[mythtv-users] My Perennial Problems with XvMC

Gregory Keeney gkeeney at panasas.com
Thu Sep 14 17:20:16 UTC 2006

Dylan Semler wrote:
> So one OS and one graphics card later, I'm back to where I was at the 
> beginning.  I've done all of the tweeks on the XvMC page on the 
> wiki.  I'm running svn as of earlier today (09/13/2006).  Aside from a 
> new processor (which will require a new motherboard, which will 
> require new ram..) I feel that there must be something that can be 
> done.  However, I also realize now that the length of this post is 
> likely to deter most people from reading it, but for those of you who 
> still are, bravo!  I'll post the outputs of mythfrontend and 
> mythbackend in case anyone can help. 
I had a similar problem with the GeForce FX 5200 Ultra using XvMC. (I am 
running Debian Testing).

I tried many things and was constantly frustrated by the fact that Myth 
would only play HD in a horribly choppy manner, yet Mplayer seemed to work.

Turned out that MPlayer was just better at dropping frames: neither were 
using XvMC properly.

What made it work was having /etc/X11/XvMCConfig contain the line:


Suddenly, everything worked. Not perfectly (There are some weird offsets 
that I have not looked into), but it worked and was watchable. Which is 
nice, as I only have a 1.1GHz Athlon.

Check your /etc/X11/XvMCConfig (or distribution equivalent).

Hope this helps.
Gregory Keeney

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