{agenda} TTWG Meeting 2017-02-09

This meeting is scheduled for up to 60m. Please be ready for a prompt start at 11:03am Boston time.

Once again, at the new time 1 hour later than the "old" time

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

Check https://www.timeanddate.com/worldclock/fixedtime.html?iso=20170209T11&p1=43

Thursdays 11:03am-12:00pm (or from 10:00am for 2 hour meetings) Boston local

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)

Agenda+ Assign Roles

Chairs: Nigel Megitt

Scribe: usually Nigel – open to offers!

Regrets: none

Activity since last meeting:
See individual agenda items for recent activity on specific products

Cross-product TTWG board: http://www.w3.org/AudioVideo/TT/board/
We are still using tracker for actions unrelated to issues.
Please do not add or modify issues in tracker!

IMSC: https://github.com/w3c/imsc/pulse
TTML1: https://github.com/w3c/ttml1/pulse
TTML2: https://github.com/w3c/ttml2/pulse
TTML Profile Registry: https://github.com/w3c/tt-profile-registry/pulse
TTML-WebVTT mapping: https://github.com/w3c/ttml-webvtt-mapping/pulse
WebVTT: https://github.com/w3c/webvtt/pulse

Agenda+ Prioritise discussion for this meeting and look ahead

Check-point for order of topics – I'd suggest, subject to reordering:
1. IMSC (now incorporates Unicode ticket)
2. TTML issues, actions, PRs etc
3. Progress on HTMLCue proposal (placeholder)
4. WebVTT comments (placeholder)
5. AOB – please notify of any other AOB now!


Reminder re future milestones and meetings:

February Meetings:

Thursday 9th February: TTWG phone meeting 1 hour
Thursday 16th February: TTWG phone meeting 1 hour
Thursday 23rd February: TTWG phone meeting 1 hour

Further ahead:

Thursday 2nd March: TTWG phone meeting 1 hour (NM hard stop at end)
Thursday 9th March: TTWG phone meeting 1 hour
Thursday 16th March: TTWG phone meeting 1 hour
Thursday 23rd March: TTWG phone meeting 1 hour
Thursday 30th March: TTWG phone meeting 1 hour

IMSC 2 and TTML2 publication events: see the timeline of upcoming work at https://www.w3.org/wiki/TimedText/Publications#Timeline_of_TTML2_and_IMSC2_work


Agenda+ IMSC (now incorporates Unicode ticket)

IMSC 1.0.1 update

IMSC 1.0.1 FPWD published at https://www.w3.org/TR/ttml-imsc1.0.1/
IMSC 1 Rec available at https://www.w3.org/TR/2016/REC-ttml-imsc1-20160421/
Patent policy call for exclusions sent 2017-02-03, archived at https://lists.w3.org/Archives/Public/public-tt/2017Feb/0006.html

Editor's draft is directly viewable at http://w3c.github.io/imsc/imsc1/spec/ttml-ww-profiles.html
IMSC Implementation Page: https://www.w3.org/wiki/TimedText/IMSC1_implementation_page.

Unicode CLDR discussion
Unicode ticket is at http://unicode.org/cldr/trac/ticket/8915
Pierre's response to the recent update is at http://unicode.org/cldr/trac/ticket/8915#comment:9
Email response from Shervin at Unicode https://lists.w3.org/Archives/Public/public-tt/2016Dec/0018.html

Merged pull requests: none
Open pull requests:
Fixes typo in altText example <https://github.com/w3c/imsc/pull/207>
New or discussed issues: none
Closed issues: none


Agenda+ TTML1 & TTML2 issues, actions, PRs, editorial actions etc

Horizontal Review:

CSS Review of TTML2, threads: FW: TTML2 horizontal review with CSS<https://lists.w3.org/Archives/Public/public-tt/2016Dec/0013.html> and Fwd: Subtitle/caption styling + TTML + CSS<https://lists.w3.org/Archives/Public/public-tt/2016Dec/0019.html>

CSS 2.2 request for reviews from TTWG et al: Pre-announcement of CR for CSS 2.2 & request for reviews<https://lists.w3.org/Archives/Public/public-tt/2016Dec/0017.html> When can we schedule a review and gather feedback?

Actions:
ID      State   Title   Person  Due Date        Associated with
ACTION-443<https://www.w3.org/AudioVideo/TT/tracker/actions/443>[(edit)]<https://www.w3.org/AudioVideo/TT/tracker/actions/443/edit>     open    Prepare a document showing mapping arib ruby extension features to ttml2 for use as a liaison document to arib.<https://www.w3.org/AudioVideo/TT/tracker/actions/443>   Glenn Adams     2016-08-26      TTML2<https://www.w3.org/AudioVideo/TT/tracker/products/4>
ACTION-462<https://www.w3.org/AudioVideo/TT/tracker/actions/462>[(edit)]<https://www.w3.org/AudioVideo/TT/tracker/actions/462/edit>     open    Create issue on ttml2 to add "mapping from other versions and profiles of ttml"<https://www.w3.org/AudioVideo/TT/tracker/actions/462>   Glenn Adams     2016-04-28      TTML2<https://www.w3.org/AudioVideo/TT/tracker/products/4>

