[mythtv-users] Does time stretch make your MPEG-2 sound gurgle?

Mark Kundinger mkundinger at yahoo.com
Thu Oct 20 12:03:00 EDT 2005



--- "Joseph A. Caputo" <jcaputo1 at comcast.net> wrote:

> On Thursday 20 October 2005 1:40, Mark Kundinger wrote:
> > Hi list,
> > 
> > If I time stretch a recording, the audio seems to get "gurgly"
> (minor,
> > sporadic, pitch or tempo changes).  This is most notable with
> programs
> > that like to do big dramatic musical scores with lots of violins 
> > (think 
> > West Wing).  The strange part is that even if I set the time
> stretch
> > back to 1.0, the gurgling is still there.  However, if I exit back
> to
> > the menu and re-view the recording, sound is fine.
> > 
> > Most of my recording is done on a PVR-250, so the recordings are
> > MPEG-2.  I have a MJPEG recorder too, and it doesn't *seem* that
> the
> > problem still exists there, although I'm not positive, because I
> don't
> > have as many recordings for that.  For sound output, I'm using the
> > Nforce2 sound on my motherboard with Nvidia's driver.
> > 
> > So, anyone else seen this?  Right now I have no idea where the
> problem 
> > lies. 
> 
> What decoding method are you using to play back your MPEG-2
> recordings 
> (normal/ffmpeg, libmpeg2 or XvMC) ?
> 

Ooh, that's a very good question.  I have no special options selected,
so I'm using normal/ffmpeg.  And I am using a SVN from a week or two
ago.  I can try out libmpeg2 on my next tv watching bout.


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