ISSUE-9

video-accessibility

how accessibility works for <video> is unclear

State:
RAISED
Product:
HTML 5 spec
Raised by:
Chris Wilson
Opened on:
2007-11-08
Description:
Issue is detailed at: Multimedia Accessibility <Audio> <Video>
http://esw.w3.org/topic/HTML/MultimediaAccessibilty

Related Bugs:
5758: Insufficient accessibility fallback for <audio> or <video>:
http://www.w3.org/Bugs/Public/show_bug.cgi?id=5758
8187: Section 4.8.7 on video makes no reference to audio description
http://www.w3.org/Bugs/Public/show_bug.cgi?id=8187	

Minutes: Accessibility of Media Elements in HTML 5 Gathering, November 1, 2009
http://www.w3.org/2009/11/01-media-minutes.html

HTML5-SPEC-SECTIONS [video]
Related Actions Items:
Related emails:
  1. Re: Topics for 'Video' Breakout Group (from silviapfeiffer1@gmail.com on 2009-11-06)
  2. Re: Topics for 'Video' Breakout Group (from laura.lee.carlson@gmail.com on 2009-11-06)
  3. Re: Topics for 'Video' Breakout Group (from silviapfeiffer1@gmail.com on 2009-11-05)
  4. Topics for 'Video' Breakout Group (from silviapfeiffer1@gmail.com on 2009-11-05)
  5. [Bug 5758] insufficient accessibility fallback for <audio> or <video> (from bugzilla@wiggum.w3.org on 2009-11-03)
  6. minutes for 2009-09-03 telcon (from mike@w3.org on 2009-09-05)
  7. Agenda for HTML WG telcon 2009-08-20 - Accessibility TF, HTML5 Test Suite, etc (from mjs@apple.com on 2009-09-01)
  8. Re: ISSUE-9: video-synchronization - suggest closing on 2009-08-27 - param (from mjs@apple.com on 2009-08-28)
  9. Re: ISSUE-9: video-synchronization - suggest closing on 2009-08-27 - param (from joedwil@earthlink.net on 2009-08-28)
  10. {minutes} HTML WG telcon 2009-08-27 (from annevk@opera.com on 2009-08-27)
  11. {agenda} HTML WG telcon 2009-08-27 *PLEASE-READ* (from rubys@intertwingly.net on 2009-08-26)
  12. Re: ISSUE-9: video-synchronization - suggest closing on 2009-08-27 (from joedwil@earthlink.net on 2009-08-25)
  13. Re: ISSUE-9: video-synchronization - suggest closing on 2009-08-27 (from mjs@apple.com on 2009-08-24)
  14. Re: ISSUE-9: video-synchronization - suggest closing on 2009-08-27 (from joedwil@earthlink.net on 2009-08-24)
  15. Re: ISSUE-9: video-synchronization - suggest closing on 2009-08-27 (from mjs@apple.com on 2009-08-24)
  16. Re: Spec with issue markers [was: Re: HTML5-warnings - request to publish as next heartbeat WD] (from rubys@intertwingly.net on 2009-08-24)
  17. Re: ISSUE-9: video-synchronization - suggest closing on 2009-08-27 (from connolly@w3.org on 2009-08-24)
  18. ISSUE-9: video-synchronization - suggest closing on 2009-08-27 (from mjs@apple.com on 2009-08-23)
  19. State of HTML WG Unresolved Issues (from mjs@apple.com on 2009-08-20)
  20. Issues closed (from mjs@apple.com on 2009-08-20)
  21. {agenda} HTML WG telcon 2009-08-20 (from rubys@intertwingly.net on 2009-08-19)
  22. Old issues - will be closed on 2009-08-20 if there are no objections (from mjs@apple.com on 2009-08-13)
  23. ISSUE-9: video-synchronization - suggest closing on 2009-08-20 (from mjs@apple.com on 2009-08-13)
  24. Re: {agenda} HTML WG telcon 2009-08-13 (from cooper@w3.org on 2009-08-12)
  25. Re: {agenda} HTML WG telcon 2009-08-13 (from singer@apple.com on 2009-08-12)
  26. {agenda} HTML WG telcon 2009-08-13 (from rubys@intertwingly.net on 2009-08-12)
  27. Regarding closing issues (from mjs@apple.com on 2009-08-11)
  28. ISSUE-9: suggest closing (from mjs@apple.com on 2009-08-10)
  29. {minutes} HTML WG issue-tracking telcon 2008-06-19 (from mike@w3.org on 2008-06-25)
  30. ISSUE-9 (video-synchronization): how synchronization works for <video> is unclear [HTML 5 spec] (from sysbot+tracker@w3.org on 2007-11-08)

