[FFmpeg-trac] #5641(avformat:open): Support WebVTT according to MKV specs

[FFmpeg]

#5641: Support WebVTT according to MKV specs
------------------------------------+------------------------------------
             Reporter:  RiCON       |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  avformat
              Version:  git-master  |               Resolution:
             Keywords:  webvtt mkv  |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  0           |
------------------------------------+------------------------------------

Comment (by werrel3):

 I raised this VLC bug https://trac.ffmpeg.org/ticket/5641 about vlc not
 displaying webvtt subtitles correctly. It turned out to be youtube-dl not
 correctly embedding the subtitles (https://github.com/ytdl-org/youtube-
 dl/issues/16338) due to ffmpeg using the wrong ID for webvtt subtitles in
 MKV files.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5641#comment:2>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker