Re: Support for advanced caption features (inc rollup)

On Wed, Dec 5, 2012 at 5:44 AM, Ian Hickson <ian@hixie.ch> wrote:

> On Tue, 4 Dec 2012, Silvia Pfeiffer wrote:
> >
> > As part of an effort to substantially support all CEA-608 and CEA-708
> > features in VTT
>
> I continue to believe that this is a misguided effort that substantially
> misunderstands the point of WebVTT.
>


I expected this, however..

(1) We (YouTube) are required to support these features in the US (per
CVAA).
(2) As a delivery format, we have the choice of using:
       (a) A new private format that may or may not someday be a public
standard.
       (b) WebVTT, a public format that many browsers plan to support, at
least partially.
       (c) TTML/SMPTE-TT, a public format that most browsers don't plan to
support.
(3) Our preference is to make the necessary enhancements to (b) as that
seems
      to have the most promise for widespread implementation.

Several other companies have the same needs as YouTube does through (1).

>From a Google Chrome perspective, we want to support these features in
WebVTT:
* to allow publishers to replicate their TV captions with the same feature
set online,
* to enable authors to create captions in a style that users expect,
* to support a richer feature set for captions and timed text.

These are sufficient requirements for us to want to implement it in WebVTT.

Curious to hear from other browser vendors now.

Best Regards,
Silvia.