[mythtv-users] video stutter with VDPAU and 1080i DVB

[Michael T. Dean]

On 01/09/2010 11:11 AM, Justin Smith wrote:
> I get a slight but annoying stutter in video playback of live TV on my 
> mythTV box and I was wondering if anyone had any ideas on how to 
> troubleshoot this. It only occurs for one 1080i HD DVB channel - other 
> HD channels are fine (FWIW: Ch9 HD in Australia).
>
> The stuttering is confirmed in the frontend log (-v playback) with 
> lines like this:
>
> NVP(6): Video is 3.19567 frames behind audio (too slow), dropping 
> frame to catch up.
>
> When I set the audio output device to NULL, the stuttering (and log 
> lines) disappear. But as I'm not too good at lip reading... :)
>

I'd start with: 
http://www.mythtv.org/wiki/Troubleshooting:Prebuffering_pause .  Also, 
make sure you're not using PulseAudio.

Mike