[FFmpeg-trac] #6873(avformat:new): Crash with muxing a lot of streams in Matroska

[FFmpeg]

#6873: Crash with muxing a lot of streams in Matroska
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             Reporter:  mkver        |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  mkv crash    |               Blocked By:
  SIGSEGV regression                 |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
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Comment (by mkver):

 Replying to [comment:2 cehoyos]:
 > Why are there two samples allowing to reproduce the issue?
 >
 > Please do not attach samples that do not allow to reproduce, this has
 often lead to confusion in the past.
 Because there might be two different reasons for the crashes. At least the
 gdb output shows that the segmentation fault occurs at line 2597 for b),
 for a) it's 2415. So I have uploaded samples for both. I have also
 uploaded a sample for c) (namely that the TrackID actually written to the
 blocks of the file are always only the seven least significant bits.

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Ticket URL: <https://trac.ffmpeg.org/ticket/6873#comment:3>
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