Re: Timed tracks

On Fri, Apr 23, 2010 at 5:53 AM, Sean Hayes <>wrote:

> I'm not sure what level of integration is being considered, or why CSS
> would necessarily be perceived as a benefit, since in my opinion there will
> need to be a strong barrier between the HTML and the timed text
> environments, for both security reasons and in order that the video/caption
> author's intention is not undermined by the HTML page author.

The latter goal is not achievable with separate caption tracks. We will
almost certainly provide a way for the HTML page author to disable caption
tracks (Sylvia has already proposed such an API). Then the page author can
superimpose whatever caption content he/she wants. Burning captions into the
video stream is the most effective way to achieve that goal, and even that
isn't foolproof.

"He was pierced for our transgressions, he was crushed for our iniquities;
the punishment that brought us peace was upon him, and by his wounds we are
healed. We all, like sheep, have gone astray, each of us has turned to his
own way; and the LORD has laid on him the iniquity of us all." [Isaiah

Received on Friday, 23 April 2010 03:11:16 UTC