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

[Justin Smith]

> 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

Hi Mike,

Thanks for the suggestions. I did say in my original email that I'd 
already gone through this prebuffering page on the wiki without 
success... :)

How can I tell if PulseAudio is enabled? Running ps -ef | grep audio 
suggests its not running. I'm using a vanilla MythBuntu Karmic AMD 64 
distribution - surely they would be disabling it if MythTV does not work 
with it?

Cheers,
Justin.