[mythtv-users] Jerky playback on BBC HD Chennels

[Fred Watt]

On 19/01/13 17:15, Jason Kitching wrote:
> Recently developed a problem with jerky playback on BBC HD channels.
>
> Whether it's Livetv or pre-recorded, including historic recordings 
> that up until earlier in the week played back correctly, but now the 
> playback is juddery, jerky.
> It looks similar to how a 50hz file would play if the resolution was 
> set to 60hz
>
> Other HD channels such as ITV1 HD and Ch4 HD play back smoothly and so 
> do other HD formats such as 24p blu-ray ripped files and non HD channels.
>
> I've tried changing the deinterlacer, switched from VDPAU 
> High/Normal/Slim.
>
> I've also re-installed the Nvidia drivers.
>
> Before I go and waste another £100 on a replacement card, just 
> wondered if there's anything I may have missed, or test the card to 
> see if that is where the fault lies?
>
> mythtv version is fixes/0.26.0-82-g8f8274a
>
> Graphic card is Nvidia Geforce GT430
>
> Jason
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://www.mythtv.org/mailman/listinfo/mythtv-users
Have you checked the mythbackend.log for errors during playback?  I have 
had problems before with BBC and the writing of errors to the log file 
actually was causing the stutter as the disk was being thrashed?

Also it might be something to do with audio as the BBC HD use AAC - the 
others use AC3/Dolby - so if there is a problem decoding audio you would 
only see it on the BBC, and it could cause a stutter.

What device do you use for audio out?