Re: [Linphone-developers] Found bug in handle unknown media stream

[Peio Rigaux]

Hello Evgeny.

Sorry for the belated reply.

Interoperability issues are hard and long to resolve...

I have not enough knowledge on the concerned part of code to investigate this.

As far as I understand you want to interoperate Liblinphone with a server using H224 (for far-end camera control?).

Unfortunately, we do not support rfc4573, so I doubt that giving this payload type will work.

That said, you should still have sound coming, as we are supposed to ignore the unknown stream.

This might be a bug on our side, but as this scenario is unusual I don't think that we can take time to investigate this for free...

If you really need it we can assist you for a fee (click on "Contact us", and describe the issue).

Regards,

Peio Rigaux
Junior Software Engineer
Belledonne Communications, the company behind Linphone
Linphone.org

Le 09/10/2020 à 13:12, Evgeny Nesterov a écrit :

> Hello!
>       
>       
>       As it appears i found bug in library. When server in invite
>       session send media stream "application", library think that this
>       is audio stream, what is causing the problem under Android.
>       
>       
>       Server send invite message:
>       
>       
> > INVITE sip:138@81.200.17.190:34090 SIP/2.0
> >         
> >         Via: SIP/2.0/UDP
> >         178.76.234.90:5060;branch=z9hG4bK74da54d1;rport=5060
> >         
> >         Contact: <sip:178.76.234.90;transport=UDP>
> >         
> >         To: <sip:138@81.200.17.190:34090>
> >         
> >         From: "132" <sip:132@178.76.234.90>;tag=as477f9fb
> >         
> >         Call-ID: 2e28ada327693177239117a54ee43039@178.76.234.90
> >         
> >         CSeq: 102 INVITE
> >         
> >         User-Agent: VINTEO 2.0.0
> >         
> >         Max-Forwards: 70
> >         
> >         Date: Fri, 09 Oct 2020 10:25:52 GMT
> >         
> >         Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE,
> >         NOTIFY
> >         
> >         Content-Type: application/sdp
> >         
> >         Content-Length: 516
> >         
> >         
> >         v=0
> >         
> >         o=root 21505 21505 IN IP4 178.76.234.90
> >         
> >         s=session
> >         
> >         c=IN IP4 178.76.234.90
> >         
> >         b=CT:1536
> >         
> >         b=AS:1536
> >         
> >         t=0 0
> >         
> >         a=vnd.vinteo.fec:v=2.0.0
> >         
> >         m=audio 20014 RTP/AVP 0 101
> >         
> >         a=rtpmap:0 PCMU/8000
> >         
> >         a=rtpmap:101 telephone-event/8000
> >         
> >         a=silenceSupp:off - - - -
> >         
> >         m=video 20016 RTP/AVP 99
> >         
> >         b=AS:1536
> >         
> >         b=TIAS:1536000
> >         
> >         a=content:main
> >         
> >         a=label:2
> >         
> >         a=rtpmap:99 H264/90000
> >         
> >         a=fmtp:99 profile-level-id=42001F
> >         
> >         a=rtcp-fb:* nack pli
> >         
> >         a=rtcp-fb:* ccm fir
> >         
> >         a=sendrecv
> >         
> >         m=application 20020 RTP/AVP 100
> >         
> >         a=sendrecv
> >         
> >         a=rtpmap:100 H224/4800
> >         
> >       
>       After this we can see in logs (show only significant lines):
>       
>       
> > 2020-10-09 13:28:01:430 [liblinphone]
> >         MESSAGE Found payload H224/4800 fmtp=
> >         
> >         2020-10-09 13:28:01:436 [liblinphone] MESSAGE Created stream#0
> >         [audio] in state [Stopped]
> >         
> >         2020-10-09 13:28:01:444 [liblinphone] MESSAGE Created stream#1
> >         [video] in state [Stopped]
> >         
> >         2020-10-09 13:28:01:448 [liblinphone] MESSAGE Created stream#2
> >         [audio] in state [Stopped]
> >         
> >         2020-10-09 13:28:03:182 [liblinphone] MESSAGE Declining mline 2,
> >         no corresponding stream in local capabilities description.
> >         
> >       
>       
>       Stream #2 has type 'audio', though it must be of type 'other'. I
>       don't know why, but this error causes that there is no incoming
>       sound on android.
>       
>       
>

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Description: application/pgp-keys

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Description: OpenPGP digital signature