[Asterisk-Users] Video phones probem

[Olle E Johansson]

20 jun 2006 kl. 14.28 skrev Mindaugas Kuprys:

> Video started to work. Now intresting thing is that video size is  
> half reduced than calling directly from phone to phone. Phones:  
> Tatung tia-8800.  I have attached  sip messages. that else might be  
> important..?  one of phones is behind nat.
>
The reason for the half size is that we do not support the fmtp:  
header yet. If you want to join in the work with enhancing
the video support we have a developer's list at asterisk-video, see  
http://lists.digium.com

Thanks for the debug, it helps. In svn trunk, we have improved video  
support a bit, so that Asterisk won't offer
another video codec on the outbound call like in this dialog,  
considering we don't transcode video.

/Olle
>

Btw: The following packet indicates to me that the SIP firmware in  
this phone is rather buggy:

> U 217.9.241.234:5060 -> 217.9.241.227:5060
> SIP/2.0 200 OK.
> From: "Giedrius"<sip:giedrius at 217.9.241.227>;tag=as009e18fc.
> To: <sip:minkpr at 217.9.241.234:5060>;tag=0-13c4-7fa-1f0bc6-74fe10e7.
> Call-ID: 23d7e97103aa79695c74874b1cbb69ea at 217.9.241.227.
> CSeq: 102 INVITE.
> Allow: INVITE,ACK,CANCEL,BYE,OPTIONS.
> User-Agent: TTIC Video phone.
> Via: SIP/2.0/UDP 217.9.241.227:5060;rport=5060;branch=z9hG4bK198aadad.
> Contact: <sip:minkpr at 217.9.241.234:5060>.
> Content-Type: application/SDP.
> Content-Length: 723.
> .
> v=0.
> o=Server 2890844527 2890844527 IN IP4 217.9.241.234.
> s=session.
> c=IN IP4 217.9.241.234.
> t=0 0.
> m=audio 6070 RTP/AVP 0 4 97 8 18 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:4 G723/8000.
> a=rtpmap:97 telephone-event/8000.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:18 G729/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:0 PCMU/8000.
> m=video 6072 RTP/AVP 34.
> b=AS:768.
> a=fmtp:34 CIF=2 QCIF=1 MaxBR=7680.
> a=sendrecv.
> a=rtpmap:34 H263/90000.