();
+
+            if (folders.Length == 0)
+            {
+                return key;
+            }
+
+            return key + "-" + string.Join('-', folders);
         }
 
         private string GetNameBasedGroupingKey()
@@ -125,20 +135,19 @@ namespace MediaBrowser.Controller.Entities.TV
         {
             var seriesKey = GetUniqueSeriesKey(this);
 
-            var result = LibraryManager.GetCount(new InternalItemsQuery(user)
+            var result = LibraryManager.GetItemIds(new InternalItemsQuery(user)
             {
                 AncestorWithPresentationUniqueKey = null,
                 SeriesPresentationUniqueKey = seriesKey,
                 IncludeItemTypes = new[] { BaseItemKind.Season },
                 IsVirtualItem = false,
-                Limit = 0,
                 DtoOptions = new DtoOptions(false)
                 {
                     EnableImages = false
                 }
             });
 
-            return result;
+            return result.Count;
         }
 
         public override int GetRecursiveChildCount(User user)

MediaBrowser.Controller/Entities/Year.cs

@@ -85,10 +85,7 @@ namespace MediaBrowser.Controller.Entities
 
         public static string GetPath(string name, bool normalizeName)
         {
-            // Trim the period at the end because windows will have a hard time with that
-            var validName = normalizeName ?
-                FileSystem.GetValidFilename(name).Trim().TrimEnd('.') :
-                name;
+            var validName = normalizeName ? GetItemByNameFolderName(name) : name;
 
             return System.IO.Path.Combine(ConfigurationManager.ApplicationPaths.YearPath, validName);
         }

MediaBrowser.Controller/IO/FileSystemHelper.cs

@@ -166,4 +166,40 @@ public static class FileSystemHelper
 
         return ResolveLinkTarget(fileInfo.FullName, returnFinalTarget);
     }
+
+    /// <summary>
+    /// Combines a caller supplied name with a parent directory, making sure the name cannot escape that directory.
+    /// </summary>
+    /// <param name="parentPath">The directory the name has to resolve inside of.</param>
+    /// <param name="name">The name of the child.</param>
+    /// <returns>
+    /// The full path of the child, or <c>null</c> if <paramref name="name"/> is not the name of a direct child
+    /// of <paramref name="parentPath"/>.
+    /// </returns>
+    public static string? GetChildPath(string parentPath, string name)
+    {
+        if (string.IsNullOrWhiteSpace(name) || name.Contains('\0', StringComparison.Ordinal))
+        {
+            return null;
+        }
+
+        // Rejects directory separators, and on Windows also volume separators, as those make the name more than a single segment.
+        if (!string.Equals(Path.GetFileName(name), name, StringComparison.Ordinal))
+        {
+            return null;
+        }
+
+        var fullPath = Path.GetFullPath(Path.Combine(parentPath, name));
+        var fullParentPath = Path.TrimEndingDirectorySeparator(Path.GetFullPath(parentPath));
+
+        // Catches the remaining relative names, "." and "..", which are valid single segments.
+        if (!string.Equals(Path.GetDirectoryName(fullPath), fullParentPath, StringComparison.Ordinal))
+        {
+            return null;
+        }
+
+        // Windows strips trailing dots and spaces, so a name like "..." resolves to the parent directory itself
+        // and a name like "Movies." to a different child. Reject anything normalization did not leave intact.
+        return string.Equals(Path.GetFileName(fullPath), name, StringComparison.Ordinal) ? fullPath : null;
+    }
 }

MediaBrowser.Controller/Library/ILibraryManager.cs

@@ -605,6 +605,12 @@ namespace MediaBrowser.Controller.Library
         /// <returns>List&lt;System.String&gt;.</returns>
         IReadOnlyList<string> GetPeopleNames(InternalPeopleQuery query);
 
+        /// <summary>
+        /// Deletes every credit that no item maps to any more.
+        /// </summary>
+        /// <returns>The number of credits that were deleted.</returns>
+        int DeleteOrphanedCredits();
+
         /// <summary>
         /// Gets the distinct people names per item for multiple items.
         /// </summary>
@@ -752,9 +758,9 @@ namespace MediaBrowser.Controller.Library
         /// Returns the count of immediate children (non-recursive) for each parent.
         /// </summary>
         /// <param name="parentIds">The list of parent folder IDs.</param>
-        /// <param name="userId">The user ID for access filtering.</param>
+        /// <param name="user">The user the counts are for, or null to count without a user's preferences.</param>
         /// <returns>Dictionary mapping parent ID to child count.</returns>
-        Dictionary<Guid, int> GetChildCountBatch(IReadOnlyList<Guid> parentIds, Guid? userId);
+        Dictionary<Guid, int> GetChildCountBatch(IReadOnlyList<Guid> parentIds, User? user);
 
         /// <summary>
         /// Batch-fetches played and total counts for multiple folder items.

MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs

@@ -1318,7 +1318,7 @@ namespace MediaBrowser.Controller.MediaEncoding
                     arg.Append(canvasArgs);
                 }
 
-                arg.Append(" -i file:\"").Append(subtitlePath).Append('\"');
+                arg.Append(" -i file:\"").Append(subtitlePath.EscapeProcessArgument()).Append('\"');
             }
 
             if (state.AudioStream is not null && state.AudioStream.IsExternal)
@@ -1330,7 +1330,7 @@ namespace MediaBrowser.Controller.MediaEncoding
                     arg.Append(' ').Append(seekAudioParam);
                 }
 
-                arg.Append(" -i \"").Append(state.AudioStream.Path).Append('"');
+                arg.Append(" -i \"").Append(state.AudioStream.Path.EscapeProcessArgument()).Append('"');
             }
 
             // Disable auto inserted SW scaler for HW decoders in case of changed resolution.

MediaBrowser.Controller/Persistence/IItemCountService.cs

@@ -80,7 +80,7 @@ public interface IItemCountService
     /// Batch-fetches child counts for multiple parent folders.
     /// </summary>
     /// <param name="parentIds">The list of parent folder IDs.</param>
-    /// <param name="userId">The user ID for access filtering.</param>
+    /// <param name="user">The user the counts are for, or null to count without a user's preferences.</param>
     /// <returns>Dictionary mapping parent ID to child count.</returns>
-    Dictionary<Guid, int> GetChildCountBatch(IReadOnlyList<Guid> parentIds, Guid? userId);
+    Dictionary<Guid, int> GetChildCountBatch(IReadOnlyList<Guid> parentIds, User? user);
 }

MediaBrowser.Controller/Persistence/IPeopleRepository.cs

@@ -33,6 +33,12 @@ public interface IPeopleRepository
     /// <returns>The list of people names matching the filter.</returns>
     IReadOnlyList<string> GetPeopleNames(InternalPeopleQuery filter);
 
+    /// <summary>
+    /// Deletes every credit that no item maps to any more.
+    /// </summary>
+    /// <returns>The number of credits that were deleted.</returns>
+    int DeleteOrphanedCredits();
+
     /// <summary>
     /// Gets the distinct people names per item for multiple items efficiently by querying from the mapping table.
     /// </summary>

MediaBrowser.Controller/Providers/MetadataResult.cs

@@ -16,11 +16,6 @@ namespace MediaBrowser.Controller.Providers
         private List<(string Url, ImageType Type)> _remoteImages;
         private List<PersonInfo> _people;
 
-        public MetadataResult()
-        {
-            ResultLanguage = "en";
-        }
-
         public List<LocalImageInfo> Images
         {
             get => _images ??= [];
@@ -43,6 +38,9 @@ namespace MediaBrowser.Controller.Providers
 
         public T Item { get; set; }
 
+        /// <summary>
+        /// Gets or sets the language the fetched metadata is in.
+        /// </summary>
         public string ResultLanguage { get; set; }
 
         public string Provider { get; set; }

MediaBrowser.Controller/Session/ISessionManager.cs

@@ -238,23 +238,26 @@ namespace MediaBrowser.Controller.Session
         /// <summary>
         /// Adds the additional user.
         /// </summary>
+        /// <param name="controllingSessionId">The controlling session identifier.</param>
         /// <param name="sessionId">The session identifier.</param>
         /// <param name="userId">The user identifier.</param>
-        void AddAdditionalUser(string sessionId, Guid userId);
+        void AddAdditionalUser(string controllingSessionId, string sessionId, Guid userId);
 
         /// <summary>
         /// Removes the additional user.
         /// </summary>
+        /// <param name="controllingSessionId">The controlling session identifier.</param>
         /// <param name="sessionId">The session identifier.</param>
         /// <param name="userId">The user identifier.</param>
-        void RemoveAdditionalUser(string sessionId, Guid userId);
+        void RemoveAdditionalUser(string controllingSessionId, string sessionId, Guid userId);
 
