{agenda} TTWG Meeting 2017-12-14 from Nigel Megitt on 2017-12-13 (public-tt@w3.org from December 2017)

From: Nigel Megitt <nigel.megitt@bbc.co.uk>
Date: Wed, 13 Dec 2017 14:11:29 +0000
To: TTWG <public-tt@w3.org>
Message-ID: <D656E586.508D1%nigel.megitt@bbc.co.uk>
This meeting is scheduled for up to 120m. Please be ready for a prompt start at 10:03am Boston 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=20171214T10&p1=43


Thursdays 10:03am-12:00pm 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: Andreas, Thierry

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. Next Face to Face meeting
2. IMSC 1.1, TTML2, features, namespaces etc
3. TTML2 processor behaviour vs TTML1
4. TTML2 Wide & Horizontal Review
5. IMSC including vNext requirements Note publication proposal
6. TTML1 & TTML2 issues, actions, PRs, editorial actions etc
7. WebVTT feedback (David Singer to Chair if present)
8. HDR in PNG (placeholder)
9. AOB – please notify of any other AOB now!


Reminder re future milestones and meetings:

December meetings:

Thursday 21st December: No meeting?
Thursday 28th December: No meeting?

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


Further ahead:

Thursday 4th January: TTWG meeting ? Hour(s)
Tuesday 9th and Wednesday 10th January: F2F meeting ?
Thursday 18th January: TTWG meeting ? Hour(s)
Thursday 25th January: TTWG meeting ? Hour(s)

Agenda+ Next Face to Face meeting

Results of WBS survey: https://www.w3.org/2002/09/wbs/34314/early2018ttwgf2fplanning/results


Confirm location of 9-10 Jan face to face meeting.

Agenda+ IMSC 1.1, TTML2, features, namespaces etc

Continuing extensive discussion on the email reflector concerning Netflix's objection to the proposals agreed at TPAC, to look for solutions that are acceptable to all, by understanding members' concerns better.

Netflix objection: https://lists.w3.org/Archives/Public/public-tt/2017Nov/0107.html


Check current status and any changes in position;
Clarify timeline and next steps to resolve.

Note also Cyril's work to analyse the actual practical differences – is this complete? If it is, can we address the specifics to understand the alignment/mis-alignment? Are there any resulting actions?

<https://docs..google.com/document/d/1Ri7RBBsbIK9SRxA1KsHRejXbYBuL4CRRrbmEZRbwZpg/edit?usp=sharing>https://docs.google.com/document/d/1Ri7RBBsbIK9SRxA1KsHRejXbYBuL4CRRrbmEZRbwZpg/edit?usp=sharing


Agenda+ TTML2 processor behaviour vs TTML1

Actions
ID      State   Title   Person  Due Date        Associated with
ACTION-510<https://www.w3.org/AudioVideo/TT/tracker/actions/510>[(edit)]<https://www.w3.org/AudioVideo/TT/tracker/actions/510/edit>     pending review  study TTT codebase and report on use of ttp:version to select processor behavior<https://www.w3.org/AudioVideo/TT/tracker/actions/510>  Glenn Adams     2017-11-23      TTML2<https://www.w3.org/AudioVideo/TT/tracker/products/4>



Agenda+ TTML2 Wide and Horizontal Review

Actions
ID      State   Title   Person  Due Date        Associated with
ACTION-508<https://www.w3.org/AudioVideo/TT/tracker/actions/508>[(edit)]<https://www.w3.org/AudioVideo/TT/tracker/actions/508/edit>     open    Check if there are editorial/substantive labels for ttml2 issues and add if not.<https://www.w3.org/AudioVideo/TT/tracker/actions/508>  Thierry Michel  2017-10-12      TTML2<https://www.w3.org/AudioVideo/TT/tracker/products/4>

Can the above action be closed?

Are there still open Internationalisation review issues?

Agenda+ CSS actions review

Are CSS issues filed for all style attributes for which we believe CSS work is needed?

See also https://lists.w3.org/Archives/Public/public-tt/2017Nov/0109.html


CSS WG review

Minutes from TTWG and CSS WG joint meeting at TPAC: https://www.w3.org/2017/11/09-tt-minutes.html#item35

Minutes from CSS WG Paris F2F that Nigel attended remotely on Friday 4th August: https://lists.w3.org/Archives/Public/www-style/2017Sep/0000.html

This is at https://www.w3.org/wiki/TTML/CSSRequirements


TAG design review issue: https://github.com/w3ctag/design-reviews/issues/138


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?


