Edit ISSUE-142: No alternative text description for video key frame (poster)

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bug raised by everett zufelt http://www.w3.org/Bugs/Public/show_bug.cgi?id=10642 Issue: The HTML5 specification does not currently require, or make available a method to provide, an alternative text description for the poster attribute of the video element. Authors are able to specify a frame of video, or an image external to the video, to serve as a "poster". User agents can show this image while no video is available. When placing an image in a document using the img element, an alternative text replacement, using the alt attribute, is required, with the exception of specific use-cases. It does not appear that the usage of the poster attribute of the video element fits into any of the use-cases for omitting an alternative description with an img element, and therefore an alternate description should be required when authors explicitly set the poster attribute for a video element. Proposal: Move poster from being an attribute of the video element to being a descendant with at least a src and alt attribute. For example: <video ...> <poster src=" URI " alt="Alternative description of poster image." /> </video> References: http://dev.w3.org/html5/spec/video.html#attr-video-poster 4.8.6 The video element The poster attribute gives the address of an image file that the user agent can show while no video data is available. http://dev.w3.org/html5/spec/embedded-content-1.html#alt 4.8.1.1 Requirements for providing text to act as an alternative for images 4.8.1.1.1 General guidelines Except where otherwise specified, the alt attribute must be specified and its value must not be empty; the value must be an appropriate replacement for the image. The specific requirements for the alt attribute depend on what the image is intended to represent, as described in the following sections. HTML5-SPEC-SECTIONS [video]

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Related emails:

