[mythtv-users] XvMC, i915, latest intel drivers

R. G. Newbury newbury at mandamus.org
Fri Apr 11 21:55:38 UTC 2008


jb17bsome wrote:
> On Thu, 10 Apr 2008 13:44:32 -0700
> "Billy Macdonald" <billymacdonald at gmail.com> wrote:
> 
>> Hello,
>>
>>     I decided to give the latest Intel RC drivers a shot as they are
>> supposed to incorporate XvMC.  I have been able to get them installed
>> and was able to play back some mpeg using xine and xvmc.  So I'm
>> pretty sure that the XvMC is working, at least somewhat.
>>
>>     When I configured mythtv to try to use XvMC it crashes on SD MPEG
>> from QAM, and it falls back to xv playback in HD.  Xv playback does
>> work properly, but the machine doesn't have the guts to play 1080i
>> with 1080p output, which is my goal with XvMC.  Doing some debuging
>> MythTV is determining the max XvMC as 720x576, but xvinfo report
>> 1920x1088.  Not sure what that's about.  But until SD plays with XvMC
>> no point in even trying HD :)
>>
>>     It looks to me like the myth code is deciding to use a textured
>> surface and not the overlay surface.  Is this how it should work?  Any
>> ideas on where I should troubleshoot?  I spent last night trying to
>> dig through the code to understand how it all works, but I really
>> don't understand the XvMC stuff very well.
>>
>>     I've attached my mythfrontend log and xvinfo if anyone feels like
>> looking.
>>
>> Thanks,
>> Billy
>>
>> PS
>> fedora 8 i386
>> Xorg 1.3 (i think, that's what the rpm installed is
>> xorg-x11-server-Xorg-1.3.0.0-44.fc8.i386, but the latest Xorg releases
>> are in the 7's so that confuses me.)
>> xf86-video-intel-2.2.99.902
> 
> The intel xvmc drivers only support up to 720x576 surfaces.  So, they
> won't help for HD.  Sorry about that.  
> Also, Xvinfo gives you information about Xv but not XvMC.     

Where did you get that piece of information about 720x576? I understood 
that the intel (with xvmc) driver could handle the full 2048x2048 xv 
image size...makes no sense otherwise...

Geoff


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