         /// <summary>
         /// Reports the now viewing item.
         /// </summary>
+        /// <param name="controllingSessionId">The controlling session identifier.</param>
         /// <param name="sessionId">The session identifier.</param>
         /// <param name="itemId">The item identifier.</param>
-        void ReportNowViewingItem(string sessionId, string itemId);
+        void ReportNowViewingItem(string controllingSessionId, string sessionId, string itemId);
 
         /// <summary>
         /// Authenticates the new session.
@@ -268,9 +271,10 @@ namespace MediaBrowser.Controller.Session
         /// <summary>
         /// Reports the capabilities.
         /// </summary>
+        /// <param name="controllingSessionId">The controlling session identifier.</param>
         /// <param name="sessionId">The session identifier.</param>
         /// <param name="capabilities">The capabilities.</param>
-        void ReportCapabilities(string sessionId, ClientCapabilities capabilities);
+        void ReportCapabilities(string controllingSessionId, string sessionId, ClientCapabilities capabilities);
 
         /// <summary>
         /// Reports the transcoding information.

MediaBrowser.Controller/Session/SessionInfo.cs

@@ -28,6 +28,7 @@ namespace MediaBrowser.Controller.Session
         private readonly Lock _progressLock = new();
         private Timer _progressTimer;
         private PlaybackProgressInfo _lastProgressInfo;
+        private long? _lastPlaybackCheckInPositionTicks;
 
         private bool _disposed;
 
@@ -124,6 +125,22 @@ namespace MediaBrowser.Controller.Session
         /// <value>The last playback check in.</value>
         public DateTime LastPlaybackCheckIn { get; set; }
 
+        /// <summary>
+        /// Gets the position reported by the client at the last playback check-in.
+        /// </summary>
+        /// <value>The position ticks, or <see langword="null"/> if the client did not report a position.</value>
+        [JsonIgnore]
+        public long? LastPlaybackCheckInPositionTicks
+        {
+            get
+            {
+                lock (_progressLock)
+                {
+                    return _lastPlaybackCheckInPositionTicks;
+                }
+            }
+        }
+
         /// <summary>
         /// Gets or sets the last paused date.
         /// </summary>
@@ -372,6 +389,7 @@ namespace MediaBrowser.Controller.Session
 
             lock (_progressLock)
             {
+                _lastPlaybackCheckInPositionTicks = progressInfo.PositionTicks;
                 _lastProgressInfo = progressInfo;
 
                 if (_progressTimer is null)

MediaBrowser.MediaEncoding/Attachments/AttachmentExtractor.cs

@@ -14,7 +14,6 @@ using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.IO;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.MediaEncoding;
-using MediaBrowser.MediaEncoding.Encoder;
 using MediaBrowser.Model.Dto;
 using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.IO;
@@ -160,7 +159,7 @@ namespace MediaBrowser.MediaEncoding.Attachments
                         CultureInfo.InvariantCulture,
                         "-dump_attachment:{0} \"{1}\" ",
                         attachment.Index,
-                        EncodingUtils.NormalizePath(attachmentPath));
+                        attachmentPath.EscapeProcessArgument());
                     missingPaths.Add(attachmentPath);
                 }
 
@@ -425,7 +424,7 @@ namespace MediaBrowser.MediaEncoding.Attachments
                 "-dump_attachment:{1} \"{2}\" -i {0} {3}",
                 inputPath,
                 attachmentStreamIndex,
-                EncodingUtils.NormalizePath(outputPath),
+                outputPath.EscapeProcessArgument(),
                 hasVideoOrAudioStream ? "-t 0 -f null null" : string.Empty);
 
             int exitCode;

MediaBrowser.MediaEncoding/Encoder/EncodingUtils.cs

@@ -4,6 +4,7 @@ using System;
 using System.Collections.Generic;
 using System.Globalization;
 using System.Linq;
+using Jellyfin.Extensions;
 using MediaBrowser.Model.MediaInfo;
 
 namespace MediaBrowser.MediaEncoding.Encoder
@@ -42,7 +43,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
             // If there's more than one we'll need to use the concat command
             if (inputFiles.Count > 1)
             {
-                var files = string.Join('|', inputFiles.Select(NormalizePath));
+                var files = string.Join('|', inputFiles.Select(f => f.EscapeProcessArgument()));
 
                 return string.Format(CultureInfo.InvariantCulture, "concat:\"{0}\"", files);
             }
@@ -64,21 +65,9 @@ namespace MediaBrowser.MediaEncoding.Encoder
                 return string.Format(CultureInfo.InvariantCulture, "\"{0}\"", path);
             }
 