RE: FORMAL OBJECTION (RE: Working Group Decision on 142 poster-alt) (from Paul.Cotton@microsoft.com on 2012-10-08) (from Paul.Cotton@microsoft.com on 2012-10-08)highlight
Re: CP, ISSUE-30: Link longdesc to role of img [Was: hypothetical question on longdesc] (from silviapfeiffer1@gmail.com on 2012-03-21) (from silviapfeiffer1@gmail.com on 2012-03-21)highlight
Re: CP, ISSUE-30: Link longdesc to role of img [Was: hypothetical question on longdesc] (from xn--mlform-iua@xn--mlform-iua.no on 2012-03-21) (from xn--mlform-iua@xn--mlform-iua.no on 2012-03-21)highlight
Re: CP, ISSUE-30: Link longdesc to role of img [Was: hypothetical question on longdesc] (from silviapfeiffer1@gmail.com on 2012-03-21) (from silviapfeiffer1@gmail.com on 2012-03-21)highlight
Re: FW: Revised Timeline and New Bug Priority Policy (from rubys@intertwingly.net on 2012-02-28) (from rubys@intertwingly.net on 2012-02-28)highlight
{agenda} HTML WG telecon 2011-03-31: Issues, Publications, Surveys, Decisions, Task Force Reports (from rubys@intertwingly.net on 2011-03-30) (from rubys@intertwingly.net on 2011-03-30)highlight
Re: Working Group Decision on 142 poster-alt (from jonas@sicking.cc on 2011-03-29) (from jonas@sicking.cc on 2011-03-29)highlight
Re: FORMAL OBJECTION (RE: Working Group Decision on 142 poster-alt) (from rubys@intertwingly.net on 2011-03-29) (from rubys@intertwingly.net on 2011-03-29)highlight
Working Group Decision on 142 poster-alt (from rubys@intertwingly.net on 2011-03-29) (from rubys@intertwingly.net on 2011-03-29)highlight
{agenda} HTML WG telecon 2011-03-24: Issues, surveys, decisions (from mjs@apple.com on 2011-03-23) (from mjs@apple.com on 2011-03-23)highlight
RE: {minutes} HTML WG telecon 2011-03-17: Issues, surveys, decisions and task force reports (from adrianba@microsoft.com on 2011-03-17) (from adrianba@microsoft.com on 2011-03-17)highlight
{agenda} HTML WG telecon 2011-03-17: Issues, surveys, decisions and task force reports (from Paul.Cotton@microsoft.com on 2011-03-15) (from Paul.Cotton@microsoft.com on 2011-03-15)highlight
ISSUE-142: poster-alt - Straw Poll for Objections (from Paul.Cotton@microsoft.com on 2011-03-11) (from Paul.Cotton@microsoft.com on 2011-03-11)highlight
{minutes} HTML WG telecon 2011-03-10: Action items, issues, surveys and decisions (from Paul.Cotton@microsoft.com on 2011-03-11) (from Paul.Cotton@microsoft.com on 2011-03-11)highlight
{agenda} HTML WG telecon 2011-03-10: Action items, issues, surveys and decisions (from Paul.Cotton@microsoft.com on 2011-03-08) (from Paul.Cotton@microsoft.com on 2011-03-08)highlight
Re: ISSUE-9 video-accessibility: Call for Consensus to close in favor of specific issues, or Alternate/Counter-Proposals (from rubys@intertwingly.net on 2011-03-04) (from rubys@intertwingly.net on 2011-03-04)highlight
{minutes} HTML WG telecon 2011-03-03: Issues, Decisions, Task Force Reports, and Other Business (from Paul.Cotton@microsoft.com on 2011-03-04) (from Paul.Cotton@microsoft.com on 2011-03-04)highlight
RE: {minutes} HTML WG telecon 2011-03-03: Issues, Decisions, Task Force Reports, and Other Business (from adrianba@microsoft.com on 2011-03-03) (from adrianba@microsoft.com on 2011-03-03)highlight
{agenda} HTML WG telecon 2011-03-03: Issues, Decisions, Task Force Reports, and Other Business (from rubys@intertwingly.net on 2011-03-02) (from rubys@intertwingly.net on 2011-03-02)highlight
{minutes} HTML WG telecon 2011-02-24: Action items and Issues (from Paul.Cotton@microsoft.com on 2011-02-24) (from Paul.Cotton@microsoft.com on 2011-02-24)highlight
ISSUE-9 video-accessibility: Call for Consensus to close in favor of specific issues, or Alternate/Counter-Proposals (from mjs@apple.com on 2011-02-24) (from mjs@apple.com on 2011-02-24)highlight
{agenda} HTML WG telecon 2011-02-24: Action items and Issues (from Paul.Cotton@microsoft.com on 2011-02-23) (from Paul.Cotton@microsoft.com on 2011-02-23)highlight
RE: {minutes} HTML WG telecon 2011-02-03: Issues, survey, A11y TF mini-report, Bug 11984 (from adrianba@microsoft.com on 2011-02-10) (from adrianba@microsoft.com on 2011-02-10)highlight
Re: ISSUE-142 poster-alt - Chairs Solicit Alternate Proposals or Counter-Proposals (from silviapfeiffer1@gmail.com on 2011-02-04) (from silviapfeiffer1@gmail.com on 2011-02-04)highlight
{minutes} HTML WG telecon 2011-02-03: Issues, surveys (from Paul.Cotton@microsoft.com on 2011-02-03) (from Paul.Cotton@microsoft.com on 2011-02-03)highlight
RE: ISSUE-142 poster-alt - Chairs Solicit Alternate Proposals or Counter-Proposals (from jfoliot@stanford.edu on 2011-02-03) (from jfoliot@stanford.edu on 2011-02-03)highlight
ISSUE-142 poster-alt - Chairs Solicit Alternate Proposals or Counter-Proposals (from mjs@apple.com on 2011-02-03) (from mjs@apple.com on 2011-02-03)highlight
