[mythtv-users] Anyone successfully displaying 720p or above on a Pundit?

Scott catfather at donpoo.net
Sun Jul 24 17:36:15 EDT 2005

On Jul 24, 2005, at 3:40 PM, Jerry Rubinow wrote:
> I'm also using the latest SIS driver from winischhofer.net.  Hmm, when
> I play the pchdtv.com sample in mplayer, I get video of some people on
> a train (and it's doubled horizontally so there are two images of the
> same thing).

Yeah, it's interlaced or some such it seems. The picture quality is  
quite bad over all.

> When I play the same one within Myth, I get video of a
> man and a woman singing, and it plays completely properly.

I assume you're using the MythTV Internal player to do this? I've  
never seen this 'other channel' you refer to from within xine or  
mplayer. I also haven't bothered to try the MythTV Internal player  
either. to the best of knowledge there is only one channel in the  
stream but I'm not sure how I would check it from mplayer or xine.

> You say you had to abandon onboard SIS.  What did you use instead?  My
> Pundit has no AGP slot.

Low end ATI 9200SE with DVI out and the Xorg 6.8.2 radeon driver.  
Playback is done with Xv. The xorg radeon driver has an Xv scaling  
bug where the right 1/4 side of the screen renders as a pink bar with  
1920x1080 sources. I wouldn't recommend ATI cards because of this.

A small aside... The 1.0.1 version of xine-lib has a video option for  
the opengl driver called 2D_Tex_Fragprog that supposedly is as fast  
or faster than Xv on "modern graphics cards".  On my Pundit with ATI  
9200SE PCI glxgears gives me a whopping 450fps which frankly sucks  
(yes, glxinfo shows direct rendering enabled and xfree logs show glx  
and dri loading just fine) which makes the new xine opengl playback  
perform like crap with any size video stream. I figure the bad opengl  
performance is a result of the slow PCI bus on the Pundit. As for the  
onboard SIS in the Pundit there is no opengl or dri support so all  
this is pretty much irrelevant unless you plan to put in a fast PCI  
video card. What might be really interesting is to see the CPU  
performance of a modern ATI card using dri and the opengl output from  
xine-lib 1.0.1 when playing back HDTV streams.

Getting back to the Pundit... My old SIS config was back on MythTV  
0.16 with Gentoo 2004.x. Back then I was using xorg 6.7.0 and sis_drv  
v200804. I did recently try the current sis_drv with xorg 6.8.2 on  
Gentoo 2005.0 and saw the same video jump/sync issue that caused me  
to abandon it in the first place. To bad really since I liked the  
onboard better than I liked the ATI 9200SE. No, I don't have any of  
the old config files any more.

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