[mythtv] 'WriteAudio: buffer underrun' during playback caused bythe scheduler

Lueddich at gmx.de Lueddich at gmx.de
Thu Sep 14 06:16:30 UTC 2006

Hey Mark,

using 'ALSA:default' I don't get 5.1 to work. 2 channel mode is OK, but with a 6 channel stream, I am only able to listen to fl and fr, the other speakers are dead. But the working speakers do really play only the fl and fr, so there is no speech for example... Using '/dev/dsp', I have the problems with 2 and 6 channel mode...

If I should test anything with a special file and post some logs, just say so!! ;)


-------- Original-Nachricht --------
Datum: Thu, 14 Sep 2006 08:35:50 +1000
Von: "Mark Spieth" <mark at dclabs.com.au>
An: "Development of mythtv" <mythtv-dev at mythtv.org>
Betreff: Re: [mythtv] \'WriteAudio: buffer underrun\' during playback caused	bythe scheduler

> > Sorry, the other way round: 'ALSA:default' comes back to live,
> '/dev/dsp' 
> > dies...
> >
> >Jan Kleinig schrieb:
> >Got it working now using 'Video timing method: RTC', but I still have the
> >same probs... I found out that using >sound device 'ALSA:default' does
> end 
> >with no sound and a lot of 'WriteAudio: buffer underrun' in the log,
> >while 
> >using '/dev/dsp' stumbles with the picture and logging the same 
> >'WriteAudio: buffer underrun', but it >comes back to live after about 2 
> >seconds...
> is this in 6 channel mode or 2 channel mode? if in 6 ch mode can you try
> the 
> same thing in 2 ch mode
> when I tested it seemed ok in 6 channel mode. doesnt mean there is nothing
> wrong though.
> I have to find time to test this again. weekend hopefully
> cheers
> mark
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