{minutes} TTWG Meeting 2015-04-16

All,

Thanks for attending today's TTWG meeting. Minutes in HTML format can be found at: http://www.w3.org/2015/04/16-tt-minutes.html


In text format:


   [1]W3C

      [1] http://www.w3.org/


                Timed Text Working Group Teleconference

16 Apr 2015

   See also: [2]IRC log

      [2] http://www.w3.org/2015/04/16-tt-irc


Attendees

   Present
          nigel, tmichel, courtney, Frans, glenn

   Regrets
          dsinger, atai, jdsmith

   Chair
          nigel

   Scribe
          nigel

Contents

     * [3]Topics
         1. [4]This meeting
         2. [5]Action items
         3. [6]WebVTT
     * [7]Summary of Action Items
     __________________________________________________________

   <trackbot> Date: 16 April 2015

   <scribe> scribe: nigel

This meeting

   nigel: This meeting will likely be action heavy following last
   week. AOB?

   group: no AOB

   nigel: I haven't managed to fix up the minutes from last week -
   hopefully I'll be able to do that tomorrow.
   ... In the meantime did anyone have any changes to make based
   on the draft minutes?

   group: No changes

   nigel: In that case it's mainly a tidying job not an editorial
   one.
   ... So for today we'll look at actions and I'll set aside some
   time for WebVTT as there's been progress there.

   glenn: I'm going to have to drop off this meeting; no progress
   on actions or issues to report.

Action items

   action-378?

   <trackbot> action-378 -- Pierre-Anthony Lemieux to Draft smpte
   request including dispositions from action-369 and
   backgroundcolor initial value question -- due 2015-03-05 --
   OPEN

   <trackbot>
   [8]http://www.w3.org/AudioVideo/TT/tracker/actions/378


      [8] http://www.w3.org/AudioVideo/TT/tracker/actions/378


   nigel: Pierre has posted a draft for review:
   [9]https://docs.google.com/document/d/1ohVIVM_lcsWooOPIsfnjHS7P

   nbRdON_ygydgo2V7fB4/edit
   ... Thanks for doing that.

      [9] https://docs.google.com/document/d/1ohVIVM_lcsWooOPIsfnjHS7PnbRdON_ygydgo2V7fB4/edit


   pal: Inline space was missing from nigel's draft. Was that just
   an omission?

   nigel: No particular reason - most likely I just didn't notice
   it in the original message from SMPTE.

   pal: I used the latest message from SMPTE from January that was
   sent to public-tt rather than the
   ... earlier one that was sent to member-tt.

   nigel: That may be the difference then.

   pal: SMPTE ST428-7 specifies character rotation on any
   character but the TTML2 spec only allows it on
   ... on normally horizontal characters in vertical writing
   modes.

   nigel: We need to make clear that SMPTE can come back to us if
   they have use cases that we haven't
   ... considered.

   pal: Exactly. We could ask generally for SMPTE's responses or
   specifically request a request for each item.

   nigel: I'd like to make it clear that we'd like a response on
   each item as this is very similar to a request
   ... for wide review type response.

   pal: We shouldn't hold open the issues until SMPTE has
   responded.

   nigel: Agreed - we should close these issues and if SMPTE or
   anyone else comes back with new problems
   ... we can open new issues.

   pal: [drafts specific request]

   nigel: The dispositions tool generates email text that looks
   like:
   ... "The Working Group's response to your comment is included
   below.
   ... Please review it carefully and *let us know by email at
   [address] if you agree with it or not
   ... before [date]*.

   pal: I would keep it less formal and provide this as a heads-up
   - if SMPTE has formal comments then
   ... they can send them or wait until wide review.

   nigel: Yes, the original comments predate the FPWD so they
   can't be construed as any kind of wide
   ... review of TTML2, more of TTML1 if anything.
   ... Okay let's keep it less formal for now. Current wording is
   ... "W3C TTWG looks forward to SMPTE’s feedback on these
   actions, if any, and to a continued collaboration."

   pal: I created the inline space text based on my understanding
   of ipd.

   nigel: That disposition text looks good to me.
   ... Since Glenn has written the ipd part of TTML2 it would be
   good to get his go-ahead for this disposition.

