W3C home > Mailing lists > Public > public-texttracks@w3.org > October 2011

Re: Kicking off to the Text Tracks Community Group

From: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
Date: Tue, 11 Oct 2011 14:01:41 +1100
Message-ID: <CAHp8n2=CPcaO_Z-gsBpdz1o-KACq62rPimPe-4hNjLeaeMVdZw@mail.gmail.com>
To: Ian Hickson <ian@hixie.ch>
Cc: public-texttracks@w3.org
On Tue, Oct 11, 2011 at 11:25 AM, Ian Hickson <ian@hixie.ch> wrote:
> On Tue, 11 Oct 2011, Silvia Pfeiffer wrote:
>>
>> 4. The WebVTT specification
>>
>> I'm sure you're all waiting to see the WebVTT specification in a place
>> where we can all start contributing. Right now, there are some licensing
>> issues to be sorted through, but I hope this can be resolved very soon.
>
> In the meantime, people should feel free to continue sending feedback as
> they have been.
>
> One thing that would be helpful for me as editor is determining exactly
> what aspects of the HTML standard people consider to be "WebVTT" so that
> we can extract just those. Is it just the syntax? Does it include the
> caption data model? Are the DOM APIs part of WebVTT? Is the rendering
> model part of WebVTT? How about the CSS extensions? Unfortunately the
> "webvtt.html" file people may have been looking at in the past is not a
> particularly good starting point as it is very coarse -- it's missing huge
> chunks of defining material (e.g. there's no conformance section).


These are great questions. I suggest we determine the answers by
applying this question: "is this an important aspect to know about
WebVTT when I am writing a WebVTT parsing application that is not a
Web browser (i.e. basically a media player)?"

The DOM and CSS side of things should be generic features of the
<track> element, so they need to be inside the HTML spec IMO.

The abstract rendering description should, however, definitely be in
the WebVTT spec, because we want the presentation the be the same
across all players.

So, I'd basically start with the WebVTT spec at
http://www.whatwg.org/specs/web-apps/current-work/webvtt.html and add
the text from http://www.whatwg.org/specs/web-apps/current-work/multipage/rendering.html#webvtt-cue-text-rendering-rules
in a media-element independent manner by just referring to the video
viewport.

Do you think that would be possible?

Cheers,
Silvia.
Received on Tuesday, 11 October 2011 03:02:28 UTC

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