[mythtv-users] NUV (MPEG4) playback with SVN incorrectly defaulting to OpenGL when XvMC selected.

[Mark Hutchinson]

Steve Smith wrote:
> Hi,
>  
> I've just upgraded to SVN....and I just wanted to check that a bug 
> hasn't already been submitted for something I'm suffering from (I've 
> already searched the users, dev and commit lists for relevant posts 
> and tickets).
>  
> My system is P3 900mhz + Nividia FX 5200. I play exlcusively SD in the 
> form of:
> MPEG 2 (from PVR-150 and a DVB-T card), MPEG-4 (NUVs using the inbuilt 
> transcoder), misc AVIs.
>  
> The problem:
>  
> I like to use XVMC to give myself a bit of CPU headroom on MPEG2 playback.
>  
> When I set the playback profiles to use Standard XVMC (setting 
> Video-renderer to xv-blit )
>        a) MPEG-2 playback is fine.
>        b) MPEG-4(NUV) playback does not work (it plays a couple of 
> frames then the video freezes but the audio plays fine).
>  
> ( I can playback without XVMC fine it's just that I'd like to use XvMC 
> if I can...)
>  
> Doing some investigation of the logs (which I don't have access to at 
> the moment) I can see that:
> Playing MPEG2:
>       Videorenderer is set to "Standard XVMC" and Renderer = 
> Xv-Blit..... playback is good.
> Playing MPEG4(NUV)
>        Trys to set output to "Standard XvMC" fails....ok that's fine 
> MPEG4 shouldn't work with XvMC.
>  
> THEN for some reason the VideoRenderer fails back to "OpenGL"......oh 
> dear.
> OpenGL is too much for my little system and the playback doesn't work.
>  
>  
>  
> When the profile is set up as XV all the way thru; MPEG4 playback 
> correctly selects the Xv-Blit renderer and plays well...
>  
>  
> Has anyone spotted this before?
>  
> (The proper fix for this would allow the internal player to be 
> configured for each Codec rather than just MPEG2, but I may try to 
> find a patch that just swaps the order of fallback renderers.)
>  
> Cheers
> Steve
>  
> ------------------------------------------------------------------------
>
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>   
I have experienced this.  On faster hardware it is still an issue, 
especially if you cant use XvMC such as on the 8XXX series NVidia cards.
I think a bug report needs to be created and the Internal player needs 
to be fixed up.