Agenda+ IMSC (now incorporates Unicode ticket)

Actions
ID      State   Title   Person  Due Date        Associated with
ACTION-509<https://www.w3.org/AudioVideo/TT/tracker/actions/509>[(edit)]<https://www.w3.org/AudioVideo/TT/tracker/actions/509/edit>     open    Propose liaison text for the imsc 1.1 fpwd<https://www.w3.org/AudioVideo/TT/tracker/actions/509>        Pierre-Anthony Lemieux  2017-10-12      TTML IMSC 2.0<https://www.w3.org/AudioVideo/TT/tracker/products/10>


Links

IMSC Tests released as v1.0.0 at https://github.com/w3c/imsc-tests/releases/tag/v1.0.0 .

IMSC 1.0.1
IMSC 1.0.1 CR published at https://www.w3.org/TR/2017/CR-ttml-imsc1.0.1-20170713/

IMSC 1.0.1 Implementation report at https://www.w3.org/wiki/TimedText/IMSC1_0_1_Implementation_Report

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.

IMSC Tests repository: https://github.com/w3c/imsc-tests


vNext Requirements
IMSCvNext Requirements editor's draft: https://w3c.github.io/imsc-vnext-reqs/

IMSCvNext Requirements repository: https://github.com/w3c/imsc-vnext-reqs

IMSC 1.1 FPWD: https://www.w3.org/TR/2017/WD-ttml-imsc1.1-20171017/


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


Recent Activity

Merged IMSC pull requests: None
Open IMSC pull requests:
Clarify that tts:fillLineGap does not hide characters<https://github.com/w3c/imsc/pull/283>
New or discussed IMSC issues: None
Closed IMSC issues: None

Merged IMSC Tests pull requests: None
Open IMSC Tests pull requests:
Adds test for linePadding w varying fontSize<https://github.com/w3c/imsc-tests/pull/39>
New or discussed IMSC Tests issues: None
Closed IMSC Tests issues: None

Merged IMSCvNext Requirements pull requests: None
Open IMSCvNext Requirements pull requests:
List features that are excluded from deprecation requirements<https://github.com/w3c/imsc-vnext-reqs/pull/12>
New or discussed IMSCvNext Requirements issues: None
Closed IMSCvNext Requirements issues: None

Agenda sub-topics (pull requests and issues)

PROPOSAL: Publish IMSC v1.1 Requirements as a WG Note

IMSC issues labelled for the agenda: https://github.com/w3c/imsc/labels/agenda :

Clarify that tts:fillLineGap does not hide characters<https://github.com/w3c/imsc/pull/283>
Should itts:forcedDisplay be deprecated? <https://github.com/w3c/imsc/issues/279>
Should ebutts:linePadding be deprecated? <https://github.com/w3c/imsc/issues/278>
Should ebutts:multiRowAlign be deprecated? <https://github.com/w3c/imsc/issues/277>
Should itts:fillLineGap be deprecated? <https://github.com/w3c/imsc/issues/276>
Should ittp:activeArea be deprecated? <https://github.com/w3c/imsc/issues/275>
ttp:displayAspectRatio is prohibited <https://github.com/w3c/imsc/issues/273>
Deprecation of smpte:backgroundImage in favor of tt:image <https://github.com/w3c/imsc/issues/259>
What fillLineGap does/ affects <https://github.com/w3c/imsc/issues/254>

IMSC Requirements issues labelled for the agenda: https://github.com/w3c/imsc-vnext-reqs/labels/agenda :

Specify deprecation model <https://github.com/w3c/imsc-vnext-reqs/issues/14>
is tts:textShadow required? <https://github.com/w3c/imsc-vnext-reqs/issues/13>
List features that are excluded from deprecation requirements <https://github.com/w3c/imsc-vnext-reqs/pull/12>
List features that are excluded from Requirement 1.3 <https://github.com/w3c/imsc-vnext-reqs/issues/11>

IMSC issues blocked: https://github.com/w3c/imsc/labels/blocked

IMSC Requirements issues blocked: https://github.com/w3c/imsc-vnext-reqs/labels/blocked



