[mythtv-users] Tips for fixing prebuffering pause and WriteAudio: buffer underrun

[Michael Carland]

--- Matthew Phillips <mythtv at mattp.name> wrote:
> On 28/03/2005, at 9:15 AM, Michael Carland wrote:
> 
> > I seem to have all of my install mistakes corrected, except for one.
> >
> > When I play recorded content all is well. But when I play live TV, I 
> > get
> > many  "prebuffering pause" messages, and an occasional "WriteAudio: 
> > buffer
> > underrun". The video stutters during the prebuffering messages.
>
> Hi Michael,
> 
> I had a very similar problem which cropped up after switching to ALSA 
> output. After a long saga of list-trawling, it turned out to be an 
> error with an uninitialised variable in Myth's ALSA audio module (I so 
> wish C++ would regard this sort of thing as an error). After grabbing a 
> patch from CVS and rebuilding, all is fixed.
> 
> The patch against 0.17 is attached. Since we have the same frontend hw, 
> I could look into making the (RPM) binaries available if there's 
> somewhere to drop them.
> 
> Matthew.

Thanks for the patch.

At first, I thought it worked. When I started live tv, 4 pauses and one
underrun where logged, but then it was looking good. That lasted about a
minute, and then it was back to the stuttering.

It's a little confusing, it does not happen recording a program, and it
does not happen when playing a recording, so it's not easy to pin on the
frontend or backend.

May I ask what kind of tuner card you are using?

-Michael



		
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