[FFmpeg-trac] #5998(avcodec:open): ffmpeg 3.1.0 and later fails converting some MKVs with "sample_fmt" error

[FFmpeg]

#5998: ffmpeg 3.1.0 and later fails converting some MKVs with "sample_fmt" error
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             Reporter:  julian       |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  dca          |               Blocked By:
  regression                         |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |
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Comment (by julian):

 i can confirm that just reverting commit
 39f7620d76c7a133535ed7a535f7a74fefa6e435 makes the bug go away

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Ticket URL: <https://trac.ffmpeg.org/ticket/5998#comment:11>
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