-            // Quotes are valid path characters in linux and they need to be escaped here with a leading \
-            path = NormalizePath(path);
+            path = path.EscapeProcessArgument();
 
             return string.Format(CultureInfo.InvariantCulture, "{1}:\"{0}\"", path, inputPrefix);
         }
-
-        /// <summary>
-        /// Normalizes the path.
-        /// </summary>
-        /// <param name="path">The path.</param>
-        /// <returns>System.String.</returns>
-        public static string NormalizePath(string path)
-        {
-            // Quotes are valid path characters in linux and they need to be escaped here with a leading \
-            return path.Replace("\"", "\\\"", StringComparison.Ordinal);
-        }
     }
 }

MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs

@@ -12,6 +12,7 @@ using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using AsyncKeyedLock;
+using Jellyfin.Extensions;
 using MediaBrowser.Common;
 using MediaBrowser.Common.Configuration;
 using MediaBrowser.Common.Extensions;
@@ -453,7 +454,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
                 encodingParam = " -sub_charenc " + encodingParam;
             }
 
-            var args = string.Format(CultureInfo.InvariantCulture, "-y {0} -i \"{1}\" -c:s srt \"{2}\"", encodingParam, inputPath, outputPath);
+            var args = string.Format(CultureInfo.InvariantCulture, "-y {0} -i \"{1}\" -c:s srt \"{2}\"", encodingParam, inputPath.EscapeProcessArgument(), outputPath.EscapeProcessArgument());
 
             await ExtractSubtitlesForFile(
                 inputPath,
@@ -631,7 +632,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
                         streamIndex,
                         outputCodec,
                         outputFormatOption,
-                        outputPath);
+                        outputPath.EscapeProcessArgument());
                 }
 
                 await ExtractSubtitlesForFile(inputPath, args, outputPaths, cancellationToken).ConfigureAwait(false);
@@ -689,7 +690,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
                     streamIndex,
                     outputCodec,
                     outputFormatOption,
-                    outputPath);
+                    outputPath.EscapeProcessArgument());
             }
 
             if (outputPaths.Count > 0)

MediaBrowser.Model/Dlna/TranscodingProfile.cs

@@ -141,6 +141,7 @@ public class TranscodingProfile
     /// Gets or sets a value indicating whether breaking the video stream on non-keyframes is supported.
     /// </summary>
     [DefaultValue(false)]
+    [XmlIgnore]
     [XmlAttribute("breakOnNonKeyFrames")]
     [Obsolete("This is always false")]
     public bool? BreakOnNonKeyFrames { get; set; }

MediaBrowser.Model/Entities/ProviderIdsExtensions.cs

@@ -1,14 +1,16 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
 using System.Linq;
+using System.Text.RegularExpressions;
 
 namespace MediaBrowser.Model.Entities;
 
 /// <summary>
 /// Class ProviderIdsExtensions.
 /// </summary>
-public static class ProviderIdsExtensions
+public static partial class ProviderIdsExtensions
 {
     /// <summary>
     /// Case-insensitive dictionary of <see cref="MetadataProvider"/> string representation.
@@ -20,6 +22,27 @@ public static class ProviderIdsExtensions
                 enumValue => enumValue.ToString(),
                 StringComparer.OrdinalIgnoreCase);
 
