- From: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
- Date: Fri, 12 Aug 2011 07:31:03 +1000
- To: Cyril Concolato <cyril.concolato@telecom-paristech.fr>
- Cc: public-web-and-tv@w3.org
On Fri, Aug 12, 2011 at 6:34 AM, Cyril Concolato <cyril.concolato@telecom-paristech.fr> wrote: > Le 11/08/2011 12:34, Silvia Pfeiffer a écrit : >> >> On Thu, Aug 11, 2011 at 7:35 PM, Cyril Concolato >> <cyril.concolato@telecom-paristech.fr> wrote: >>> >>> Hi Sylvia, >>> >>>> Can you fill the TextTrack object and the cues from a SVG? As long as >>>> you can make a mapping, it's possible. If the format doesn't fit with >>>> the elements, then it's an orthogonal concept that won't fit the bill. >>> >>> Reading http://www.w3.org/TR/html5/video.html#text-track it says: >>> "A text track consists of:" >>> * "The kind of text track": would apply to SVG tracks >>> * "A label": would apply to SVG tracks >>> * "A language": would apply to SVG tracks >>> * "A readiness state": would apply as well >>> * "A mode": same >>> * "A list of zero or more cues" >>> >>> A Cue is defined as: >>> * "An identifier": applicable to SVG tracks >>> >>> * "A start time"/"An end time": >>> As such SVG does not define frame-based content as Flash would do or >>> other >>> subtitling formats, but you can define frame-based content such as: >>> http://perso.telecom-paristech.fr/~concolat/SVG/flash8.svg >> >> This is one of the major requirements. > > Do you have a document describing those requirements ? The HTML specification incorporates these requirements. >> Trust me - SVG won't fit the >> bill as a time-aligned data format. > > General purpose SVG no but SVG with some constraints yes. It's not the > perfect time-aligned format but it works. I've demonstrated that it's > possible to fragment some SVG into frames, store them in MP4, stream them > ... [1] Right. That's why it's not generally useful for the <track> purpose. You could define a sub-language (like a profile) of SVG that might fit, but then it's not SVG any more. >> And browsers won't implement it. > > That me be true for now but you never know. They might be interested in it. > >> But you can always try a JavaScript implementation to prove me wrong. > > "implementation of what" ? A demonstration of how SVG in <track> is useful. You can always extend the HTML functionality through JavaScript to demonstrate such things and make a point towards including it into HTML. That's in fact the best approach to getting new features happening. Just as you've shown SVG in MP4, you should demonstrate SVG in <track> if that is what you want to achieve. Cheers, Silvia.
Received on Thursday, 11 August 2011 21:32:00 UTC