Hi Benny, thanks for reply. Yo wrote: > > The SRTP transport supports both RTP/AVP and RTP/SAVP, via the > pjmedia_srtp_use flag. If you set it to PJMEDIA_SRTP_MANDATORY, RTP/SAVP > will be used instead. > But i already use this flag. Look: * pjmedia_srtp_setting_default(&srtp_settings); srtp_settings.use = PJMEDIA_SRTP_MANDATORY; status = pjmedia_transport_srtp_create(med_endpt, udp_transport, &srtp_settings, &srtp_transport);* then we i call *status = pjmedia_transport_encode_sdp(tp, dialog->pool, sdp, NULL, Calls[newId]->media[0].media_index);* i have that issue i wrote. Problem is as i think in ln 1331 in transport_srtp.c: * return pjmedia_transport_encode_sdp(srtp->member_tp, sdp_pool, sdp_local, sdp_remote, media_index);* Because it call encode_sdp from the transport_udp.c. In this file we have definition in ln 40: *static const pj_str_t ID_RTP_AVP = { "RTP/AVP", 7 };* So when the compiler do the check of the transport it use this definition, not one from the transport_srtp.c . I use MSVC compiler, may be it is a problem in compiler :) And also may be we don't need to cal an encode_sdp method from the transport member of the srtp transport? Regards. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20090519/fff42eb5/attachment.html>