[pjsip] Audio Stuttering in SVN?

Benny Prijono bennylp at pjsip.org
Thu Apr 3 18:23:13 EDT 2008

On Thu, Apr 3, 2008 at 10:58 PM, Norman Franke <norman at myasd.com> wrote:
> Unfortunately, that's going to be hard. I can let our folks use this
> normally since it makes some calls impossible to hear, but not all. I can
> try to reproduce it on my end, though. As someone mentioned, it may have
> something to do with loud audio. Not sure. I'll see what I can find out.

A little bit more info. We did two quite major fixes in the last few
weeks. First is related to audio buffering to cater audio burst in
sound port, the bridge, and splitcomb (using something called
delaybuf, which utilizes another thing called wsola, all of them are
new). We don't think this would cause the stutter, and in fact the
purpose of this fix is to remove the stutter altogether!

But there is a second fix that we did that may cause the stutter, that
is the modification in the jitter buffer to improve the delay (ticket
http://trac.pjsip.org/repos/ticket/505, which I just re-opened). If
this is the reason, then the log should display something about jitter
buffer operation when the stutter happens.

If it's too hard to get a log, maybe you can rollback the jitter
buffer to the revision before ticket #505 and see if this is really
the culprit.


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