SDP

SDP (Session Description Protocol - протокол описания сессии) - это текстовый формат для описания peer-to-peer-соединения. SDP содержит описание кодеков, адрес источника и информацию для синхронизации аудио и видео.

Here is a typical SDP message:

 v=0
 o=alice 2890844526 2890844526 IN IP4 host.anywhere.com
 s=
 c=IN IP4 host.anywhere.com
 t=0 0
 m=audio 49170 RTP/AVP 0
 a=rtpmap:0 PCMU/8000
 m=video 51372 RTP/AVP 31
 a=rtpmap:31 H261/90000
 m=video 53000 RTP/AVP 32
 a=rtpmap:32 MPV/90000

SDP is never used alone, but by protocols like RTP and RTSP. SDP is also as component of WebRTC, which uses SDP as a way of describing a session.

Learn more

General knowledge

• WebRTC protocols