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Video gets transcoded if file contains ASS subtitles #365

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LinAGKar opened this issue Apr 14, 2022 · 0 comments

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bug

LinAGKar commented Apr 14, 2022

Describe the bug

If a video file contains ASS subtitles, the video is always transcoded, although the same does not happen when it contains SRT subtitles.

To Reproduce

Have an mkv file with AVC video, AAC audio, and ASS subtitles
Play the file on Chromecast
Video will be transcoded, even if the Chromecast could play the video.
Try exactly the same video, but with SRT subtitles (I just ran the file through ffmpeg with -c:a copy -c:v copy -c:s srt -map 0)
Video is played with DirectStream. Audio still got transcoded (and downmixed from 5.1 to 2.0), but video got copied.

Expected behavior

Video should not be unnecessarily transcoded

System (please complete the following information):

OS: Docker
Jellyfin Version: 10.8.0-beta1
Cast client: Gen 2

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LinAGKar added the bug label

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