[FFmpeg-trac] #9105(ffmpeg:new): Cannot set dispositions for subtitle streams inside MKV other than Default and Forced

[FFmpeg]

#9105: Cannot set dispositions for subtitle streams inside MKV other than Default
and Forced
-------------------------------------+-------------------------------------
             Reporter:  droid-xx     |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  ffmpeg
              Version:  unspecified  |               Resolution:
             Keywords:  ffmpeg       |               Blocked By:
  disposition metadata               |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by mkver):

 The mpegts muxer code shows that these dispositions are only used when the
 track has a language (after all, it is for the MPEG-2 ISO 639 language
 descriptor).

 Also notice that lots of muxers also ignore metadata or only care about a
 few metadata entries (because the format doesn't support generic metadata
 or because it is unimplemented).

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Ticket URL: <https://trac.ffmpeg.org/ticket/9105#comment:4>
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