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?
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. 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.
Thanks a lot in advance,
Matthias
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