Cross Session Stream Identification in the Session Description Protocol

Document Type Replaced Internet-Draft (individual)
Author Harald Alvestrand 
Last updated 2013-02-20 (latest revision 2012-12-13)
Replaces draft-alvestrand-rtcweb-msid
Replaced by RFC 8830
Stream (None)
Intended RFC status (None)
Expired & archived
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Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Replaced by draft-ietf-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This Internet-Draft is no longer active.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 between media streams within different RTP sessions as well as within a single RTP session. 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 signaling. This document is an input document for discussion. It should be discussed in the MMUSIC WG list,


Harald Alvestrand (

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