Related notes:

2007-11-09 15:30:13: Dave Singer notes: The specification as of the tech. plenary deliberately avoids this issue. It treats the HTML page itself as an un-timed container, which embeds independently-timed media elements. If the embedding of separate, synchronized, media elements is needed, then the (implied, but mostly unstated) assumption is that an intermediate time-container format (such as SMIL or SVG) would be embedded in HTML, and then that would embed the media. This covers the simple use cases (one media element, or unsynchronized multiple elements), and the fairly-simple (media elements that can be co-located in a single time-container). It leaves out the more complex ones: visually or contextually separated media elements on the same page, or the synchronization of other time-based behavior with media (animations). Whether this limitation is acceptable in the interests of simplicity, and if it is, whether a later update could deal with this issue if indeed it is not dealt with in the first iteration, need to be considered. [David Singer]

2009-10-06 16:23:56: HTML5 Comments from the User Agent Accessibility Guidelines Working Group
http://lists.w3.org/Archives/Public/public-html-comments/2009Oct/0002.html [Laura Carlson]

2009-10-06 16:26:24: Pre-TPAC HTML5 Video Accessibility Workshop November 1
http://www.w3.org/2009/09/acc-media-html-gathering.html
Details:
http://blog.gingertech.net/2009/09/22/w3c-workshopbarcamp-on-html5-video-accessibility/
[Laura Carlson]

2009-10-24 08:17:56: Related Bug 5758
http://www.w3.org/Bugs/Public/show_bug.cgi?id=5758 [Laura Carlson]

2009-10-24 08:18:21: September 11, 2008 teleconference discussion
http://krijnhoetmer.nl/irc-logs/html-wg/20080911#l-216 [Laura Carlson]

2009-10-24 08:18:45: Discussion on public-html
http://esw.w3.org/topic/HTML/MultimediaAccessibilty#head-4478e9bc06ba2f49a7c35734c8ca2ed12679a003 [Laura Carlson]

2009-10-24 08:21:25: Request for PFWG WAI review of multimedia accessibility requirements <audio> <video>, September 2008
http://lists.w3.org/Archives/Public/public-html/2008Sep/0421.html [Laura Carlson]

2009-10-24 08:22:12: Followup Re: Request for PFWG WAI review of multimedia accessibility requirements <audio> <video>
http://lists.w3.org/Archives/Public/www-archive/2009May/0008.html [Laura Carlson]

2009-11-04 00:19:15: Minutes: Accessibility of Media Elements in HTML 5 Gathering, November 1, 2009
http://www.w3.org/2009/11/01-media-minutes

From: Accessibility of Media Elements in HTML 5 Gathering
http://www.w3.org/2009/09/acc-media-html-gathering.html [Laura Carlson]

Display change log.

Paul Cotton <Paul.Cotton@microsoft.com>, Maciej Stachowiak <mjs@apple.com>, Sam Ruby <rubys@intertwingly.net>, Chairs, Dan Connolly <connolly@w3.org>, Michael(tm) Smith <mike@w3.org>, Staff Contacts
Tracker, originally developed by Dean Jackson, is developed and maintained by the Systems Team <w3t-sys@w3.org>.
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