[Freeswitch-users] For all

Hi, I would like to use my own equipment for the endpoints transcoding not by freeswitch. So I want to modify the sdp. The media stream to point to the transcoding device. Is there anyway of modifying o= and c= in sdp protocol? (modify ip and port of rtp server in sdp) How to modify the sdp with in C code. Other methods to achieve it? Any idea? Thanks ! best regards!