[FFmpeg-trac] #9272(ffmpeg:new): Unstable outputs of ffmpeg

[FFmpeg]

#9272: Unstable outputs of ffmpeg
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             Reporter:  Shaohua Li  |                    Owner:  (none)
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  ffmpeg
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by Nicolas George):

 The problem is not encoding, it is decoding, and it is with the video. It
 can be observed with just:

 {{{
 ffmpeg -an -i unstable_input.avi -f framecrc -y test01.crc
 }}}

 It shows CRC differences as soon as the second frame.

 It is a threading issue: adding {{{-threads 1}}} makes the differences go
 away, and helgrind prints a lot of errors. I will attach a log from an
 installed ffmpeg, without debug symbols.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9272#comment:2>
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