Matthias Schneider wrote:
Hi,
trying out the video functionality of wengophone-classic (using the cvs version
revision 4179)
with an asterisk server's loopback extension I encountered the following
problem:
Sniffing on the SIP signaling traffic shows the follpwing advertised video
capability in the SDP
part of the INVITE message, indicating a video port of UDP/RTP/10700:
Media Description, name and address (m): video 10700 RTP/AVP 34
Media Type: video
Media Port: 10700
Media Proto: RTP/AVP
Media Format: ITU-T H.263
Media Attribute (a): rtpmap:34 H263/90000/1
Media Attribute Fieldname: rtpmap
Media Attribute Value: 34 H263/90000/1
Interestingly the wengophone debug output reveals that the video port shall be
10602:
...
Starting video stream from port: 10602 to 192.168.134.1:10664
...
which can be confirmed by a netstat -lpn
Proto Recv-Q Send-Q Local Address Foreign Address State
PID/Program name
udp 0 0 0.0.0.0:5060 0.0.0.0:*
16367/wengophone
udp 3224 0 0.0.0.0:10600 0.0.0.0:*
16367/wengophone
udp 0 0 0.0.0.0:10601 0.0.0.0:*
16367/wengophone
udp 0 0 0.0.0.0:10602 0.0.0.0:*
16367/wengophone
udp 0 0 0.0.0.0:10603 0.0.0.0:*
16367/wengophone
So all the returning video traffic from the asterisk server is sent to the port
10700, where
wengophone is not listening. A change of wifo/trunk/eXosip/phapi/phapi.c
/usr/src/wengophone/1.0/wifo/trunk/eXosip/phapi# diff phapi.c.sav phapi.c
365c365
< MY_DLLEXPORT phConfig_t phcfg = { "10600", "", "10700", "",
---
MY_DLLEXPORT phConfig_t phcfg = { "10600", "", "10602", "",
fixes this problem. I wonder how anyone could try out the video functionality
with this mismatch.
Or am I missing a point here?
Nice catch Mattias,
Thanks a lot.
Another issue I do not yet understand correctly is the listen on ports 10601
and 10603 which
should not be necessary if symmetric RTP is used.
10601 and 10603 are for RTCP....
Furthermore I would like to ask about the state
of the mpeg4 / H264 support. Analysing the SDP in the INVITE messages this
capability is not
announced although it is enabled in the configuration dialogue.
David (krp) will answer better than me to that one...
Thanks a lot in advance,
Matthias
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