[mythtv-users] VDPAU playback issues

HP-mini blm-ubunet at slingshot.co.nz
Sun Nov 4 18:18:38 UTC 2012

> Thanks. I read on the wiki that for glitch-free playback you should
> only use the 295 series drivers, as something changed in the 3xx
> series which meant that glitch free would not work. That's why I'm on
> the 295 driver still. I've also tried the VDPAU Normal profile but it
> has made no difference to this problem.
Haven't noticed this problem (yet).. 
Sounds like a composite effects interaction (unity compiz etc).
> So from the replies I've had there doesn't seem to be anything
> specifically wrong with my mythtv setup, which is a releif :). This
> problem is specific to certain mkv files, and those same files also
> play jerkily in mplayer (which also uses ffmpeg) so I don't think it's
> actually a mythtv issue.
> Does anybody know of any tools which could look for problems in the
> files I'm having trouble with? I've tried loading them into avidemux
> but that loads them fine. I'm just intrigued as to why some files are
> maxing out the CPU and some apparently identical ones are not.
If your vdpau decoder does not support your media format then CPU decode
is used.

MPEG4-ASP DivX Xvid are only supported from 2xx series vdpau.
The 1st gen ION & 8400/9400/etc have some resolution

You could probe the files with ffprobe or mediainfo.
The nVidia driver readme tables the vdpau limitations in appendix A.

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