[Freeswitch-users] audio glitches/clicks when using jitterbuffer with GSM

[Cal Leeming [Simplicity Media Ltd]]

Hi Christian,

I've had a quick look over this report (and we also spoke on IRC a little
while back), but sadly it's beyond my level of experience.

Realistically a ticket is usually picked up by either someone who has an
interest in the subject, or by a core developer based on priority.

So there are three viable options here;

a) Keep trying to fix the problem, mess around with the config, perhaps see
if you can reproduce it in a clean room environment, i.e. in virtual
machines
b) Try and bait the core developers to take a look (you can try the 5-for-1
approach mentioned in [1], or post a bounty [2])
c) See if anyone picks this up

Sorry I couldn't be of any further assistance on this one :/

Cal

[1]
http://lists.freeswitch.org/pipermail/freeswitch-users/2013-June/096500.html
[2] http://wiki.freeswitch.org/wiki/Bounty

On Thu, Jun 20, 2013 at 9:07 AM, Christian Tari <ctpi.list at gmail.com> wrote:

> Hi,
>
> Im having problems with jitterbuffer when transcoding from GSM to PCMa. On
> the incoming (GSM) side we have mobile devices using 3G network and
> generating jitter and packet loss.
> If a packet arrives late or lost, it gets replaced by a high pitch noise
> on the output (PCMa) stream.
>
> I've tested with other codecs (pcmu,opus) on A leg which worked fine.
>
> Settings in dialplan:
> <action application="set" data="rtp_jitter_buffer_during_bridge=true"/>
> <action application="set" data="jitterbuffer_msec=200:200:160"/>
>
> Log,trace,audio are in ticket #5511<http://jira.freeswitch.org/browse/FS-5511>
>
> Could you give me some hints how to make it work?
>
> Thanks in advance,
> Christian
>
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