RFC 3550 RTP July 2003 2.2 Audio and Online video Convention If the two audio and video clip media are used in a meeting, They're transmitted as separate RTP classes. That's, separate RTP and RTCP packets are transmitted for every medium employing two various UDP port pairs and/or multicast addresses. https://net33-rtp76655.angelinsblog.com/29325286/the-smart-trick-of-net33-rtp-that-nobody-is-discussing