RFC 3388 · PROPOSED STANDARD · 2002

Grouping of Media Lines in the Session Description Protocol

Overview

RFC 3388, “Grouping of Media Lines in the Session Description Protocol”, is a Proposed Standard document published in December 2002 by G. Camarillo, G. Eriksson, J. Holler, H. Schulzrinne. It has been obsoleted by RFC 5888 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.

Abstract

This document defines two SDP attributes: 'groupe' and 'mid'. They allow to group together several 'm' lines for two different purposes: for lip synchronization and for receiving media from a single flow (several media streams), encoded in different formats during a particular session, in different ports and host interfaces.

Abstract as published in the RFC, via rfc-editor.org.

What “Proposed Standard” means

An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.

Read this RFC

The canonical text of RFC 3388 is hosted at rfc-editor.org. Available in TXT,HTML.

Relationships to other RFCs
Obsoleted by
RFC 5888
Other RFCs from 2002

Who Is Online

In total there are 65 users online: 0 registered, 57 guests and 8 bots.

Most users ever online was 5,555 on 17 Jul 2026, 3:23 am.

Bots: AhrefsBot Applebot Baiduspider Bingbot Majestic Other Bot PetalBot SemrushBot

Users active in the past 15 minutes. Total registered members: 372