- From: Laura Carlson <laura.lee.carlson@gmail.com>
- Date: Fri, 6 Nov 2009 09:32:50 -0600
- To: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
- Cc: public-html <public-html@w3.org>, HTML Accessibility Task Force <public-html-a11y@w3.org>
Hi Silvia, > If somebody wants to put this in a wiki, I'd be happy for it, but > since I'm not an editor, this is probably the best way to start the > list. I put the agenda in the Wiki. It is at: http://esw.w3.org/topic/HTML/MultimediaAccessibilty/TPACSession I also added you to the Wiki Editor's Group. http://esw.w3.org/topic/ESWEditorsGroup Best Regards, Laura On Thu, Nov 5, 2009 at 7:01 PM, Silvia Pfeiffer <silviapfeiffer1@gmail.com> wrote: > Hi all, > > This is a list of issues that I have gathered about video from > Sunday's workshop and would like to see discussed in the HTML WG > "Video" breakout group on Friday, 10am at TPAC. > > If somebody wants to put this in a wiki, I'd be happy for it, but > since I'm not an editor, this is probably the best way to start the > list. Please reply to the email with anything I have missed in your > eyes. > > 1. baseline codecs (http://www.w3.org/html/wg/tracker/issues/7, > http://www.w3.org/html/wg/tracker/actions/130) > * the consumer need for a common baseline codec is being voiced widely > * what are the options towards getting to an agreement on a common > baseline codec > > 2. Cue Ranges > * there seems to be a need for cue ranges, e.g. activate slide > changes, pause and display ad, captions for live video, others?? > * why is timeupdate not sufficient? > * why was previous specification not acceptable? > http://web.archive.org/web/20080724033624/http://www.whatwg.org/specs/web-apps/current-work/#cue-ranges > * revisit Apple proposal: > http://lists.w3.org/Archives/Public/public-html/2008May/0512.html > > 3. Media element accessibility (http://www.w3.org/html/wg/tracker/issues/9) > * brief summary of Sunday workshop: http://www.w3.org/2009/11/01-media-minutes > * feedback from PFWG: http://www.w3.org/2009/08/html5-spec-review > * current status: > http://lists.w3.org/Archives/Public/public-html/2007Jul/0136.html > > 3.1. Requirements > * existing documents: > http://esw.w3.org/topic/HTML/MultimediaAccessibilty > http://wiki.whatwg.org/wiki/Video_accessibility > https://wiki.mozilla.org/Accessibility/Video_a11y_Study08 > * existing bugs: > http://www.w3.org/Bugs/Public/show_bug.cgi?id=5758 (general accessibility) > http://www.w3.org/Bugs/Public/show_bug.cgi?id=8187 (audio descriptions) > * Sunday workshop stated need to write another requirements document - > possibly a summary of the above > > 3.2. Caption/Subtitle support > * there seems to be a need for declarative syntax for external caption > files - all inside the DOM or through javascript integrated? > * there seems to be a need to find out what content tracks are > available in a binary media file - a javascript query or a descriptive > block or a link to a file, SMIL-style? > * there seems to be a need to provide user interface controls for > captions (both, internal and external) and/or a standard API that > would allow a UA to query if media ".hasCaptions" > * there seems to be a need to provide a javascript API to get access > to the individual captions (both, internal and external) > * how would a user relate a caption file to a video inside the browser > on the fly? > > 3.3. What format to support for captions/subtitles? > * there seems to be a need for a baseline caption/subtitle codec > * srt vs DFXP vs. smilText? others? > http://www.srt-subtitles.com/ > http://www.w3.org/TR/ttaf1-dfxp/ > http://www.w3.org/TR/SMIL3/smil-text.html > > 3.4. Security issues with external caption files > * there seems to be a need to deal with XSS issues for external > caption/subtitle files > * is CORS the answer? http://www.w3.org/TR/access-control/ > > 3.5. Display activation issues with captions/subtitles > * there seems to be a need to specify display mechanisms for captions > * automated activation based on a browser preference? e.g. subtitles = on/off > * automated language selection based on browser setting? e.g. en for > ppl with browser set to en > * captions on by default / by selection > > 3.6. Audio description support > * there is a need to provide support for audio descriptions > * textual vs. audio versions? > * content negotiation for multi-track video? > * control of playback rate changes? > > 4. Hierarchical navigation through audio/video elements > * there seems to be a need to mark up media elements with a > hierarchical structure that can be used for browsing through the > element > * how should that be included? > > 5. Multi-track video > * there are many more alternative information tracks for videos, such as > - sign language, > - music/background sound track, > - alternate video angles, > - dubbed audio tracks, > - ticker text > - active regions (timed) > - annotations > - timed metadata > - timed transcript > - karaoke > - lyrics > - linguistic markup > * how to deal with such a collection of additional materials? > > Looking forward to an interesting and productive discussion tomorrow! > > Best Regards, > Silvia. -- Laura L. Carlson
Received on Friday, 6 November 2009 15:33:19 UTC