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 . . . . . 103
Show full document text