Hi all, with some code changes I can send a request,from PJSIP,an H264 one way session with another peer capable to send this kind of video codec (in both packetization mode). Furthermore I can receive a request from the peer that wants to stream an H264 one way session to PJSIP. In both case I use mplayer (with live555) to display the one way H264 session, thanks to SDP feature available. I've not added X264 enc/dec library, but it could be great. Cheers Emanuele