[FFmpeg-trac] #7410(avcodec:new): mpeg4 decoding regression with multi-threading
FFmpeg
trac at avcodec.org
Thu Dec 13 17:52:13 EET 2018
#7410: mpeg4 decoding regression with multi-threading
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Reporter: cehoyos | Owner:
Type: defect | Status: new
Priority: important | Component: avcodec
Version: git-master | Resolution:
Keywords: asp | Blocked By:
regression handbrake | Reproduced by developer: 0
Blocking: |
Analyzed by developer: 0 |
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Comment (by taliho):
Hello,
I have posted a patch for this issue:
http://ffmpeg.org/pipermail/ffmpeg-devel/2018-December/237567.html
The artifact was created because a motion compensation parameter
quarter_sample changed during decoding of an intra frame (frame number:
99). This change was not propagated to other frame decoding threads thus
causing the artifact. I have solved this by initializing the value
quarter_sample from previous decoding thread.
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Ticket URL: <https://trac.ffmpeg.org/ticket/7410#comment:3>
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