Many thanks for the help and explanation. I will talk to the vendor of the AVM router about that problem. Because i am not an experienced and good programmer, could someone help me to modify *pjsua* to implement the "fix"? Regards, Ruediger Message: 1 Date: Tue, 2 Oct 2012 20:49:05 +0530 From: Althaf Dev <althaf.dlevel at gmail.com> To: pjsip list <pjsip at lists.pjsip.org> Subject: Re: Bad RTP pt 8 (expecting 9) Message-ID: <CANzTE=QcJCxrtRLRRncoR5BRMzUzGTLjsx2+pvefaOZ3vGy6YQ at mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 It has has something to do with audio CODEC that is being used, m=audio 4000 RTP/AVP 8 98 97 104 3 0 99 9 96 Seems like pjsip is expecting a audio payload type '9' while it is receiving '8' during the RTP audio session. Try to set the 'rx' codec to be of payload type '8'. AV profile from the PJMedia codec framework PJMEDIA_RTP_PT_PCMA = 8, PJMEDIA_RTP_PT_G722 = 9 This mean the RTP audio transmitter is sending PCMA encoded audio while PJSip stack expects G722. So work around is the RTP audio transmitter can't be modified, set pjsip to expect codec 8. Workaround 1) Load PCMA codec via pjmedia_codec_mgr_find_codecs_by_id(codec_mgr, "pcma", &codec_info..) 2) Once step 1 is complete, codec_info will be will filled, and use this codec_info to set "pmedia_stream_info stream_info" ie stream_info.rx_pt = codec_info->pt // which our pcma codec, now pjsip is expecting pcma '8' than 9. ------------------------------ Subject: Digest Footer _______________________________________________ pjsip mailing list pjsip at lists.pjsip.org http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org ------------------------------ End of pjsip Digest, Vol 62, Issue 10 ************************************* -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20121004/94664558/attachment-0001.html>
