[vdr] OT: Finnish Yle HD olympics channel..

Pasi Kärkkäinen pasik at iki.fi
Tue Aug 12 15:31:30 CEST 2008


On Tue, Aug 12, 2008 at 03:07:57PM +0300, Seppo Ingalsuo wrote:
> Pasi Kärkkäinen wrote:
> > Maybe try with recent mplayer (from svn).. and give it 
> > "-demuxer lavf -lavdopts fast:threads=2 -no-correct-pts" or something similar..
> > you can also try with threads=4 etc.. 
> >   
> "mplayer -demuxer lavf -lavdopts fast:threads=4 -nocorrect-pts ..." 
> gives steady but slow motion (roughly 50% speed) video. It is weird that 
> the load on CPU1 and CPU2 is less than 40% during playback according to 
> gnome system monitor. Somehow mplayer is not able to max both CPUs close 
> to 100%.
> 

Just tried a sample of DVB-T YLE HD (720p50) on my computer..

It seems mplayer is not able to use multiple threads, at least on my
system.. I just see a single process/thread taking all of the CPU.

I guess there's still something to fix for a proper multithreading for h.264
decoding in mplayer/ffmpeg/libavcodec.. 

I used:

mplayer -demuxer lavf -lavdopts fast:threads=4

-- Pasi



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