[Linphone-users] Re: Incorrect m=video media-field in 200 OK SDP

[Ivan Khvatov]

Hello.

Any comments/ideas? Maybe advice how to report this issue to developers?

Please, help.

On 25.03.2011, at 19:07, Ivan Khvatov wrote:

> Hello all.
> 
> Linphone 3.4.2 in audio mode sends incorrect SDP message on incoming 
> video-calls. Specially, video media-field does not match the RFC4566 grammar.
> 
> Part of SDP message in 200 OK message from Linphone (full trace see in debug 
> logs in footer of this email):
> """
> m=video 0 RTP/AVP
> a=inactive
> """
> 
> media-field grammar:
> """
> media-field =         %x6d "=" media SP port ["/" integer]
>                      SP proto 1*(SP fmt) CRLF
> """
> 
> i.e.: m=<media> <port> <proto> <fmt> ...
> 
> So, at least one "fmt" field is required. By the way, older Linphone (3.3.2) 
> does not put m=video in this case. Linphone 3.4.2 and 3.3.2 uses same version 
> of eXosip2 library (according User-Agent header version is 3.3.0).
> 
> 
> How to reproduce:
> 1. Switch Linphone to "Audio only" mode.
> 2. Make video call to Linphone.
> 3. Answer call on Linphone.
> 
> 
> Actual results:
> Call establishing fails. Remote party did not understand SDP in 200 OK reply 
> and drop call.
> 
> 
> Expected results:
> Successfully established audio call.
> 
> 
> Linphone version: 3.4.2
> Linphone 3.3.2 works fine.
> 
> 
> Debug logs:
> 
> Linphone 3.4.2 debug log (from startup to test call, call failed):
> http://dev.sgu.ru/pub/linphone-3.4.2-audio-only.log
> 
> Linphone 3.3.2 debug log (from startup to test call, successful call):
> http://dev.sgu.ru/pub/linphone-3.3.2-audio-only.log
> 
> I hope that this is right mailing list for this report. If not, let me know.
> 
> -- 
> WBR, Ivan Khvatov
> 

-- 
WBR, Ivan Khvatov