Re: Evidence of 'Wide Review' needed for VTT

Thank you!! Inline…

> On Jan 19, 2015, at 15:39 , Jeroen Wijering <jeroen@jwplayer.com> wrote:
> 
> With JW Player, we implemented basic parsing of cues and rendering of
> cues according to the draft spec. Especially in the area of rendering,
> the spec is well defined and very helpful to implementors. With TTML
> and SRT, we had to be much more creative in doing the rendering. Let
> me know what exactly you'd like to see in terms of feedback on the
> spec; our player engineers can put that together.
> 
> We have not yet implemented regions. It's a bit hard to comment on the
> spec without doing the work; you always find the small details when
> implementing. It reads very defined and focused to the use case though
> (608 compatibility). If you require comments from people that have
> implemented the spec, we could look into prioritizing this work for JW
> Player.

These two paragraphs are great feedback by themselves!

I read it as “we have reviewed and implemented most of the spec. without questions; for regions, we have reviewed and it seems well documented, but have not yet implemented”.

Note that if I remember, I’ll get an MPEG liaison saying that we implemented VTT-in-MP4 using the parsing process (to the level needed) directly lifted from the spec., without issues or need for comment.

> 
> The one item I'm missing from the spec is inline CSS, but that's
> pushed to V2 right?


Sort-of.  I think that we can and should develop consensus on how to handle it, and then a question of when it’s integrated into the bleeding-edge whatwg spec. is easy. whether we roll a 1.1 through the Rec process is a separate question.

> (https://www.w3.org/Bugs/Public/show_bug.cgi?id=15023) On platforms
> like Flash or native Android, we'd like to have all cue styling inline
> since there's no CSS. Publisher also need it when converting from
> legacy formats (608, TTML) into VTT. In these formats, the styling
> also "lives" inline.

when you say inline CSS, you mean both of
a) style-sheets in the header?
b) styling in the cues themselves, using CSS snippets?

Have you looked at the old threads on this question?  I think we got close to a number of possible designs, but held off until it was really needed and we had real implementers on hand.

> 
> - Jeroen
> 
> 
> 
> On Wed, Jan 14, 2015 at 4:40 PM, Steve Heffernan <steve@zencoder.com> wrote:
>> I've CC'd Gary Katsevman who's done the most work with the vtt spec for
>> Video.js. Gary, how do you feel about the state of the VTT spec? Did you run
>> into any issues that could be submitted as a bug?
>> 
>> Also CC'd Rick Eyre (mozilla/vtt.js) though he's probably already on the
>> list.
>> 
>> -Steve

David Singer
Manager, Software Standards, Apple Inc.

Received on Monday, 19 January 2015 21:54:13 UTC