Hi all, I need, dont ask why, create invite with sdp setted to zero, something like this: m=audio 0 but when I try to set pjsua_call_settings vid_cnt and audio_cnt to zero its failed, besause it use one of this line to create line origin. Than I try to modify sdp in on_call_sdp_created: 1. pjsua_call_settings audio_cnt = 1 2. pjmedia_sdp_media *p_sdp_media = sdp->media[i]; // memset(p_sdp_media, 0, sizeof(pjmedia_sdp_media)); //if uncoment this line will be assert return p_sdp_media->desc.transport = pj_strdup3(pool, "RTP/AVP"); p_sdp_media->desc.fmt_count = 1; p_sdp_media->desc.media = pj_strdup3(pool, "audio"); p_sdp_media->desc.fmt[0] = pj_strdup3(pool, "0"); but it doesnt work too. Thanks for any advice. Regards, R. Savchenko. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20130916/2543e90a/attachment-0001.html>