Re: [Linphone-developers] No sound in video call

[Simon Morlat]

Hi Conrad,

From the linphone.log file, I can see that everything goes quite well from the 
linphone point of view, except that it effectively does not receives any 
audio packets.
The ffmpeg warnings on stderr are not a problem.
Perhaps a firewall issue ? Actually I have no idea. Understanding would 
require to understand what is happening at the asterisk side.


Simon

Le Thursday 11 October 2007 23:33:41 Conrad Beckert, vous avez écrit :
> Hi Simon,
>
> ... today my mother had time for a little test :-) Everything was fine
> so far (almost disappointing for not having anything to report
> here :-) ) until I decided to call her.
>
> Then same scenario as before:
>
> 1. what appears on the stderr:
>
> $linphone --verbose>log
> [h263 @ 0xb7304508]rc buffer underflow
> [h263 @ 0xb7304508]rc buffer underflow
> [h263 @ 0xb7304508]rc buffer underflow
> [h263 @ 0xb7304508]warning, clipping 1 dct coefficients to -127..127
> [h263 @ 0xb7304508]warning, clipping 1 dct coefficients to -127..127
> ... and so on ...
> [h263 @ 0xb7304508]warning, clipping 1 dct coefficients to -127..127
> [h263 @ 0xb7304508]warning, clipping 1 dct coefficients to -127..127
> [h263 @ 0xb7304508]rc buffer underflow
> [h263 @ 0xb7304508]rc buffer underflow
> [h263 @ 0xb7304508]rc buffer underflow
> [h263 @ 0xb7304508]warning, clipping 1 dct coefficients to -127..127
> [h263 @ 0xb7304508]warning, clipping 1 dct coefficients to -127..127
> ... and so on ...
> [h263 @ 0xb7304508]warning, clipping 1 dct coefficients to -127..127
>
> (linphone:11922): Gtk-CRITICAL **: gtk_widget_destroy: assertion
> `GTK_IS_WIDGET (widget)' failed
> [h263 @ 0xb7304508]warning: first frame is no keyframe
> [h263 @ 0xb7304508]rc buffer underflow
> [h263 @ 0xb7304508]warning, clipping 1 dct coefficients to -127..127
> [h263 @ 0xb7304508]warning, clipping 1 dct coefficients to -127..127
> ... and so on ...
>
>
> 2. now the log:
> ... see attachment  ...
>
> What I did:
> - my number is 2002, her's is 3101
> - we are both connected to an Asterisk server
> - 3101 calls 2002 with no problems at all (*)
> during my test as documented in the log:
> - 2002 calls 3101 via the same infrastructure
> - images both ways but no sound
> - 2002 calls 3101 once again-> same procedure, same results
> - 3101 calls back - no sound but images...
> - tried to call voice only on the phone -> hung.
>
> What's wrong here? It looks like the Audio RTP packets get stuck somewhere.
> But why do the video ones get through. And why does has this issue occured
> earlier when we connected directly whithout Asterisk. 2002 is on the open
> Internet. 3101 has a NAT router in between which works fine for outgoing
> and incomming rtp once 2002 issues the call. Strange isn't it.
>
>
> Another - probably unrelated point: From time to time 3101 gets a really
> bad noise reminiscent of an old telephone modem. It comes up from time to
> time. (unregularily - somtimes after 10 min, sometimes 20 - once
> immediately - no reproducable scheme ) We have to reconnect.
>
> My soundcard (at 2002) : 00:10.0 Multimedia audio controller: ESS
> Technology ES1969 Solo-1 Audiodrive (rev 02)
>
>
> Thanks for help
> Conrad
>
> Am Donnerstag, den 04.10.2007, 22:41 +0200 schrieb Simon Morlat:
> > Hi Conrad,
> >
> > In this case I could that the problem was actually with the alsa driver
> > totally hung, and enable to record any sound.
> > Send me a log  with --verbose so that I'll confirm .
> >
> > Simon
> >
> > Le Sunday 23 September 2007 00:28:22 Conrad Beckert, vous avez écrit :
> > > Hi,
> > >
> > > has anybody have an idea what's wrong here or at least a hint on how to
> > > fence this issue:
> > >
> > > I use linphone on Ubuntu 6.10 (Efty Eft). I have an Asterisk server to
> > > connect to which I use for voice calling and various Windows-Linphone
> > > endpoints. No problems at all.
> > >
> > > My machine on Ubuntu sometimes causes sound problems: As long as I do
> > > voice calling, everything is ok. Videocalls sometimes come without
> > > sound in both ways.
> > >
> > > It is obviously no routing issue as images get transfered with no
> > > problems at all. Only sound is missing. Sometimes it helps to try again
> > > - the 5th 6th or something attempt might be successful.
> > >
> > > I upgraded from 1.7.xx to 1.99.2 from buildserver.net as I suspected an
> > > issue with this particular version - no avail (1.99 as Beta is less
> > > stable - the sound issue continues)
> > >
> > > I suspect some codec woes but have no idea how to find out, what's
> > > wrong. Do you have an idea? Is there a way to trace - to see what
> > > happens?
> > >
> > > Thanks for help
> > > Conrad
> > >
> > > PS: This is a version (both 1.7.xx. and 1.99) of which the local
> > > (mirror) images are just funny greem squares. I wonder what's this (got
> > > a Philips PWC cam, I remember having experienced this before and solved
> > > it by a different cam)
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
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