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RE: [Fwd: Timed tracks]

From: Philippe Le Hegaret <plh@w3.org>
Date: Thu, 22 Apr 2010 13:02:47 -0400
To: Sean Hayes <Sean.Hayes@microsoft.com>
Cc: "public-tt@w3.org" <public-tt@w3.org>
Message-Id: <1271955767.9926.64.camel@chacal>
On Thu, 2010-04-22 at 16:18 +0000, Sean Hayes wrote:
> The CSS of the host page in my opinion should not affect the caption text. The captions are authored in order to go with the video, and generally are owned by the video owner, thus the style of the captions should be delivered with those captions. In some use cases, for example selecting larger fonts or specific colour schemes for low vision users, there is some argument for allowing the UA to allow the user to control some styles in the captions; but I'm not of the opinion that mixing the page style with the caption style is an appropriate way to go about that.

You're correct. There are certainly some issues with having the captions
directly into the HTML.

> I'm not expecting HTML renderers to render the content, since HTML has no concept of timing. I'm expecting a TTML renderer to render the content.Now, converting TTML to HTML and creating a timing model inside HTML is one implementation technique for creating a TTML renderer, and as you say relatively straightforward, but not necessarily the optimum one.

except that, since I can't imagine Web browsers willing to implement a
TTML renderer, converting it into HTML will be the optimum one for them.
And once you made that jump, you realized that adding timing information
to HTML might even be a shorter path. I give the full power of HTML and
CSS3 without having to rev TTML.

Received on Thursday, 22 April 2010 17:02:54 UTC

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