Hi, It seems that the ptime information that is set in a codec is not added to the SDP offer (endpoint#pjmedia_endpt_create_sdp()). I guess this can be done by retrieving the ptime information from codec_param.info.frm_ptime . Best regards, javier -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: endpoint_ptime_from_codec.patch URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20081023/056e36c3/attachment.patch>