[mythtv-users] Fwd: Problem with XvMC being slow

Joseph A. Caputo jcaputo1 at comcast.net
Thu Jan 5 16:33:05 UTC 2006


On Thursday 05 January 2006 1:21, Jerry Rubinow wrote:
> When using XvMC to play back video, CPU usage is low (30% for HD, 10%
> for SD), but the video plays back slower than realtime.  I'm using an
> Nvidia 5200 card, with driver version 7667 (although I've tried every
> version up to the current 8XXX).
> 
>  Is there anything I should check?  Anything obviously wrong from the
> following details?  Or is this the XvMC slowdown I've read about? 
> What are my options for fixing this?
> 
>  If I use libmpeg2, SD plays back fine (~30% CPU), but HD maxes out
> the CPU.  I'm using current SVN myth as of a couple of days ago. 
> /etc/X11/XvMCConfig points to libXvMCNVIDIA_dynamic.so.1.  My GUI is
> 1280x720.  I'm not using any filters, and I have Enable OpenGL
> vertical sync for timing checked.

I could be way off base on this, but something in my memory is nagging 
me... something about maybe Nvidia's XvMC not supporting/performing 
well at certain resolutions?  Have you tried changing your horizontal 
resolution to something smaller, like 1024?

HTH,

JAC


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