[FFmpeg-trac] #1257(avcodec:closed): ffmpeg multithread decoding, the rate is not improved
FFmpeg
trac at avcodec.org
Fri Oct 26 09:12:02 CEST 2012
#1257: ffmpeg multithread decoding,the rate is not improved
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Reporter: xiaoyu | Owner:
Type: enhancement | Status: closed
Priority: wish | Component: avcodec
Version: git-master | Resolution:
Keywords: h264 | needs_more_info
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
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Comment (by jeroenost):
I can confirm this issue. The culprit might be this commit:
http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=59297ad63dbd7f9a587e742e1d5b0e94ae125fff
Multithreaded decoding is disabled for H264.
That is a problem for high resolution H264 videos that need to reencoded
realtime to another format by a multicore CPU with a relative low clock
freq, where a single core cannot decode the entire video fast enough.
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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1257#comment:3>
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