+    /// <summary>
+    /// The known id formats, keyed by provider name.
+    /// </summary>
+    private static readonly Dictionary<string, Func<string, bool>> _providerIdValidators =
+        new(StringComparer.OrdinalIgnoreCase)
+        {
+            [MetadataProvider.Imdb.ToString()] = value => ImdbIdRegex().IsMatch(value),
+            [MetadataProvider.Tmdb.ToString()] = IsPositiveNumber,
+            [MetadataProvider.TmdbCollection.ToString()] = IsPositiveNumber,
+            [MetadataProvider.AudioDbArtist.ToString()] = IsPositiveNumber,
+            [MetadataProvider.AudioDbAlbum.ToString()] = IsPositiveNumber,
+
+            // Every MusicBrainz id is an MBID.
+            [MetadataProvider.MusicBrainzAlbum.ToString()] = IsGuid,
+            [MetadataProvider.MusicBrainzAlbumArtist.ToString()] = IsGuid,
+            [MetadataProvider.MusicBrainzArtist.ToString()] = IsGuid,
+            [MetadataProvider.MusicBrainzReleaseGroup.ToString()] = IsGuid,
+            [MetadataProvider.MusicBrainzRecording.ToString()] = IsGuid,
+            [MetadataProvider.MusicBrainzTrack.ToString()] = IsGuid
+        };
+
     /// <summary>
     /// Checks if this instance has an id for the given provider.
     /// </summary>
@@ -101,6 +124,26 @@ public static class ProviderIdsExtensions
         return instance.GetProviderId(provider.ToString());
     }
 
+    /// <summary>
+    /// Checks whether a value can be an id of the given provider.
+    /// </summary>
+    /// <param name="name">The provider name.</param>
+    /// <param name="value">The provider id.</param>
+    /// <returns><c>true</c> if the value has a plausible format for the provider; otherwise, <c>false</c>.</returns>
+    /// <remarks>
+    /// Providers regularly hand out an id belonging to a different service, e.g. an IMDb person id in the
+    /// TMDb field. Such an id is not just useless, it also makes the owning provider fail for the item.
+    /// </remarks>
+    public static bool IsValidProviderId(string? name, string? value)
+    {
+        if (string.IsNullOrWhiteSpace(name) || string.IsNullOrWhiteSpace(value))
+        {
+            return false;
+        }
+
+        return !_providerIdValidators.TryGetValue(name, out var isValid) || isValid(value);
+    }
+
     /// <summary>
     /// Sets a provider id.
     /// </summary>
@@ -121,6 +164,14 @@ public static class ProviderIdsExtensions
             return false;
         }
 
+        name = name.Trim();
+        value = value.Trim();
+
+        if (!IsValidProviderId(name, value))
+        {
+            return false;
+        }
+
         // Ensure it exists
         instance.ProviderIds ??= new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
 
@@ -153,7 +204,6 @@ public static class ProviderIdsExtensions
     /// <param name="instance">The instance.</param>
     /// <param name="name">The name, this should not contain a '=' character.</param>
     /// <param name="value">The value.</param>
-    /// <remarks>Due to how deserialization from the database works the name cannot contain '='.</remarks>
     public static void SetProviderId(this IHasProviderIds instance, string name, string value)
     {
         ArgumentNullException.ThrowIfNull(instance);
@@ -166,17 +216,27 @@ public static class ProviderIdsExtensions
             throw new ArgumentException("Provider id name cannot contain '='", nameof(name));
         }
 
-        // Ensure it exists
-        instance.ProviderIds ??= new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+        instance.TrySetProviderId(name, value);
+    }
 
-        // Match on internal MetadataProvider enum string values before adding arbitrary providers
-        if (_metadataProviderEnumDictionary.TryGetValue(name, out var enumValue))
+    /// <summary>
+    /// Replaces all provider ids, dropping the ones that cannot belong to the provider they are filed under.
+    /// </summary>
+    /// <param name="instance">The instance.</param>
+    /// <param name="providerIds">The provider ids to set.</param>
+    public static void SetProviderIds(this IHasProviderIds instance, IReadOnlyDictionary<string, string>? providerIds)
+    {
+        ArgumentNullException.ThrowIfNull(instance);
+
+        instance.ProviderIds = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+        if (providerIds is null)
         {
-            instance.ProviderIds[enumValue] = value;
+            return;
         }
-        else
+
+        foreach (var (name, value) in providerIds)
         {
-            instance.ProviderIds[name] = value;
+            instance.TrySetProviderId(name, value);
         }
     }
 
@@ -213,4 +273,15 @@ public static class ProviderIdsExtensions
 
         instance.ProviderIds?.Remove(provider.ToString());
     }
+
+    private static bool IsPositiveNumber(string value)
+        => int.TryParse(value, NumberStyles.None, CultureInfo.InvariantCulture, out var id) && id > 0;
+
+    private static bool IsGuid(string value)
+        => Guid.TryParse(value, CultureInfo.InvariantCulture, out _);
+
+    // An IMDb id is a type prefix (tt for titles, nm for people, co for companies, ...) followed by
+    // digits. The prefix is optional because a bare number has always been accepted for a title.
+    [GeneratedRegex(@"^(tt|nm|co|ev|ch|ni)?[0-9]+$", RegexOptions.IgnoreCase)]
+    private static partial Regex ImdbIdRegex();
 }

