6f0ff89bdc
* Add support for VobSub subtitle streams * update logic to determine separate extraction for VobSub subtitles * simplify VobSub extraction logic and fix ffmpeg command * Match `ExtractAllExtractableSubtitlesMKS` with `ExtractAllExtractableSubtitlesInternal` Matroska's VobSub option * Add a comments clarify why MKS was used, and remove the redundant VobSub extension branch * remove redundant VobSub format check * fix type errors