[mythtv-users] XvMC and high CPU usage

[Jerry Rubinow]

On 3/21/06, Kevin Kuphal <kuphal at dls.net> wrote:
> Jerry Rubinow wrote:
> > On 3/21/06, Kevin Kuphal <kuphal at dls.net> wrote:
> >   
> >> On FC4, I get the grey OSD and the logs report XvMC is being used but my
> >> CPU usage is high.  I can *barely* get the video to play properly using
> >> libmpeg2 but the picture seems a little jumpy.  My configure script says
> >> I'm linking with libXvMCNVIDIA as expected.  My OpenGL Vsync is working
> >> as I'm using the 7676 nvidia driver (changing it makes things worse for
> >> libmpeg2 performance).
> >>     
> >
> > Did you try turning off OpenGL Vsync?  It may make libmpeg2 worse, but
> > it improved XvMC for me.
> >
> >   
> Yes.  I have no problem with OpenGL Vsync as I'm using 7676 which has no 
> problems.   Is your CPU dramatically reduced with XvMC?  What xorg 
> version are you running?

I had no problem with the driver using OpenGL Vsync (I'm using 7676 too).  What I was getting at was that with both it and XvMC turned on, I got lots of XvMC glitches.  Of course, re-reading your original note, I see your problem is high CPU.  So different problem.  But yes, using XvMC lowered my CPU usage.

I'm running FC4 with xorg 6.8.2, FX5200, deinterlace Bob, Standard XvMC, realtime priority threads enabled, and extra audio buffering.

-Jerry