[mythtvnz] High CPU usage decoding 720p

[Kenneth Dixon]

Ah yes threading sounds like it would solve the problem
alright, I shall investigate. I did use XBMC when I had an
X-Box, very good bit of software.
Thanks Jonathan.

Ken


----- Original Message Follows -----
> You could try building ffmpeg with the cabac patch which
> allows threading of this portion of the decoding process. 
> It's not yet in ffmpeg mainline, as there are possible
> issues with some types of options (MBAFF I think - not
> sure if this will affect NZ freeview transmissions)
> 
>
http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2007-September/035877.html
> 
> XBMC for linux includes this patch and it has dramatically
> sped up playback of h264 material on multi-core
> processors.  You could even try XBMC as a front-end to
> myth to see whether it makes a difference - see xbmc.org
> for more details (disclaimer: I am a developer on XBMC).
> 
> Cheers,
> Jonathan
> 
> On Fri, Feb 29, 2008 at 11:39 AM, Kenneth Dixon
> > <ken.dixon at clear.net.nz> wrote: Hi, when decoding the
> >  720p streams from TV1 or TV2 my CPU usage sits between
> >  60% - 100%, video gets a bit choppy on 100%.
> >  My CPU is a AMDx2 4200, which I thought would have been
> >  powerful enough, so I'm wondering if it is
> >  inefficiencies in the software?
> >  Here are my specs:
> >
> >  AMDx2 4200, frequency scaling = on-demand (working
> >  fine) Mythbuntu 7.10
> >  Nvidia 8500GT + Latest drivers (closed source)
> >  SVN ffmpeg
> >  Mythtv 20.2 + fixes
> >
> >  Any suggestions? am I missing something?
> >
> >  Thanks, Ken
> >
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