   <scribe> ACTION: glenn Review Disposition text for Inline
   space/ipd for SMPTE [recorded in
   [10]http://www.w3.org/2015/04/16-tt-minutes.html#action01]

   <trackbot> Created ACTION-399 - Review disposition text for
   inline space/ipd for smpte [on Glenn Adams - due 2015-04-23].

   nigel: Once that action is complete then in my view we can send
   this to SMPTE via Mike and close the
   ... outstanding issues.
   ... I've marked action-378 as pending review.

   Action-378: Action-399 created specifically for Glenn to review
   ipd response

   <trackbot> Notes added to Action-378 Draft smpte request
   including dispositions from action-369 and backgroundcolor
   initial value question.

   nigel: Let's quickly step through the next actions...
   ... On Action-390 and 391 that's in progress - I'm held up with
   some CSS issues right now.

   courtney: I think David Singer has the dispositions for WebVTT
   covered but haven't talked to him about it re Action-394.

   nigel: He sent a spreadsheet around earlier in the week.
   ... There's been a bit of email conversation between me, David,
   Thierry and Silvia about this, offlist.
   ... So its safe to say progress is being made.

   tmichel: The Accessibility WG said they're working on the
   WebVTT review and will come back with a date.
   ... That was the last message from Julie I think.

   nigel: So we don't have a date for a date?

   tmichel: I'll wait a week and then ping them again.

   action-397?

   <trackbot> action-397 -- Pierre-Anthony Lemieux to Prepare cr2
   transition version (after closing one remaining issue on imsc
   1) -- due 2015-04-17 -- OPEN

   <trackbot>
   [11]http://www.w3.org/AudioVideo/TT/tracker/actions/397


     [11] http://www.w3.org/AudioVideo/TT/tracker/actions/397


   pal: On Action-397, we haven't resolved the outstanding issue
   with begin yet. I tried to go through
   ... SMIL and the best I found is that if begin is not specified
   then it's up to the time container. If you
   ... recursively follow that all the way to the top, then the
   begin of body is the begin of the external
   ... time container. Is that your understanding too?

   nigel: Yes.

   pal: I expect to have a resolution to that very shortly.

   nigel: There is a use case for no begin time, which is when you
   just want the document to be
   ... processed as soon as possible. This might happen in live
   use cases. Of course you don't really know
   ... when that display time will start.

   pal: If you have multiple consecutive documents then it's a lot
   easier if you specify begin times.

   nigel: Right, but that does give the container freedom to
   resolve the begin and end of each document.
   ... Maybe we should leave IMSC 1 as it is or add a note saying
   that if you have a time container
   ... then watch out for the unresolvable time scenario.

   pal: Alternately an external time container that says 'start at
   5s' should define when t=0 is.

   nigel: For me, I think requiring a begin time is a bit too
   limiting, but highlighting the danger would be good.

   pal: Okay then a note highlighting the time resolution feature
   of TTML and the potential danger could
   ... be the way to go.

   nigel: You could say that time containers that only indicate
   'start playing 5s in' should treat the
   ... resolved begin time as 'now - 5s' and step in as though
   that had happened.

   pal: I'll draft something suggesting that an absent begin
   should be treated as begin at 0.

   nigel: I'm happy to review that when I see the wording.

   issue-382?

   <trackbot> issue-382 -- Require a computed non-indefinite begin
   time -- open

   <trackbot>
   [12]http://www.w3.org/AudioVideo/TT/tracker/issues/382


     [12] http://www.w3.org/AudioVideo/TT/tracker/issues/382


   nigel: By the way, that discussion above related to issue-382.

WebVTT

   nigel: I just want to make sure that there's an opportunity to
   raise any further WebVTT points not already
   ... raised?

   courtney: Not from me just now.

   nigel: We have no AOB, so I'll adjourn now. Thanks everyone!
   [adjourns meeting]

Summary of Action Items

   [NEW] ACTION: glenn Review Disposition text for Inline
   space/ipd for SMPTE [recorded in
   [13]http://www.w3.org/2015/04/16-tt-minutes.html#action01]

   [End of minutes]
     __________________________________________________________


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Received on Thursday, 16 April 2015 15:16:03 UTC