- From: Jim Allan <jimallan@tsbvi.edu>
- Date: Thu, 18 Dec 2014 10:49:33 -0600
- To: WAI-ua <w3c-wai-ua@w3.org>
- Message-ID: <CA+=z1W=PVN23m6Huyts6Tk73U7Zcoa9UXkSPukndKjVHi60sMg@mail.gmail.com>
reviewed http://www.w3.org/TR/media-accessibility-reqs/ for correlation to 1.1.6 - they have it covered. 1.1.6 below for reference, and appropriate checklist items listed below for reference. Note the Media Accessibility requirements have outdated references to UAAG20, I am compiling a list and will forward it to them. Jim 1.1.6 Allow Resize and Reposition of Time-based Media Alternatives: The user can configure recognized <http://w3c.github.io/UAAG/UAAG20/#def-recognize> alternative content for time-based media (e.g. captions, sign language video) as follows: (Level AAA) - *Resize:* The user can resize alternative content for time-based media to at least 50% of the size of the top-level viewports <http://w3c.github.io/UAAG/UAAG20/#def-viewport-toplevel>. - *Reposition:* The user can reposition alternative content for time-based media to two or more of the following: above, below, to the right, to the left, and overlapping the primary time-based media. - *Note 1:* Depending on the screen area available, the display of the primary time-based media may need to be reduced in size or hidden to meet this requirement. - *Note 2:* Implementation may involve displaying alternative content for time-based media in a separate viewport, but this is not required. media guideline correlates *[IC-2]* Support a rich set of native controls for media operation, including but not limited to play, pause, stop, jump to beginning, jump to end, scale player size (up to full screen), adjust volume, mute, captions on/off, descriptions on/off, selection of audio language, selection of caption language, selection of audio description language, location of captions, size of captions, video contrast/brightness, playback rate, content navigation on same level (next/prev) and between levels (up/down) etc. This is also a particularly important requirement on mobile devices or devices without a keyboard. *[VP-1]* It must be possible to deal with three different cases for the relation between the viewport size, the position of media and of alternative content: 1. the alternative content's extent is specified in relation to the media viewport (e.g., picture-in-picture video, lower-third captions) 2. the alternative content has its own independent extent, but is positioned in relation to the media viewport (e.g., captions above the audio, sign-language video above the audio, navigation points below the controls) 3. the alternative content has its own independent extent and doesn't need to be rendered in any relation to the media viewport (e.g., text transcripts) *[VP-3]* Provide the user with the ability to adjust the size of the time-based media up to the full height or width of the containing viewport, with the ability to preserve aspect ratio and to adjust the size of the playback viewport to avoid cropping, within the scaling limitations imposed by the media itself. (UAAG 2.0 1.8.9) *[CC-5]* Support positioning in all parts of the screen - either inside the media viewport but also possibly in a determined space next to the media viewport. This is particularly important when multiple captions are on screen at the same time and relate to different speakers, or when in-picture text is avoided. *[CC-15]* Support positioning such that the lowest line of captions appears at least 1/12 of the total screen height above the bottom of the screen, when rendered as text in a right-to-left or left-to-right language. -- [image: http://www.tsbvi.edu] <http://www.tsbvi.edu>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, 18 December 2014 16:50:19 UTC