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

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>


Links

Most recent WD published at https://www.w3.org/TR/2017/WD-ttml2-20170630/


Recent Activity

Merged TTML1 Pull Requests:
Clarified tts:textDecoration inheritance<https://github.com/w3c/ttml1/pull/267>
Clarify semantics in absence of begin attribute<https://github.com/w3c/ttml1/pull/264>
Replaced ttp:frameRateMultipler with ttp:frameRateMultiplier<https://github.com/w3c/ttml1/pull/263>
Clarified cell metrics semantics for tts:textOutline<https://github.com/w3c/ttml1/pull/268>
Clarify zIndex stacking context<https://github.com/w3c/ttml1/pull/259>
Tweak examples of Section O<https://github.com/w3c/ttml1/pull/257>
Fixed EOLs to LF under /spec<https://github.com/w3c/ttml1/pull/274>
Clarified TAB character presentation semantics<https://github.com/w3c/ttml1/pull/258>
Clarify #backgroundColor re: block, inline and region semantics<https://github.com/w3c/ttml1/pull/256>
Improve and fix Travis integration<https://github.com/w3c/ttml1/pull/278>
Travis CO deployment<https://github.com/w3c/ttml1/pull/272>
Merged TTML2 Pull Requests: None
Open TTML1 Pull Requests:
Clarified application of tts:visibility to child elements<https://github.com/w3c/ttml1/pull/270>
<set> elements no longer pruned by ISD<https://github.com/w3c/ttml1/pull/276>
Clarify that the computed value of tts:lineHeight='normal' is 'normal'<https://github.com/w3c/ttml1/pull/260>
Update for PR #260 to resolve #220.<https://github.com/w3c/ttml1/pull/277>
Specify semantics of fontSize in 'em' on region<https://github.com/w3c/ttml1/pull/279>
Fix rgba typo in 8.3.2<https://github.com/w3c/ttml1/pull/280>
Clarify percentage units in padding specification<https://github.com/w3c/ttml1/pull/281>
Remove CVS files and rendered zip files<https://github.com/w3c/ttml1/pull/282>
Deprecate offset-time and fraction component in smpte time base<https://github.com/w3c/ttml1/pull/283>
Added fractional time semantics to Annex N.2<https://github.com/w3c/ttml1/pull/284>
Fixed typo at genericFamilyName<https://github.com/w3c/ttml1/pull/285>
Deprecate leap seconds in media time<https://github.com/w3c/ttml1/pull/286>
Add note re: semantics of circular actor references<https://github.com/w3c/ttml1/pull/287>
Clarify [associate region] algorithm<https://github.com/w3c/ttml1/pull/288>
Open TTML2 Pull Requests:
Issue 0406 style semantics <https://github.com/w3c/ttml2/pull/470>
Fix gamma to 2.0<https://github.com/w3c/ttml2/pull/497>
Coalesce references to URI syntax into a new <uri> value expression (…<https://github.com/w3c/ttml2/pull/488>
Add clipBegin and clipEnd parameter attributes<https://github.com/w3c/ttml2/pull/486>
New TTML1 Issues:
Push to gh-pages with an ssh key<https://github.com/w3c/ttml1/issues/271>
Some repo files have CRLF EOLs<https://github.com/w3c/ttml1/issues/273>
Chained Referential Styling spec vs example mismatch<https://github.com/w3c/ttml1/issues/275>
New TTML2 Issues: None
Closed TTML1 Issues:
Clarify #backgroundColor regarding inclusion of block, inline, region semantics.<https://github.com/w3c/ttml1/issues/255>
Ambiguity regarding tab (U+0009) processing in significant whitespace.<https://github.com/w3c/ttml1/issues/235>
Some repo files have CRLF EOLs<https://github.com/w3c/ttml1/issues/273>
Examples in section O use an unusual tts:displayAlign setting<https://github.com/w3c/ttml1/issues/254>
Paint-On example improvement.<https://github.com/w3c/ttml1/issues/225>
tts:zIndex does not specify the root container zIndex value when "auto" is not specified<https://github.com/w3c/ttml1/issues/241>
Use of cell metric in tts:textOutline.<https://github.com/w3c/ttml1/issues/218>
ttp:frameRateMultiplier typo<https://github.com/w3c/ttml1/issues/236>
No begin times in Pop-On example in Appendix O.<https://github.com/w3c/ttml1/issues/224>
Step 10.4.4.2(6)(a) does not apply to textDecoration.<https://github.com/w3c/ttml1/issues/219>
Push to gh-pages with an ssh key<https://github.com/w3c/ttml1/issues/271>
Closed TTML2 Issues: None
Discussed TTML1 Issues:
<set> elements no longer pruned by ISD<https://github.com/w3c/ttml1/pull/276>
Clarify the semantics of tts:fontSize="2em".<https://github.com/w3c/ttml1/issues/214>
Computed value of lineHeight and inheritance.<https://github.com/w3c/ttml1/issues/220>
Two value percentage fontSize not fully defined.<https://github.com/w3c/ttml1/issues/215>
Agent and actor circular references.<https://github.com/w3c/ttml1/issues/201>
Clarify that the computed value of tts:lineHeight='normal' is 'normal'<https://github.com/w3c/ttml1/pull/260>
tts:overflow does not apply to the region area<https://github.com/w3c/ttml1/issues/239>
Discussed TTML2 Issues: None

