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

[Conrad Beckert]

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)
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > _______________________________________________
> > Linphone-developers mailing list
> > address@hidden
> > http://lists.nongnu.org/mailman/listinfo/linphone-developers
>

linphone.log
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