[mythtv-users] Re: mplayer audio sync issues

Axel Thimm Axel.Thimm at atrpms.net
Mon Jun 6 18:29:46 UTC 2005

On Mon, Jun 06, 2005 at 09:52:09AM -0600, Adam Gianola wrote:
> Yes this is exactly the problem, and its been easily corrected for me
> with the -delay option.  I also noticed it happened after an 'apt-get
> dist-upgrade' and I'm pretty sure alsa was updated then (as well as
> most mythtv packages).  The alsa rpms I'm running must be:
> alsa-kmdl-2.6.10-1.770_14.rhfc3.at-1.0.9rf-39.rhfc3.at 
> alsa-driver-1.0.9rf-39.rhfc3.at and alsa-utils-1.0.9rf-14.rhfc3.at 
> alsa-lib-1.0.9rf-21.rhfc3.at
> libasound2-1.0.9rf-21.rhfc3.at
> which look like the current versions on atrpms.  i'm not entirely sure
> what the old versions were, but it had been at least 2 weeks or so
> since the last dist-upgrade.  I haven't looked at the atrpms list, but
> i'm cc'ing this message to that list in the hopes that the right
> people notice this and may be able to comment if it is an rpm problem
> or not.
> FWIW, my mainboard is
> SOYO SY-P4RC350 Socket 478 ATI 9100IGP (RS300) Micro ATX Intel Motherboard
> with onboard sound 
> ATI Technologies Inc IXP150 AC'97 Audio Controller
> Thanks,
> Adam
> ps. is there a simple way to list the previously installed alsa
> packages or downgrade?  my mind is failing me right now...


rpm -qa --qf '%{name}-%{version}-%{release}.%{arch}.rpm\n' 2>&1 | sort > /tmp/rpmpkgs
ls -ltrA /var/log/rpmpkgs* /tmp/rpmpkgs
diff -ud /var/log/rpmpkgs /tmp/rpmpkgs

But I can't imagine alsa delaying sound. It has to be an issue with
the client application. Perhaps the ABI changed in an incompatible

FWIW I don't see (well, hear) any such delays.

> On 6/5/05, Marshall Crocker <marshall at iconux.org> wrote:
> > I had the exact same problem last week after updating from at-rpms.  A
> > number of packages were updated but I noticed that alsa was one of them
> > so maybe it's the cause? It seems that only divx/xvid files are the
> > problem though.  No problems with any other formats so far.
> > 
> > I haven't had any luck tracking the problem down but I may downgrade
> > alsa and see what effect that has.  Has your alsa recently been updated?
> >   If so what were the previous and current versions?
> > 
> > Marshall
> > 
> > Adam Gianola wrote:
> > > Hey folks,
> > > Maybe I'm hallucinating (it is entirely possible), but suddenly when I
> > > am watching videos using mplayer in 'watch videos' my audio is out of
> > > sync with the video.  If I manually adjust to +0.275s by adding
> > > '-delay 0.275' to the mplayer command line, it looks better.  This
> > > only seems to happen with videos played using mplayer (xvid avis in
> > > particular), but when I watch recorded videos (from pvr 250) they are
> > > fine.  This only started happening in the last few days, before this,
> > > videos which have the mismatch worked fine.  I'm just curious if
> > > anyone else has seen this recently.  I've got a FC3 setup using
> > > ATRPMS.
> > > Thanks,
> > > Adam

Axel.Thimm at ATrpms.net
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