Cross Session Stream Identification in the Session Description Protocol

Document Type Replaced Internet-Draft (individual)
Last updated 2012-11-20 (latest revision 2012-05-29)
Replaced by draft-alvestrand-mmusic-msid
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document specifies a grouping mechanism for RTP media streams that can be used to specify relations betweeen media streams within different RTP sessions. This mechanism is used to signal the association between the RTP concept of SSRC and the WebRTC concept of "media stream" / "media stream track" using SDP signalling. This document is an input document for discussion. It should be discussed in the RTCWEB WG list,


Harald Alvestrand (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)