Annotated Example SDP for WebRTC
draft-ietf-rtcweb-sdp-14
Document | Type | Active Internet-Draft (individual) | |
---|---|---|---|
Authors | Suhas Nandakumar , Cullen Jennings | ||
Last updated | 2020-12-17 | ||
Replaces | draft-nandakumar-rtcweb-sdp | ||
Stream | IETF | ||
Intended RFC status | Informational | ||
Formats | plain text xml pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Ted Hardie | ||
Shepherd write-up | Show (last changed 2018-10-04) | ||
IESG | IESG state | IESG Evaluation::AD Followup | |
Consensus Boilerplate | Yes | ||
Telechat date |
Has a DISCUSS. Has enough positions to pass once DISCUSS positions are resolved. |
||
Responsible AD | Murray Kucherawy | ||
Send notices to | Ted Hardie <ted.ietf@gmail.com> | ||
IANA | IANA review state | Version Changed - Review Needed |
Network Working Group S. Nandakumar Internet-Draft C. Jennings Intended status: Informational Cisco Expires: 20 June 2021 17 December 2020 Annotated Example SDP for WebRTC draft-ietf-rtcweb-sdp-14 Abstract The Web Real Time Communications (WebRTC) family of protocols defines mechanism for direct interactive rich communication using audio, video, and data between two peers' web browsers. With in the WebRTC framework, the Session Description Protocol (SDP) is used for negotiating session capabilities between the peers. Such a negotiation happens based on the SDP offer/answer exchange mechanism This document provides an informational reference in describing the role of SDP and the offer/answer exchange mechanism for the most common WebRTC use cases. This document makes no changes to the SDP offer/answer exchange mechanism. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on 20 June 2021. Copyright Notice Copyright (c) 2020 IETF Trust and the persons identified as the document authors. All rights reserved. Nandakumar & Jennings Expires 20 June 2021 [Page 1] Internet-Draft SDP4WebRTC December 2020 This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/ license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. SDP and WebRTC . . . . . . . . . . . . . . . . . . . . . . . 3 4. Offer/Answer and the WebRTC . . . . . . . . . . . . . . . . . 6 5. WebRTC Session Description Examples . . . . . . . . . . . . . 6 5.1. Some Conventions . . . . . . . . . . . . . . . . . . . . 7 5.2. Basic Examples . . . . . . . . . . . . . . . . . . . . . 9 5.2.1. Audio Only Session . . . . . . . . . . . . . . . . . 9 5.2.2. Audio/Video Session . . . . . . . . . . . . . . . . . 13 5.2.2.1. IPv4 Audio/Video Session . . . . . . . . . . . . 14 5.2.2.2. Dual Stack Audio/Video Session . . . . . . . . . 19 5.2.3. Data-only Session . . . . . . . . . . . . . . . . . . 24 5.2.4. Audio Call On Hold . . . . . . . . . . . . . . . . . 26 5.2.5. Audio with DTMF Session . . . . . . . . . . . . . . . 30 5.2.6. One-way Audio/Video Session - Document Camera . . . . 34 5.2.7. Audio, Video Session with BUNDLE Support Unknown . . 39 5.2.8. Audio, Video, and Data Session . . . . . . . . . . . 45 5.2.9. Audioa andVideo Session with BUNDLE Unsupported . . . 50 5.2.10. Audio, Video BUNDLED, but Data Not BUNDLED . . . . . 56 5.2.11. Audio Only, Add Video to BUNDLE . . . . . . . . . . . 62 5.3. MultiResolution, RTX, FEC Examples . . . . . . . . . . . 70 5.3.1. Send-only Simulcast Session with 2 Cameras and 2 Encodings per Camera . . . . . . . . . . . . . . . . 70 5.3.2. Successful SVC Video Session . . . . . . . . . . . . 78 5.3.3. Successful Simulcast Video Session with Retransmission . . . . . . . . . . . . . . . . . . . 82 5.3.4. Successful One-way Simulcast Session with 2 resolutions and RTX - One resolution rejected . . . . . . . . . . 88 5.3.5. Simulcast Video Session with Forward Error Correction . . . . . . . . . . . . . . . . . . . . . 93 5.4. Others . . . . . . . . . . . . . . . . . . . . . . . . . 99 5.4.1. Audio Session - Voice Activity Detection . . . . . . 99 5.4.2. Audio Conference - Voice Activity Detection . . . . . 103Show full document text