Re: [Linphone-developers] oRTP question

[Simon Morlat]

Hi,

Please have a look at those test programs embedded with ortp sources:
oRTP/src/tests/tevrtpsend.c
oRTP/src/tests/tevrtprecv.c
It seems that the telephone_event payload type is not set in the RTP profile 
used by the session.

Simon

Le Sunday 09 December 2007 14:24:57 Henning Christiansen, vous avez écrit :
> Hi,
> I have got a question abour oRTP.
>
> I establish a SIP connection qnd transfer RTP packets between both ends.
>
> RTP transfer is started like this:
>
>      rtpSession = rtp_session_new(RTP_SESSION_SENDRECV);
>      rtp_session_set_scheduling_mode (rtpSession, 1);
>      rtp_session_set_blocking_mode (rtpSession, 1);
>      rtp_session_set_profile(rtpSession, &av_profile);
>      rtp_session_set_jitter_compensation(rtpSession,
>                           
> pSipua->sipServer[usedSIPServer].jitterCompensation);
> rtp_session_set_local_addr(rtpSession, pSipua->localIP,
>                                 pCsd->localRTPPort);
>      rtp_session_set_remote_addr(rtpSession,
>                                 pCsd->remoteSDPAudioIP,
>                                 pCsd->remoteRTPPort);
>      iRetVal = rtp_session_set_payload_type(rtpSession, pCsd->rtpPayload);
>
> During this connection I would like to transfer DTMF packets according to
> RFC 2833. This is done with a call to procedure
>
>      rtp_session_send_dtmf(...).
>
> This procedure call fails (returns error code), and there is an indication
>
>    "telephonyevents.c:74- assertionsession->telephone_events_pt!=-1failed
>
> I see from the documentation that RFC2833 transfers are not working "if the
> session cannot support telephony events".
>
> My questions:
>
> 1. How can I configre the session to support tis type of events?
> 2. Can I do this one when starting the communication after
> "rtp_session_new"? 3. Or do I have to toggle between both modes, i.e.
> activate/deactivate the support with every DTMF digit to be sent?
>
> Thank you very much for your support!
>
>
>
>
>
>
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