#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: 1
Analyzed by developer: 1 |
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Comment (by Shaohua Li):
Replying to [comment:2 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.
Hi, I reported another related issue, where the output files keep changes
and ''-threads 1'' won't work. (see https://trac.ffmpeg.org/ticket/9476)
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Ticket URL: <https://trac.ffmpeg.org/ticket/9272#comment:4>
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