Re: WebVTT updates

Gary,

We are interested in understanding where WebVTT is in terms of global
subtitle support, so that we can determine our WebVTT roadmap.  Is there a
WebVTT implementation that supports the essential Japanese Subtitle
Features (as listed below) that we can work with?

Essential Features
● Vertical text
● Ruby annotations
● Side marks (‘bou-ten’)
● Horizontal-in-vertical (tate chu yoko)
● Side lines (‘bou-sen’)
● Oblique (Slanted) (‘nana-me’)


Thanks,
David

On Wed, Mar 6, 2019 at 8:32 AM Gary Katsevman <me@gkatsev.com> wrote:

> Hello everyone,
>
> I wanted to send out an update regarding WebVTT and to start the ball
> rolling on the next steps.
>
> This week I was at FOMS and was speaking with Crunchyroll and they are
> investing heavily in WebVTT, which I thought was very cool and wanted to
> share.
>
> I've made a pull request[1] against the WebVTT repo to mark the following
> as at risk:
> - collision avoidance with snap-to-lines false,
> - ::cue-region pseudo-element
> - :past and :future pseudo-classes
>
> STYLE blocks are not marked as at risk because I have a prototype[2] that
> will be fully implemented by the time the 28-day wait period of updating
> the CR has finished.
>
> I have also made a branch[3] with test removals to match the at-risk
> features. With the test removals of the at-risk features, there is only one
> test that fails (see the rendering 2/27/19 sheet on the WebVTT web platform
> tests spreadsheet[4]). This one test is because browsers have not yet
> implemented `text-wrap: balance`[5] and the WebVTT defines that cues should
> have that property set.
>
> I think we should proceed with marking the above features as at-risk, then
> working on a new draft that removes the text to get it moved to PR.
> Afterwards, we can create a new Draft or even CR with the at-risk features
> put back in and work towards a new version of WebVTT.
>
> Thanks,
> Gary.
>
> [1]: https://github.com/w3c/webvtt/pull/449
> [2]: https://github.com/videojs/vtt.js/pull/35
> [3]:
> https://github.com/web-platform-tests/wpt/compare/master...gkatsev:webvtt-at-risk?expand=1
> [4]:
> https://docs.google.com/spreadsheets/d/e/2PACX-1vSHzJtwi_2ijdV7hRUH0Fe8qZeSwMaCLErK7w7U_IFzhzNmW9YwPRWrER1eHR9-4Eo0kqyXJ4G35b1b/pubhtml
> [5]: https://www.w3.org/TR/css-text-4/#valdef-text-wrap-balance
>