Hi, I am working on a Media Proxy app which will do the RTP(Encode/Decode) plus RTCP message translation between two servers. The questions i have are :- 1) I will have to create 2 streams (on top of 2 transports) talking to each of the two servers. But i am confused about Get_Frame/Put_Frame callbacks and on_rx_rtp/on_rx_rtcp callback. which one i have to use?? What is the difference between the two and when to use each? Similarly when we shall use pjmedia_port_get_frame() & pjmedia_port_put_frame() OR pjmedia_transport_send_rtp() & pjmedia_transport_send_rtcp()? Can we use on_rx_rtp/on_rx_rtcp? with streams too? 2) As pjmedia_stream_create, calls the "pjmedia_transport_attach" and assigns its own on_rx_rtp/on_rx_rtcp callbacks? Do i have to again call "pjmedia_transport_attach" in my application code and give my own on_rx_rtp/on_rx_rtcp callbacks to receive rtp/rtcp? Wud really appreciate help on the above. Regards, Manjeet -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20090128/af221419/attachment.html>