Most of the missing features are AVPF related, which is defined in RFC4585 and RFC5104. RFC4585: Extended RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback (RTP/AVPF) https://www.rfc-editor.org/rfc/rfc4585.txt RFC5104: Codec Control Messages in the RTP Audio-Visual Profile with Feedback (AVPF) https://www.rfc-editor.org/rfc/rfc5104.txt AVPF contains a mechanism for conveying such a message, […]
SDP
Facing a new task of standardizing SIP protocols for the Kedacom conference Endpoints. So I digged into some RFC document recently. Here are some key notes for RFC3264: An OfferAnswer Model with the Session Description Protocol (SDP) 1. Capatibility comparison – Direction —————————————– If “a=sendrecv” attribute does not exist, or […]