TTWG Meeting 2019-05-09

[nigelmegitt]

Agenda

1. This meeting
2. WebVTT Implementation Report
3. TTML Live contribution
4. TTML2 and TTML3 Pull Requests
5. AOB – please notify of any other AOB now!

Time

15:00 - 16:00 (1 hour) UTC

Please be ready for a prompt start at 15:03am UTC time.

Our teleconference is scheduled with reference to UTC Time, the correct time of this teleconference in your locale may change.

Check https://www.timeanddate.com/worldclock/fixedtime.html?iso=20190509T15&p1=1440

Joining details:

see https://lists.w3.org/Archives/Member/member-tt/2016Oct/0009.html
(members-only link – if you can't see this and wish to join please contact me)

Future meetings and recent activity:

See the TTWG project board for upcoming meetings.

See individual agenda items for recent activity on specific products.

See the TTWG home page for links to repositories and recent activity.

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Agenda+ This meeting

Assign Roles

Chairs: Nigel Megitt

Scribe: Cyril

Regrets: Philippe, Thierry, Gary, Glenn

Prioritise discussion for this meeting and look ahead

Check-point for order of topics and any other business.

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WebVTT Implementation report

Implementation report: https://www.w3.org/wiki/TimedText/WebVTT_Implementation_Report

Web Platform Tests

Specification edits

PR to remove at-risk features: w3c/webvtt#453

Progress towards CR Exit Criteria?

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TTML Live contribution

EBU has contributed their specifications for EBU-TT Live, which extend EBU-TT to add sequence processing semantics (and other features needed for the use case), and specify a carriage mechanism in WebSocket.

Proposal is to rebase these on TTML. Some design questions:

• TTML1 or TTML2? (the original work is based on TTML1, and no features of TTML2 seem to be needed)
• There is a lot of of explanatory text and worked examples in the original work: reproduce in a similar way or refactor into a brief normative specification and separate informative WG Notes?

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TTML2 and TTML3

No issues or pull requests marked for agenda at this time.

Clarify relative profile designator does not use xml:base (#1033). w3c/ttml2#1054

This pull request has been open for a while - can we address the queries?

Character-related style properties should not apply to ruby containers. w3c/ttml2#1043

We ran out of time last week, can we complete the discussion?

Missing test for #region-timing w3c/ttml2#1073

This could lead to a wider discussion - assign agenda time for it in future meetings?

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Agenda+ AOB

[nigelmegitt]

Regrets from @plehegar and @tmichel07

[gkatsev]

Unfortunately, I have to send my regrets as well.

I've created an initial draft of the Implementation Report on the wiki https://www.w3.org/wiki/TimedText/WebVTT_Implementation_Report. Comments welcome.

I've also made a PR to have a new snapshot with the at-risk items removed from the specification w3c/webvtt#453.

[nigelmegitt]

Minutes at https://www.w3.org/2019/05/09-tt-minutes.html