Thanks Nanang for the link, I have also discovered this page : http://trac.pjsip.org/repos/wiki/3rd_Party_Media. This appeared very interesting to me, I'd like to use "Reusing PJMEDIA's Session Info" chapter since it seems to correspond with what I want to do (I don't implement any real codec, VLC take care of that for me and I would like to modify pjsua to launch VLC, I just need to put codec information in SDP). However it is written that this method "still can only work with PJSIP (and not PJSUA-LIB)". Does it mean that I will not be able to modify pjsua to use VLC that way ? If not is there a easier way to implement extra codec information in SDP than building the SDP manually ? Thank you for your interest, Damien -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080410/d070681e/attachment.html