[FFmpeg-trac] #3394(avformat:new): mp4 -> mkv produces broken file

[FFmpeg]

#3394: mp4 -> mkv produces broken file
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             Reporter:  tessus       |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  mkv          |               Blocked By:
  regression                         |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
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Comment (by tessus):

 I'm terribly sorry, I made a mistake with my earlier testing. I mentioned
 earlier that it doesn't matter, if the subtitles are muxed in or not.

 This is actually not true. I only have the problem when the subtitles are
 muxed in via `-scodec copy`. I'm truly sorry, if I wasted your time.

 Well, it is still a problem, just not the one I opened it for.

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Ticket URL: <https://trac.ffmpeg.org/ticket/3394#comment:14>
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