[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
             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

Comment (by jeroenost):

 I can confirm this issue. The culprit might be this commit:

 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.

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1257#comment:3>
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