MediaBrowser.Providers/Books/ComicBookInfo/ComicBookInfoProvider.cs

@@ -204,7 +204,7 @@ public class ComicBookInfoProvider : IComicProvider
     {
         try
         {
-            return CultureInfo.GetCultureInfo(language).DisplayName;
+            return CultureInfo.GetCultureInfo(language).TwoLetterISOLanguageName;
         }
         catch (CultureNotFoundException)
         {

MediaBrowser.Providers/Books/ComicInfo/ExternalComicInfoProvider.cs

@@ -52,7 +52,7 @@ public class ExternalComicInfoProvider : IComicProvider
         var metadataResult = new MetadataResult<Book> { Item = book, HasMetadata = true };
 
         ComicInfoReader.ReadPeopleMetadata(comicInfoXml, metadataResult);
-        ComicInfoReader.ReadCultureInfoInto(comicInfoXml, "ComicInfo/LanguageISO", cultureInfo => metadataResult.ResultLanguage = cultureInfo.ThreeLetterISOLanguageName);
+        ComicInfoReader.ReadCultureInfoInto(comicInfoXml, "ComicInfo/LanguageISO", cultureInfo => metadataResult.ResultLanguage = cultureInfo.TwoLetterISOLanguageName);
 
         return metadataResult;
     }

MediaBrowser.Providers/Books/ComicInfo/InternalComicInfoProvider.cs

@@ -50,7 +50,7 @@ public class InternalComicInfoProvider : IComicProvider
         var metadataResult = new MetadataResult<Book> { Item = book, HasMetadata = true };
 
         ComicInfoReader.ReadPeopleMetadata(comicInfoXml, metadataResult);
-        ComicInfoReader.ReadCultureInfoInto(comicInfoXml, "ComicInfo/LanguageISO", cultureInfo => metadataResult.ResultLanguage = cultureInfo.ThreeLetterISOLanguageName);
+        ComicInfoReader.ReadCultureInfoInto(comicInfoXml, "ComicInfo/LanguageISO", cultureInfo => metadataResult.ResultLanguage = cultureInfo.TwoLetterISOLanguageName);
 
         return metadataResult;
     }

MediaBrowser.Providers/Manager/MetadataLanguageUtils.cs

@@ -0,0 +1,44 @@
+using System;
+
+namespace MediaBrowser.Providers.Manager;
+
+/// <summary>
+/// Helpers for comparing the language of fetched metadata with the language that was requested.
+/// </summary>
+internal static class MetadataLanguageUtils
+{
+    /// <summary>
+    /// Gets the language subtag of a language tag, e.g. "es" for "es-ES".
+    /// </summary>
+    /// <param name="language">The language tag.</param>
+    /// <returns>The language subtag, lowercased, or <c>null</c> if none was given.</returns>
+    public static string? GetLanguageSubtag(string? language)
+    {
+        if (string.IsNullOrEmpty(language))
+        {
+            return null;
+        }
+
+        var separator = language.IndexOf('-', StringComparison.Ordinal);
+
+        return (separator == -1 ? language : language[..separator]).ToLowerInvariant();
+    }
+
+    /// <summary>
+    /// Determines whether a provider result can be considered to be in the requested language.
+    /// </summary>
+    /// <param name="resultLanguage">The language the provider reported for its result, if any.</param>
+    /// <param name="preferredLanguage">The language that was requested, if any.</param>
+    /// <returns><c>true</c> if the result is in the requested language or either language is unknown.</returns>
+    public static bool MatchesPreferredLanguage(string? resultLanguage, string? preferredLanguage)
+    {
+        // A provider that doesn't report a language cannot be judged, assume it honored the request
+        if (string.IsNullOrEmpty(resultLanguage) || string.IsNullOrEmpty(preferredLanguage))
+        {
+            return true;
+        }
+
+        // Compare on the language subtag only so that e.g. "es" matches "es-ES"
+        return string.Equals(GetLanguageSubtag(resultLanguage), GetLanguageSubtag(preferredLanguage), StringComparison.Ordinal);
+    }
+}