Previously, we predicted whether the subtitle should be burned in with transcode reasons, but that was not accurate because the actual transcoding codec is only determined after the client has requested the stream. This pass through the option to the `DynamicHlsController` to handle the subtitle burn-in during the actual transcoding process. Now the client should be responsible to conditionally load the subtitle when this option is enabled.
Some options that are too performance-intensive are disabled, while
others are left enabled to trade-off between real-time playback and quality.
Signed-off-by: nyanmisaka <nst799610810@gmail.com>
Some Audio codec will have a null CodecTag, check for that to avoid null reference
If the client already requests a specific sample rate, use that instead of our default sample rate for AC-4
Signed-off-by: gnattu <gnattuoc@me.com>
LAME's VBR mode only has advantage over a certain bitrate range. For very low and very high bitrate, use the ABR mode instead.
aac_at's CVBR mode produces very good quality and is not worse than its TVBR mode in blind testing. Use this mode for convenience.
The ffmpeg native aac encoder will have quality regression with its VBR mode. Always use CBR mode for ffmpeg's native aac encoder.
Signed-off-by: gnattu <gnattuoc@me.com>
FFmpeg deletes segments based on its own transcoding progress,
but we need to delete segments based on client download progress.
Since disk and GPU speeds vary, using hlsenc's built-in deletion
will result in premature deletion of some segments. As a consequence,
the server has to constantly respin new ffmpeg instances, resulting
in choppy video playback.
Signed-off-by: nyanmisaka <nst799610810@gmail.com>
AV1 in fMP4 requires global_header data for parsing.
Only disable global_header in TS since it has no global_header.
Signed-off-by: nyanmisaka <nst799610810@gmail.com>
The -strict -2 setting was only added if the encoder was set to 'copy'.
If 'flac' is explicitly requested, we also need to set it, so that
ffmpeg doesn't abort the conversion.
Fixes: #10066
Bond_009