- From: Jim Allan <jimallan@tsbvi.edu>
- Date: Thu, 4 Nov 2010 12:03:24 -0500
- To: WAI-ua <w3c-wai-ua@w3.org>
ACTION-460 jallan to discuss EVD2 & 3 - add to IER to 4.9 SC or create new SC, also review CC2,3,4 Proposal: add ED information to 4.9.8 track manipulation - Intent/Example/Resources add to IER, use case - author created the ED as a separate track, then user can select the ED track. 4.9.8 Track Enable/Disable of Time-Based Media: During time-based media playback, the user can determine which tracks are available and select or deselect tracks. These selections may override global default settings for captions, audio descriptions, etc. Intent: Authors are able to create time-based media with video (perhaps multiple video tracks), multiple audio tracks ( e.g. different languages, video description, extended video description), and multiple caption tracks (e.g. different languages, text of video description, text of extended video description). Users should be able to identify and select from the available tracks. The user may also change their selections. The user agent must provide a mechanism to list the available author supplied tracks and allow the user to select which to play. Examples: Jose, a student with a hearing disability, sometimes misses parts of the dialog in movies because of the sound level or background noise. He can select the caption track to be displayed so that he can read the dialog. Lin, who is blind, cannot see all of the action in suspense movies. She can select the video description track in addition to the audio track, to hear the action and scenes described during the movie and not miss out on the suspense. Mary has a learning and attention problem. She needs more elaborate descriptions of what is happening in a movie of a science demonstration. Mary selects the author-supplied extended description audio track for which the video pauses for extended descriptions of specific concepts. Mary also selects the author-supplied extended description caption track to go along with the extended description audio track so that she can read along with the audio and focus on reading and listening to the content. Resources: HTML 5 Video Element http://www.w3.org/TR/html5/video.html#video -- Jim Allan, Accessibility Coordinator & Webmaster Texas School for the Blind and Visually Impaired 1100 W. 45th St., Austin, Texas 78756 voice 512.206.9315 fax: 512.206.9264 http://www.tsbvi.edu/ "We shape our tools and thereafter our tools shape us." McLuhan, 1964
Received on Thursday, 4 November 2010 17:04:00 UTC