Manually advance the video one 'frame' (or as close as possible to that). Using a timed interval, calculated according to the movie's framerate, I want on each iteration toĪ. the mix of image map and subtree are the closest we can get, considering the limitations imposed by the canvas API.I want to load a video into a video element, but not have it played in the "normal" way. i envisage that for most purposes defining an image map will suffice, but for those cases it does not, adding elements to the subtree will provide that extra richness. Allowing image maps to be defined for canvas also does this, but it does not provide the same scope of interaction. allowing elements in the canvas subtree to be focusable provides a method for developers to add interaction using html elements which provide the focus, name, role,state and value information to accessibility APIs that would otherwise have to be totally scripted ie not possible, so it will be a method for developers to add interaction for all users, not just for accessibility. The canvas API provides no means to add focusable content or add semantics, it is only a drawing API. It is basically random, as people don’t specify it.Ĭould the structure aspect needed be used for other things as well? Things that people attend to more, e.g. Take any Flash site where accessibility wasn’t a prime concern and check the tab-order of elements. “Perhaps because invisible aspects like this (virtually) never get added. īuy "Calling For The Moon", my debut album of songs I wrote while living in Thailand, India, Turkey. Posted inĪccessibility web standards, HTML5, Opera. Why not stop by a chat, especially if you’re a gorgeous Web Standards babe, or have a black coffee for me? Alternatively, I’m first speaker at an HTML5 extravaganza on Sunday from 2 to 6 pm. But it’s Steve, and his shit is solid.Īnyway, gotta go and shower my pits before booth-bunnying the Opera South By Southwest booth. The Mighty Steve Faulkner also has a proposal Provide accessibility implementation for focus rectangle and caret, which I haven’t read yet. (Disclosure: the proposal was made by Chaals, Head of Standards at Opera, but that’s not why I prefer it.) The proposal that I like is to extend canvas is “Improve image maps, don’t use which I favour because it uses familiar markup and reuses ideas from (and browser implementations of) HTML4. I’m uncomfortable with this proposal for reasons that I’m not quite able to articulate at the moment (but its author is at South By Southwest so I hope to be able to catch up with him for a chat). There are two main proposals, one is for a new attribute called adom (for “accessibility DOM”) that constructs a “shadow DOM” for assistive technologies can hook into – and which the author must ensure is in sync with the visual rendering. The second vote that’s taking place is about extensions to canvas. (My vote was a personal opinion and not an official Opera vote, by the way.) srt, but has the potential for extensibility when browser implementations become more sophisticated. I voted for DFXP because, at its most basic it doesn’t need to be more complex than plain. (.srt seems to me to be as limited alt text on an image it can’t contain markup or styling information). srt format (a plain text file with time markers and text) or the W3C standard DXFP which, although minging, allows markup. The first was on what type of captioning format should be supported, and asked us to choose between the. I’m a lurking member of two W3C subgroups that work on the accessibility of video and canvas. I was chatting to Tantek Çelik last night, and he said he’s looking to add some microdata support in microformats. You can have a play using JavaScript microdata implementation (work in progress the lad has other things on his mind). No browser does anything with data it finds in pages, but the voodoo magicians that do SEO will presumably find the chance of extra googlejuice compelling. The first is the news that Google will start indexing content marked up using microdata.
VIDEOCANVAS UPDATE
HTML5 video, canvas accessibility, microdataĪs I sit here in Austin, Texas munching a breakfast of bafflingly-termed foodstuffs like “eggs medium over-easy”, “white omlette” and incorrectly-pronounced tomatoes, I thought I’d update you on a few HTML5 tidbits. Travellin' Bruce - photos of my travels.What’s Bruce wearing Today? - legendary fashion blog.
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