X performance problems with Matrox G550

[Thomas Winischhofer]

Michel Dänzer wrote:
> On Tue, 2004-11-02 at 23:18 +0000, Martin Ebourne wrote:
> 
>>I have an Athlon 64 with a Matrox G550 running mythTV (a TV pvr
>>program). I am running myth on the second head (CRTC2) using the TV out.
>>In this configuration myth is doing software decoding of an MPEG2
>>stream, scaling it to the TV resolution, performing YUV to RGB32
>>colourspace mapping; X is simply copying the image to the videocard by
>>use of the XShmPutImage call.
> 
> 
> There's no XVideo support for the colourspace conversion and scaling?


Not for CRTC2, AFAIK.

Perhaps using an external VGA->TV adapter (and hence connecting to 
CRTC1) would be advisable.

Thomas


-- 
Thomas Winischhofer
Vienna/Austria
thomas AT winischhofer DOT net	       *** http://www.winischhofer.net
twini AT xfree86 DOT org