[mythtv-users] My Perennial Problems with XvMC

Brad Fuller bradallenfuller at yahoo.com
Thu Sep 14 18:09:30 UTC 2006

Brad Fuller wrote:
> Gregory Keeney wrote:
>> 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:
>>     libXvMCNVIDIA_dynamic.so.1
>> 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).
> I've _never_ been able to get HD working on my system. I have
> libXvMCNVIDIA_dynamic.so.1 in XvMCConfig and changed rom a 4000 to a
> 5200 just to see if it'd make a difference. Nada. I have enough
> horsepower: AMD 3200.
let me clarify: I've never been able to _reliably_ view HD on my system.
A few programs are fine. Most (all 1080i, for instance) pixelate,
freeze, etc.
Lots and lots of pre-buffering pauses. Nothing special more than any
other report that we've seen here.

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