[mythtv-users] xvmc can't play 720p content at 1080i

[Daniel Walton]

I have an older HDTV that doesn't support 720p so I need to play everything at
either 480p or 1080i.  I'm using XvMC and can playback 1080i content fine but
any 720p content gives my myth box fits (the audio stuters like crazy and the
video plays a little slow).  I see the following in the logfile:

2006-12-05 16:17:48.893 NVP: prebuffering pause
2006-12-05 16:17:48.893 NVP: Waiting for prebuffer.. 0 ADDAAL
2006-12-05 16:17:48.895 AO: OutputAudioLoop: audio paused
2006-12-05 16:17:48.895 AO: 62144 bytes free on soundcard
2006-12-05 16:17:48.900 AO: OutputAudioLoop: Play Event
2006-12-05 16:17:48.900 AO: Broadcasting free space avail
2006-12-05 16:17:48.900 AO: Broadcasting free space avail
2006-12-05 16:17:48.900 AO: Broadcasting free space avail
2006-12-05 16:17:48.900 AO: Broadcasting free space avail
2006-12-05 16:17:48.904 AO: Broadcasting free space avail
2006-12-05 16:17:48.908 AO: Broadcasting free space avail
2006-12-05 16:17:48.912 AO: Broadcasting free space avail
2006-12-05 16:17:48.916 AO: Broadcasting free space avail
2006-12-05 16:17:48.920 AO: Broadcasting free space avail
2006-12-05 16:17:48.924 AO: Broadcasting free space avail
2006-12-05 16:17:48.926 NVP: prebuffering pause
2006-12-05 16:17:48.926 NVP: Waiting for prebuffer.. 0 LDAAAL
2006-12-05 16:17:48.933 AO: OutputAudioLoop: audio paused
2006-12-05 16:17:48.933 AO: 53056 bytes free on soundcard
2006-12-05 16:17:48.937 AO: 53792 bytes free on soundcard
2006-12-05 16:17:48.941 AO: 54560 bytes free on soundcard
2006-12-05 16:17:48.945 AO: 55328 bytes free on soundcard
2006-12-05 16:17:48.949 AO: 56096 bytes free on soundcard
2006-12-05 16:17:48.953 AO: 56864 bytes free on soundcard
2006-12-05 16:17:48.957 AO: 57632 bytes free on soundcard

over and over again.

I searched the archives and found a few other people who have hit these errors
but not in the same scenario as me.  None of them posted a solution though.
Any ideas on how to fix this?  Is it a bug in myth or do I just not have enough
horsepower? I have a Athlon XP 2800, nvidia FX5200 running the latest drivers
(1.0-9629), running svn 12206.

Thanks
Daniel