[mythtv-users] Major Audio Sync Issues

Paulin paulin at spextreme.com
Wed Nov 18 22:23:17 UTC 2009


On Tue, Nov 17, 2009 at 9:46 PM, greg <greg12866 at nycap.rr.com> wrote:

> On Tue, 2009-11-17 at 21:08 -0500, Paulin wrote:
> > I'm been banging my head against the wall on this issue for a couple
> > of days now.  I've search the thread and google for anything I can
> > find on Audio Out Of Sync and I've tried a ton things.   No luck with
> > any of it.
> >
> >
> > I upgrade last week to Mythbuntu 9.10 (myth 0.22).  I'm using VDPAU.
> > Before upgrading I didn't really have this issue.
> >
> >
> > When I say upgraded I basically wiped the disk and started fresh.
> >
> >
> > Anyway now the Myth Recordings that are occurring seem fine.  However
> > when playing back the audio and video become out of sync.  I've
> > noticed that the video will attempt to slow down to let the audio
> > catch up but it never stays there.  They get out of sync and
> > evenytually get really bad (few seconds).
> >
> >
> > I've tried changing the player to VLC, I also tried the suggestion on
> > (
> http://mythtvbox.blogspot.com/2006/01/fixing-mythvideos-audiovideo-sync.html)
> and put oss on the mplayer command string.  I also setup XvMC per the wiki
> page.  Didn't change anything.
> >
> >
> > My first question is, how do I enable extended logging on myth
> > frontend using mythfrontend.real.   I remember something about adding
> > the parameter 'playback' but not sure how to do that with
> > mythfrontend.real.
> >
> >
> > Second why is my audio/video so out of sync? How do I track down the
> > problem and fix it.
> >
> >
> > Thanks
> > steve
> >
> >
> > _______________________________________________
> > mythtv-users mailing list
> > mythtv-users at mythtv.org
> > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>
>
> I don't know if this is the problem or not,but in the past pluseaudio
> had to be disabled.If it wasn't it would create the exact problems you
> are exhibiting .. If you have pluseaudio enabled try removing it and see
> if that  helps...
>
> Here is how i have my frontend logging setup..
> Use this script:
> #/bin/sh
>  mythfrontend > /var/log/mythtv/mythfrontend.log 2>&1 &
>
> 1. Make an empty text file in /var/log/myth mythfrontend.log
> 2. Put the script some place in your path :echo $PATH
> 3. Make the script executable..
> 4. Put the command to run the script in a launcher or automate the
> launching how ever you see fit....
>
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> mythtv-users at mythtv.org
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>
>
Don't have pulseaudio installed (according to apt-get remove).  So that
isn't it.

Thanks for the logging tip. I'll try that.
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