[mythtv] XvMC VLD extension

Wander Winkelhorst w.winkelhorst at gmail.com
Mon Sep 18 12:49:38 UTC 2006

On 9/17/06, Michael Weber <mtweber at gmail.com> wrote:
> > I tried the mythtv-vid branch for Via SP13000 HDTV decoding and all I
> > get is a blank screen with good audio when trying to play 1080i
> > content.  When looking at the code, it doesn't seem like the VLD
> > extensions are being used (XvMCPutSlice2).  XvMCPutSlice2 seems to
> > boil down to a function pointer "draw_horiz_band" in a render
> > structure, but this member never seems to get called.  Have the VLD
> > extensions for the Via chipset been lost along the way?  (This
> > function also never seems to get called in the trunk either).  Am I
> > missing something or doesn't XvMCPutSlice2 need to be called for the
> > VLD decoding?
> Nevermind -- I found it, it's called throughout the libavcodec
> library.  Has anyone else experienced good sound with no video on the
> mythtv-vid branch with a Via CN400?  Is there anything I can do to
> help find this problem?

As far as I know, it's a hardware limitation.
The CN400 chipset won't do decoding above the 1024x1024 resolution.

I heard the new Intel core duo's are pretty fast..

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