{agenda} HTML WG telecon 2011-02-03: Issues, surveys (from mjs@apple.com on 2011-02-02) (from mjs@apple.com on 2011-02-02)highlight
{minutes} HTML WG Telecon 2010-01-27: status of actions, new issues, closing items, new calls, charter status (from Paul.Cotton@microsoft.com on 2011-01-27) (from Paul.Cotton@microsoft.com on 2011-01-27)highlight
{agenda} HTML WG Telecon 2010-01-27: status of actions, new issues, closing items, new calls, charter status (from Paul.Cotton@microsoft.com on 2011-01-26) (from Paul.Cotton@microsoft.com on 2011-01-26)highlight
Re: ISSUE-142 (poster-alt): Chairs Solicit Proposals (from singer@apple.com on 2011-01-26) (from singer@apple.com on 2011-01-26)highlight
Re: ISSUE-142 (poster-alt): Chairs Solicit Proposals (from silviapfeiffer1@gmail.com on 2011-01-25) (from silviapfeiffer1@gmail.com on 2011-01-25)highlight
RE: ISSUE-142 (poster-alt): Chairs Solicit Proposals (from jfoliot@stanford.edu on 2011-01-24) (from jfoliot@stanford.edu on 2011-01-24)highlight
Re: ISSUE-142 (poster-alt): Chairs Solicit Proposals (from jackalmage@gmail.com on 2011-01-24) (from jackalmage@gmail.com on 2011-01-24)highlight
RE: ISSUE-142 (poster-alt): Chairs Solicit Proposals (from jfoliot@stanford.edu on 2011-01-24) (from jfoliot@stanford.edu on 2011-01-24)highlight
RE: ISSUE-142 (poster-alt): Chairs Solicit Proposals (from jfoliot@stanford.edu on 2011-01-22) (from jfoliot@stanford.edu on 2011-01-22)highlight
Re: ISSUE-142 (poster-alt): Chairs Solicit Proposals (from philipj@opera.com on 2011-01-22) (from philipj@opera.com on 2011-01-22)highlight
RE: {minutes} HTML WG Telecon 2010-01-20: status of actions, calls; task force reports (from adrianba@microsoft.com on 2011-01-20) (from adrianba@microsoft.com on 2011-01-20)highlight
{agenda} HTML WG Telecon 2010-01-20: status of actions, calls; task force reports (from rubys@intertwingly.net on 2011-01-18) (from rubys@intertwingly.net on 2011-01-18)highlight
{minutes} HTML WG Telecon 2010-12-16: status of actions, calls, new decisions, task force reports (from Paul.Cotton@microsoft.com on 2010-12-16) (from Paul.Cotton@microsoft.com on 2010-12-16)highlight
Re: ISSUE-142 (poster-alt): Chairs Solicit Proposals (from laura.lee.carlson@gmail.com on 2010-12-16) (from laura.lee.carlson@gmail.com on 2010-12-16)highlight
RE: ISSUE-142 (poster-alt): Chairs Solicit Proposals (from Paul.Cotton@microsoft.com on 2010-12-16) (from Paul.Cotton@microsoft.com on 2010-12-16)highlight
{agenda} HTML WG Telecon 2010-12-16: status of actions, calls, new decisions, task force reports (from Paul.Cotton@microsoft.com on 2010-12-16) (from Paul.Cotton@microsoft.com on 2010-12-16)highlight
{agenda} HTML WG Telecon 2010-12-16: status of actions, calls, new decisions, task force reports (from Paul.Cotton@microsoft.com on 2010-12-15) (from Paul.Cotton@microsoft.com on 2010-12-15)highlight
Re: ISSUE-142 (poster-alt): Chairs Solicit Proposals (from rubys@intertwingly.net on 2010-12-13) (from rubys@intertwingly.net on 2010-12-13)highlight
RE: ISSUE-142 (poster-alt): Chairs Solicit Proposals (from jfoliot@stanford.edu on 2010-12-13) (from jfoliot@stanford.edu on 2010-12-13)highlight
ISSUE-142 (poster-alt): Chairs Solicit Proposals (from Paul.Cotton@microsoft.com on 2010-12-13) (from Paul.Cotton@microsoft.com on 2010-12-13)highlight
{minutes} HTML WG Telecon 2010-11-18: status of actions, calls, issues, meeting schedule, timeline to LC status (from Paul.Cotton@microsoft.com on 2010-11-21) (from Paul.Cotton@microsoft.com on 2010-11-21)highlight
{agenda} HTML WG Telecon 2010-11-18: status of actions, calls, issues, meeting schedule, timeline to LC status (from Paul.Cotton@microsoft.com on 2010-11-17) (from Paul.Cotton@microsoft.com on 2010-11-17)highlight
ISSUE-142 (poster-alt): No alternative text description for video key frame (poster) [HTML 5 spec] (from sysbot+tracker@w3.org on 2010-11-12) (from sysbot+tracker@w3.org on 2010-11-12)highlight

Related notes:

Working Group Decision: http://lists.w3.org/Archives/Public/public-html/2011Mar/0690.html

Sam Ruby, 29 Mar 2011, 15:02:41

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POSTPONED: http://lists.w3.org/Archives/Public/public-html/2012Feb/0486.html

Sam Ruby, 28 Feb 2012, 22:45:53

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Maciej Stachowiak <mjs@apple.com>, Sam Ruby <rubys@intertwingly.net>, Chairs, Michael[tm] Smith <mike@w3.org>, Staff Contact
Tracker: documentation, (configuration for this group), originally developed by Dean Jackson, is developed and maintained by the Systems Team <w3t-sys@w3.org>.
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