[mythtv-users] 0.24-fixes, upgraded, VDPAU - LiveTV playback is choppy, watching as recording is ok

[Kevin Ross]

On 11/30/2010 01:37 PM, Dave Richardson wrote:
> Like so many open threads these days, I'll also say "on 0.23 - with 
> the same hardware - this was working..."  :-)
>
> I have my HD local channels QAM thru HDHR with multirec enabled.  
> Audio is SPDIF ALSA, passthru enabled.  0.24-fixes upgraded recently.
>
> I have noticed that watching LiveTV for local HD broadcasts is very 
> choppy (both video and audio).  It never syncs up to smooth playback.  
> Some channels differ in the degree of choppiness.  Does not appear to 
> differ if I choose another HDHR tuner.
>
> System utilization (via 'top' or 'w') on a 2-core dedicated ION FE 
> less than .90 at all times and generally less than .60 while I see the 
> issue.
>
> I'm not seeing streams of errors in the mythfrontend.log
>
> What confuses me is that if I record that same program/channel and 
> watch the recording (even while recording is still active) the 
> playback is great.
> All other video media playback fine.
>
> I don't understand why LiveTV playback seems to have different 
> "performance", what should I be checking please?
>
> TIA!!!

I can think of a couple differences between LiveTV and Recordings. You 
can configure different storage locations for Live TV and Recordings. 
You can have different Recording Profiles for LIveTV and Recordings.  
Not sure what else could be different.  Does pausing for a few seconds 
and resuming help at all?