[vlc-devel] VLC's performance on SMP system
xxcv07 at gmail.com
Mon Jun 1 16:26:55 CEST 2009
Kaloyan Kovachev wrote:
> On Mon, 01 Jun 2009 23:37:45 +1000, xxcv wrote
>> VLC-1.0.0-RC2 + ffmpeg-mt got many avcodec "cannot decode one frame", side
> effect = video shakes.
>> Windows build of Mplayer + ffmpeg-mt experimental build worked wonderfully
>> Windows Media Player 11.0 + ffdshow + ffmpeg-mt worked fine also.
>> With thread count = 2
>> Compared CPU usage graphs.
> Just to confirm that with the 64bit (slackware64) built of VLC-1.0.0-RC2 +
> ffmpeg-mt the results are the same - 'video shakes'
I just removed the part of the code where the "cannot decode one frame"
if else condition and now the video shakes effect are gone.
> and often there are
> artifacts in the picture (when the source is an HD stream with ~12Mbit/s -
> with a local file there are no artifacts)
> on a quad core CPU (Intel Q9550) and 2 threads the artifacts are in the top of
> the screen while with 4 threads in the whole picture and all 4 cores are
> loaded at near 100%
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