Most recent WD published at https://www.w3.org/TR/2017/WD-ttml2-20170106/

Merged Pull Requests:
Issue 0222 padding percentage<https://github.com/w3c/ttml2/pull/241>
Add tts:textShadow example and modify semantics<https://github.com/w3c/ttml2/pull/218>
Apply additional style properties to tt:image, allow @style on tt:image (#232).<https://github.com/w3c/ttml2/pull/234>
Open Pull Requests:
Clarify application of padding (#221)<https://github.com/w3c/ttml1/pull/233>
New TTML1 Issues: none
New TTML2 Issues:
<emphasis-position> vs CSS text-emphasis-position + Mongolian<https://github.com/w3c/ttml2/issues/240>
3D and images<https://github.com/w3c/ttml2/issues/239>
Closed TTML1 Issues: none
Closed TTML2 Issues:
Percentage values in `tts:padding` do not match CSS<https://github.com/w3c/ttml2/issues/222>
Typo in Note in 10.3.7.<https://github.com/w3c/ttml2/issues/223>
Typos in Examples in Appendix P.<https://github.com/w3c/ttml2/issues/226>
No begin times in Pop-On example in Appendix P.<https://github.com/w3c/ttml2/issues/227>
Rename safeCropArea to activeArea<https://github.com/w3c/ttml2/issues/235>
Apply missing style properties to tt:image.<https://github.com/w3c/ttml2/issues/232>
Discussed TTML1 Issues: none
Discussed TTML2 Issues:
Mismatch between CSS and TTML2 text align styling on <span><https://github.com/w3c/ttml2/issues/238>
The term "vertical scripts" needs formal definition.<https://github.com/w3c/ttml2/issues/230>
Add support for compositing a TTML2 document onto HDR video<https://github.com/w3c/ttml2/issues/233>
http://www.w3.org/ns/ttml/profile/imsc1/extension/#linePadding is not supported<https://github.com/w3c/ttml2/issues/237>

Focus topic for this week
3rd (or 4th) time lucky?
Please prepare your thoughts for discussion of what background-on-span-affecting semantics should be supported in TTML2, covering at least the issues:
Should background of a span be height of text in line or computed lineHeight? #101<https://github.com/w3c/ttml2/issues/101>
Ways to make span background height be lineHeight #150<https://github.com/w3c/ttml2/issues/150>
Clarify semantics of content bpd for inline and line areas #163<https://github.com/w3c/ttml2/issues/163>
Add support for adjacent background area merging #189<https://github.com/w3c/ttml2/issues/189>
This is in the context also of how we resolve the recently discussed IMSC 1.1 issue: Control background between adjacent lines <https://github.com/w3c/imsc/issues/195>

If we have time I would also like us to begin thinking about:
Add security and privacy section. #224<https://github.com/w3c/ttml2/issues/224>


Current open issues: https://github.com/w3c/ttml1/issues and https://github.com/w3c/ttml2/issues
See spreadsheet of editorial actions at https://github.com/w3c/ttml2/blob/master/spec/ednotes.xlsx
Edit/build instructions now in README in ttml2/spec/ at https://github.com/w3c/ttml2/blob/master/spec/README.md


Agenda+ HTMLCue proposal progress update.

ID      State   Title   Person  Due Date        Associated with
ACTION-441<https://www.w3.org/AudioVideo/TT/tracker/actions/441>[(edit)]<https://www.w3.org/AudioVideo/TT/tracker/actions/441/edit>     open    Kick off the analysis work on the vttcue carrying html idea.<https://www.w3.org/AudioVideo/TT/tracker/actions/441>      Andreas Tai     2015-11-05


See https://lists.w3.org/Archives/Public/public-tt/2016Apr/0012.html for further information on this, this week.

Also HTML import and HTMLCue?<https://lists.w3.org/Archives/Public/public-tt/2016Sep/0003.html> email from 2016-09-06.

[placeholder agenda item]

Agenda+ WebVTT review feedback

ID      State   Title   Person  Due Date        Associated with
ACTION-396<https://www.w3.org/AudioVideo/TT/tracker/actions/396>[(edit)]<https://www.w3.org/AudioVideo/TT/tracker/actions/396/edit>     open    Produce evidence of request for wide review for webvtt, for the archive<https://www.w3.org/AudioVideo/TT/tracker/actions/396>   David Singer    2015-04-17      WebVTT 1.0<https://www.w3.org/AudioVideo/TT/tracker/products/8>
ACTION-473<https://www.w3.org/AudioVideo/TT/tracker/actions/473>[(edit)]<https://www.w3.org/AudioVideo/TT/tracker/actions/473/edit>     open    Contact co-chairs and essential parties on how to move forward on vtt; need an action plan<https://www.w3.org/AudioVideo/TT/tracker/actions/473>        Thierry Michel  2016-06-30      WebVTT 1.0<https://www.w3.org/AudioVideo/TT/tracker/products/8>

Discussion on WebVTT review feedback and next steps.

WebVTT Wide review wiki page: https://www.w3.org/wiki/WebVTT_Wide_Review

Open Pull requests: Add requirements for region identifier to exist.<https://github.com/w3c/webvtt/pull/201>.<https://github.com/w3c/webvtt/pull/201>
Merged Pull requests: Fix for #325<https://github.com/w3c/webvtt/pull/326>
New issues:
Unused Variable 'seen cue'<https://github.com/w3c/webvtt/issues/324>
Closed issues:
Wrong name in 'collect WebVTT region settings'<https://github.com/w3c/webvtt/issues/325>
Recently discussed issues:
Add Security and Privacy Considerations section<https://github.com/w3c/webvtt/issues/323>

Agenda+ AOB

References

Wiki http://www.w3.org/wiki/TimedText