WebRTC Video Processing and Codec Requirements
draft-ietf-rtcweb-video-05

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Document Type Active Internet-Draft (rtcweb WG)
Last updated 2015-06-11 (latest revision 2015-03-19)
Replaces draft-cbran-rtcweb-codec
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Stream WG state Submitted to IESG for Publication (wg milestone: Dec 2014 - Video Processing and... )
Document shepherd Sean Turner
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Responsible AD Alissa Cooper
Send notices to draft-ietf-rtcweb-video.ad@ietf.org, rtcweb-chairs@ietf.org, draft-ietf-rtcweb-video@ietf.org, turners@ieca.com, draft-ietf-rtcweb-video.shepherd@ietf.org
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Network Working Group                                         A.B. Roach
Internet-Draft                                                   Mozilla
Intended status: Standards Track                          March 17, 2015
Expires: September 18, 2015

             WebRTC Video Processing and Codec Requirements
                       draft-ietf-rtcweb-video-05

Abstract

   This specification provides the requirements and considerations for
   WebRTC applications to send and receive video across a network.  It
   specifies the video processing that is required, as well as video
   codecs and their parameters.

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 http://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 September 18, 2015.

Copyright Notice

   Copyright (c) 2015 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://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.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Pre and Post Processing . . . . . . . . . . . . . . . . . . .   2
     3.1.  Camera Source Video . . . . . . . . . . . . . . . . . . .   3
     3.2.  Screen Source Video . . . . . . . . . . . . . . . . . . .   3
   4.  Stream Orientation  . . . . . . . . . . . . . . . . . . . . .   3
   5.  Mandatory to Implement Video Codec  . . . . . . . . . . . . .   4
   6.  Codec-Specific Considerations . . . . . . . . . . . . . . . .   5
     6.1.  VP8 . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
     6.2.  H.264 . . . . . . . . . . . . . . . . . . . . . . . . . .   6
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   7
     10.2.  Informative References . . . . . . . . . . . . . . . . .   8
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   One of the major functions of WebRTC endpoints is the ability to send
   and receive interactive video.  The video might come from a camera, a
   screen recording, a stored file, or some other source.  This
   specification defines how the video is used and discusses special
   considerations for processing the video.  It also covers the video-
   related algorithms WebRTC devices need to support.

   Note that this document only discusses those issues dealing with
   video codec handling.  Issues that are related to transport of media
   streams across the network are specified in
   [I-D.ietf-rtcweb-rtp-usage].

2.  Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

3.  Pre and Post Processing

   This section provides guidance on pre- or post-processing of video
   streams.

   Unless specified otherwise by the SDP or codec, the color space
   SHOULD be sRGB [SRGB].  For clarity, this the color space indicated
   by codepoint 1 from "ColourPrimaries" as defined in [IEC23001-8].

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   Unless specified otherwise by the SDP or codec, the video scan
   pattern for video codecs is Y'CbCr 4:2:0.
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