[mythtv-users] HD video (just "Lost TV show") slows down during play/sound unsyncs

Marc MERLIN marc_mtv at merlins.org
Wed May 5 05:48:00 UTC 2010

On Tue, Feb 23, 2010 at 09:39:51PM -0800, Marc MERLIN wrote:
> On Wed, Feb 17, 2010 at 01:06:40PM -0600, Goluboff wrote:
> > > I can't quite figure that out. I have mythtv 0.21.0+fixes19961-0ubuntu8.
> > >
> > > I've had it working for a long time. HD shows like Heroes and 10 other kinds
> > > record and play fine (recorded through HD Homerun).
> > > Lost used to be fine, but this season, playback has been bad: the picture
> > > slows down and then catches up from time to time while the sound gets out of
> > > sync on my main frontend.
> > > I checked that my CPU usage is only 30% (dual core duo 3GHz), and I'm
> > > playing with xv.
> > >
> > > I've tried playing the same show on my laptop and the picture still slows
> > > down and speeds up a bit, but the sound doesn't seem to get out of sync
> > > there.
> > >
> > > Any clue what might be going on?
> > 
> > Are you running mythcommflag during the recording? I used to have the
> > same problem you had, and then went to setup and set it to run
> > mythcommflag after the recording, and that's been fixed now.
> > 
> > I'm not sure why, it might be an issue of not being able to write to
> > disk fast enough (to both the recording and the seektable), but maybe
> > you should try it out. The downside is you won't have commercial
> > detection until after the recording is done.
> Thanks for the tip, it might indeed be just that.
> It took me a while to find the setting, which for some reason is hidden in
> mythtv-setup, but I'll see if it works better for next week.

For the sake of the archive the fix was to upgrade from mythtv 0.21 to 0.23:
it was mythplayer that was having playback issues (I found out after running
mplayer on a lost recording that mythplayer just couldn't play right and
mplayer worked fine).

"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems & security ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/  

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