I have been looking into WebRTC video/audio call between sipml5.org/call.htm HTML5 client and linphone on linux. WebRTC requires SAVPF, however if you respond to the invite with a 183 SAVP it will fall back and save all the media BUNDLE requirements. Has anyone messed with this? How hard would it be to have linphone respond with a 183 SAVP on incoming RTP/SAVPF INVITEs?