See also: IRC log
<mike> regrets from me on audio - just lurking on IRC today
<scribe> scribe: nigel
nigel: It's been a couple of
weeks - shall we cover mainly TTML?
... In AOB I'd like to mention a BBC submission also
... AOB?
group: No AOB.
nigel: I'm about to take a 2 week vacation. Would anyone like to chair while I'm absent?
glenn: I may be able to, but need to confirm.
nigel: Okay, thanks - let's catch up on that later.
nigel: Since we last met our new
Charter has been approved!
... https://www.w3.org/2016/05/timed-text-charter.html
<scribe> ACTION: tmichel Update TTWG home page to point to new Charter [recorded in http://www.w3.org/2016/06/09-tt-minutes.html#action01]
<trackbot> Created ACTION-471 - Update ttwg home page to point to new charter [on Thierry Michel - due 2016-06-16].
nigel: I don't think we have any
specific topics to mention for IMSC today, but we did
... publish the press release, which has already begun some
conversations in industry.
nigel: First can we cover the
pull request process proposal?
... I think I've verified that all parties are happy with the
current proposal, as described
... in the agenda, to allow for early merge with labelling, and
a minimum 3 business days
... between opening a PR and merging it.
PROPOSAL: Accept the proposed process as described in the agenda for a trial period of 3 months and then review it.
RESOLUTION: Accept the proposed process as described in the agenda for a trial period of 3 months and then review it.
nigel: It's also worth noting
that Glenn has described how this works for TTML2 at
... https://github.com/w3c/ttml2/blob/gh-pages/EDITING.md
... Thanks all for helping us get to this agreement.
... Let's move to Actions.
action-386?
<trackbot> action-386 -- Glenn Adams to Investigate whether region style inheritance from tt is necessary given the ability to redefine initial values -- due 2015-04-17 -- PENDINGREVIEW
<trackbot> http://www.w3.org/AudioVideo/TT/tracker/actions/386
glenn: [describes comment in the
action]. It is possible that the two mechanisms overlap
... in some cases, but we don't have an issue to solve
here.
... So that's the investigation, which fulfils the action.
nigel: What are the cases where it is desirable to use root inheritance but not override the initial value on a inheritable style?
glenn: It's an authorial decision
and also to do with what is efficient.
... I made some notes on this and found that for translating
into TTML in some cases it
... is better to use initial and in others to use root
inheritance. I'm not sure that we have
... enough implementation experience here either.
... I would like a concrete set of test sequences that verify
this. I wouldn't object to
... returning to this question again later as we get closer to
CR, to see what the TTPE and
... TTV implementation experience tells us. Originally the root
inheritance was intended
... to allow common inheritable styles for region
elements.
... Later on we realised there was also a need to override
initial values when they are left
... to be implementation dependent like tts:color. Both of
those feature requests go back
... to an earlier list of change proposals and items listed in
those. So they had two
... different origins. That's how we got here. The implicit
proposal is to merge them
... together. It makes it a little more complicated to describe
in the spec that way. I have
... to admit that implementing and testing both is a little
more work. I'm not comfortable
... merging them at this point but I'd like to see where
implementation experience takes us.
close action-386
<trackbot> Closed action-386.
action-404?
<trackbot> action-404 -- Glenn Adams to Add note to issue 341 to reflect his current thinking -- due 2015-06-11 -- PENDINGREVIEW
<trackbot> http://www.w3.org/AudioVideo/TT/tracker/actions/404
glenn: Issue-341 is a tracker issue, just to be clear.
issue-341?
<trackbot> issue-341 -- ambiguous definition for determination of descendant region identifier -- open
<trackbot> http://www.w3.org/AudioVideo/TT/tracker/issues/341
glenn: I need folk to look at and
think about and respond to this. We need to make a
... design choice. I have proposed a particular option out of
4.
https://github.com/w3c/ttml1/issues/194
nigel: There is no equivalent
TTML2 issue.
... I think this relates also to the processing of implied
anonymous inline regions,
... where a proposal made was, rather then the current semantic
of creating a new
... anonymous region, that instead the currently selected
region would be modified if a
... region style attribute such as tts:origin were specified on
an element, e.g. a <p>.
<glenn> glenn: i'm not ready to concede this is a good or useful idea, i.e., having an anonymous region somehow override a region derived from an ancestor
nigel: Since I can't see an issue for this, I need to go back and look and make sure there is one so we don't lose this.
<glenn> glenn: i think this will probably complicate processing in a big way
nigel: My reasoning is that I
*think* when people specify origin or extent on a div or a
p
... this is what they expect, to modify the current region and
retain all style settings.
<scribe> ACTION: nigel make sure there is a TTML2 issue for considering adjustment of inline region semantics [recorded in http://www.w3.org/2016/06/09-tt-minutes.html#action02]
<trackbot> Created ACTION-472 - Make sure there is a ttml2 issue for considering adjustment of inline region semantics [on Nigel Megitt - due 2016-06-16].
glenn: We need to figure out what we think should be right and then figure out how badly that may break anything.
<tmichel> tmichel: no specific view
close action-404
<trackbot> Closed action-404.
action-458?
<trackbot> action-458 -- Glenn Adams to Create issue re: line height calculation for inline -- due 2016-04-07 -- PENDINGREVIEW
<trackbot> http://www.w3.org/AudioVideo/TT/tracker/actions/458
glenn: I created https://github.com/w3c/ttml1/issues/212
nigel: Thank you. Do we need an equivalent for TTML2?
glenn: Probably! Generally errata
in TTML1 create an issue in TTML2
... I'll go ahead and create an issue in TTML2 and cross
reference the TTML1 issue URL
close action-458
<trackbot> Closed action-458.
nigel: I'd like to mention the submission that I made just at the start of this meeting.
https://lists.w3.org/Archives/Public/public-tt/2016Jun/0003.html
nigel: This comes partly out of
work done in another group, where we were considering
... the case that TTML is used for subtitles or captions over
video in one video aspect ratio
... when the video is displayed on a different aspect ratio and
partially cropped as a result.
<glenn> created github issue for ttml2 https://github.com/w3c/ttml2/issues/163 related to ttml1 issue 212; semantics of line height, inline height
glenn: Another issue that may be
related is that there's some desire to specify
positioning
... of subtitles outside the root container region, or have it
be larger than a video frame.
... For example with letter box where you want the subtitles to
appear beneath or above
... content in black bars.
action-470?
<trackbot> action-470 -- Nigel Megitt to Update the publications wiki page for the profile registry -- due 2016-05-26 -- PENDINGREVIEW
<trackbot> http://www.w3.org/AudioVideo/TT/tracker/actions/470
nigel: I did that.
close action-470
<trackbot> Closed action-470.
nigel: We also have action-468 and action-469 on plh
tmichel: I have no update but will look into it.
nigel: There's also a useful
process point to note, which is that the W3C pull request
... checker (ash-nazg) now has an option for marking pull
requests as non-substantive,
... and this has been used on https://github.com/w3c/tt-profile-registry/pull/20
... which means that the Editor can now merge this safely
without worrying about IPR.
glenn: Registration is now open.
nigel: Thanks for the reminder!
https://www.w3.org/2016/09/TPAC/
... Registration: https://www.w3.org/2002/09/wbs/35125/TPAC2016/?login
... Okay. Thanks everyone, I'll be back here in 3 weeks!
[adjourns meeting]