[mythtv-users] Tips for fixing prebuffering pause and WriteAudio:
buffer underrun
Michael Carland
mcarland at yahoo.com
Mon Mar 28 13:52:31 UTC 2005
--- 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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