- From: Jim Allan <jimallan@tsbvi.edu>
- Date: Mon, 14 Feb 2011 15:41:55 -0600
- To: WAI-ua <w3c-wai-ua@w3.org>
Proposal: AutoPlay 2.9.2 Time-Based Media Load-Only: The user can load time-based media content such that the first frame is displayed (if video), but the content is not played until explicit user request. (Level A) Intent: As an opt-in user setting, autoplay for media is off/paused, until the user activates 'play'. Prevent media from playing without explicit request from the user. For example, Uart, a screen reader user, opens a page with an audio element that starts playing immediately. The user cannot hear the screen reader because of the noise from the audio element, and must search through the page to find the 'noisy' element to turn it off (or pause). Once the screen reader is the sole source of audio the user can read the page and determine if the audio is important and choose to play it. Examples: 1. Using the same techniques as are used for pop-up blockers, the user agent checks to see if the play() request was from user interaction or a background script. If isn't from direct user interaction, the user agent could ask the user to explicitly allow the media to play, perhaps remembering the choice for the site. 2. Playback of a <video> or <audio> element can only be triggered in response to a user gesture on a touch screen device with no keyboard (like pop-up blockers). The user agent provides a visual and auditory indicator that the video is in paused state and needs user interaction to start. 3. The user agent provides a global control that calls "paused for user interaction" for all media when a page loads. Resources: 1. HTML5 4.8.10.8 Playing the media resource (http://dev.w3.org/html5/spec/Overview.html#playing-the-media-resource) -- 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 Monday, 14 February 2011 21:42:29 UTC