Re: playback speed?

Tue Jan 06 2004, Pete Yadlowsky wrote:

> On Tuesday 06 January 2004 12:09 pm, you wrote:
> >
> > This sounds strange. Is it just the video playing double speed but the
> > audio is at normal speed?
> 
> When it happens, video and audio both play at double speed.
> 
Ok, this make sense in a way. We sync to the audio so if it plays
faster then the video will too.
Why the audio is playing too fast is another question. Maybe
the samplerate gets set incorrectly, but this should happen on all dvds
not just some. More likely is that the difference is how many channels
the audio track has. If we open the audio card in 4 channels and
the audio driver is buggy then we might get audio playing at double speed.

What audio card do you have and which one of alsa and oss are you using?
To find out if this is the problem you can edit the oglerc file and
change the <speakers> section to just contain:
      <channel_config>
        <chtype>Left</chtype>
        <chtype>Right</chtype>
      </channel_config> 
This will force ogle to only open 2channels on the audio card.
If the dvd plays in normal speed now we know where the problem is.

> playing normally, others at double speed. The one home-made disk I've tried 
> plays at double speed. Unfortunately, I only have a small number of samples 
> to test.
Does the home-made one have more than 2channel audio?



/Björn