title: Port for sending rtcp receiver reports
body: <p>If I am receiving a rtp stream, which port do I send rtcp receiver reports? For example if I use an SDP to negotiate a receive only stream with the server say through SIP, I would only specify my ports for receiving rtp and rtcp streams. How should the server respond. It only needs to send rtp sterams. So it can choose any port on its end of the socket. How should it specify the rtcp port on which it would be listening to rtcp receiver report?</p>