Agenda sub-topics (pull requests and issues)

TTML1 issues labelled for the agenda: https://github.com/w3c/ttml1/labels/agenda :

tts:overflow does not apply to the region area <https://github.com/w3c/ttml1/issues/239>
Clarify that the computed value of tts:lineHeight='normal' is 'normal' <https://github.com/w3c/ttml1/pull/260>
Deprecate offset-time and fraction component in smpte time base <https://github.com/w3c/ttml1/pull/283>
Deprecate leap seconds in media time <https://github.com/w3c/ttml1/pull/286>

Then remaining pull requests and issues.

TTML1 issues labelled for the agenda: https://github.com/w3c/ttml1/labels/agenda

TTML1 issues blocked: https://github.com/w3c/ttml1/labels/blocked

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+ 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-502<https://www.w3.org/AudioVideo/TT/tracker/actions/502>[(edit)]<https://www.w3.org/AudioVideo/TT/tracker/actions/502/edit>     open    Explain to david that we need a more consistent disposition of comments for webvtt.<https://www.w3.org/AudioVideo/TT/tracker/actions/502>       Thierry Michel  2017-08-10      WebVTT 1.0<https://www.w3.org/AudioVideo/TT/tracker/products/8>



Links

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


Activity

Open Pull requests:
Class override<https://github.com/w3c/webvtt/pull/418>
Timeranges <https://github.com/w3c/webvtt/pull/419>
Cue setting clarifications <https://github.com/w3c/webvtt/pull/420>
Add a "User agents that do not support CSS" conformance class.<https://github.com/w3c/webvtt/pull/389>
Region clarification issue376<https://github.com/w3c/webvtt/pull/400>
Add a paragraph about the reasons why limiting styles.<https://github.com/w3c/webvtt/pull/410>
Add some introductory paragraphs to the Data model section.<https://github.com/w3c/webvtt/pull/409>
Merged Pull requests:
Add some explanatory text about the different types of VTT files.<https://github.com/w3c/webvtt/pull/394>
New issues: None
Closed issues:
Wide Review Comment 2017: Timestamp syntax<https://github.com/w3c/webvtt/issues/370>
Wide Review Comment 2017: line cue setting direction<https://github.com/w3c/webvtt/issues/382>
CSS support should be optional<https://github.com/w3c/webvtt/issues/260>
Wide Review Comment 2017: Term definition with empty content<https://github.com/w3c/webvtt/issues/364>
Wide Review Comment 2017: Distinction between cue payload types<https://github.com/w3c/webvtt/issues/363>
Wide Review Comment 2017: Text color must be mandatory<https://github.com/w3c/webvtt/issues/365>
Recently discussed issues:
Wide Review Comment 2017: Conformance Classes not complete<https://github.com/w3c/webvtt/issues/361>
Data model definition of WebVTT cue <https://github.com/w3c/webvtt/issues/416>
Wide Review Comment 2017: Use of lines as positioning constructs<https://github.com/w3c/webvtt/issues/378>
Wide Review Comment 2017: positioning model<https://github.com/w3c/webvtt/issues/383>
Wide Review Comment 2017: default font size and line heights<https://github.com/w3c/webvtt/issues/371>
Wide Review Comment 2017: Algorithmic specification<https://github.com/w3c/webvtt/issues/384>
Wide Review Comment 2017: default background colour<https://github.com/w3c/webvtt/issues/372>
Wide Review Comment 2017: position and size reference is video or video viewport?<https://github.com/w3c/webvtt/issues/375>
Unclear definition of time range<https://github.com/w3c/webvtt/issues/415>
Region clarification issue376<https://github.com/w3c/webvtt/pull/400>
Add a paragraph about the reasons why limiting styles.<https://github.com/w3c/webvtt/pull/410>
Add some introductory paragraphs to the Data model section.<https://github.com/w3c/webvtt/pull/409>
Add a "User agents that do not support CSS" conformance class.<https://github.com/w3c/webvtt/pull/389>

Agenda+ HDR in PNG [placeholder agenda item]

Links

We published this Note at https://www.w3.org/TR/png-hdr-pq/ (republished 25th July incorporating fix for typo)

Repo for PQ HDR in PNG: https://github.com/w3c/png-hdr-pq

Draft WG Note: https://w3c.github.io/png-hdr-pq/


Activity

Merged pull requests: None
Open pull requests: None
New or discussed issues: None
Closed issues: None


Agenda+ AOB

References

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





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Received on Wednesday, 13 December 2017 14:12:03 UTC