[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
-------------------------------------+-------------------------------------
             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            |
-------------------------------------+-------------------------------------

Comment (by julian):

 i can no longer host the file 'bug.mkv' but for the next 5 days you should
 still be able to get it here:

 https://www.zipshare.com/download/eyJhcmNoaXZlSWQiOiJkNWMwNzlhMy05ZDQ4LTRhNzAtYmFkZC1jYzA1NDc1ODI5MWMiLCJlbWFpbCI6ImVudGVAbWFpbGluYXRvci5jb20ifQ==

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Ticket URL: <https://trac.ffmpeg.org/ticket/5998#comment:12>
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