- From: Nigel Megitt <nigel.megitt@bbc.co.uk>
- Date: Thu, 30 Jul 2015 15:01:45 +0000
- To: Timed Text Working Group <public-tt@w3.org>
- Message-ID: <D1DFF8D8.24171%nigel.megitt@bbc.co.uk>
Thanks all for attending today's meeting. Minutes can be found in HTML format at http://www.w3.org/2015/07/30-tt-minutes.html
In text format:
[1]W3C
[1] http://www.w3.org/
Timed Text Working Group Teleconference
30 Jul 2015
See also: [2]IRC log
[2] http://www.w3.org/2015/07/30-tt-irc
Attendees
Present
nigel, pal, glenn, Frans
Regrets
thierry, andreas
Chair
nigel
Scribe
nigel
Contents
* [3]Topics
1. [4]This Meeting
2. [5]Action Items
3. [6]Issues
4. [7]TPAC 2015
5. [8]IMSC CR2, Test Suite and Implementation Report
6. [9]AOB
* [10]Summary of Action Items
__________________________________________________________
<trackbot> Date: 30 July 2015
<scribe> scribe: nigel
This Meeting
nigel: AOB? From me: the new W3 Process
group: no AOB
Action Items
action-409?
<trackbot> action-409 -- Pierre-Anthony Lemieux to Discuss
liaison with unicode with richard ishida -- due 2015-07-09 --
PENDINGREVIEW
<trackbot>
[11]http://www.w3.org/AudioVideo/TT/tracker/actions/409
[11] http://www.w3.org/AudioVideo/TT/tracker/actions/409
nigel: Thanks pal for the email to the reflector earlier.
pal: I'm happy to draft that as a note for Unicode.
nigel: Your update addresses my feedback, and you've clarified
that when localizedSets reference
... commonSets they are *including* by reference.
Action-409: [Meeting 2015-07-30] pal to draft a more formal
text to send to Unicode, then check in with Richard Ishida,
then Nigel (as chair) to send to Mark at Unicode when it's
okay.
<trackbot> Notes added to Action-409 Discuss liaison with
unicode with richard ishida.
nigel: I've mentioned the idea of this to at least one other
group I'm working with and they wanted more detail but were in
principle in favour, and could lend their support.
pal: I'll add this additional more concrete information to the
draft liaison.
nigel: Sounds perfect.
Issues
issue-398?
<trackbot> issue-398 -- Add IMSC1 in title of IMSC1 -- pending
review
<trackbot>
[12]http://www.w3.org/AudioVideo/TT/tracker/issues/398
[12] http://www.w3.org/AudioVideo/TT/tracker/issues/398
nigel: Pierre has done this - it's a change of title of IMSC 1
as discussed.
pal: That's correct.
nigel: So now it's "TTML Profiles for Internet Media Subtitles
and Captions 1.0 (IMSC1)"
close issue-398
<trackbot> Closed issue-398.
glenn: So you added (IMSC1) at the end.
nigel: and subtracted "Text and Image"
glenn: Looks good.
nigel: I have another issue that may be worth raising. Consider
a ttm:agent that contains a
... ttm:actor, which references that ttm:agent.
... A naive implementation could process all the actors, find
one that references its own parent,
... follow that through, add an actor to the list, and loop
forever. I don't think there's a substantive
... problem with the spec, and it's a function of the naivety
of the implementation, but we could
... add an Informative Note to point out the problem at least.
glenn: I never thought of that possibility. I wonder if it
makes sense semantically.
... Let's open an issue for it, and we may want to create an
errata for TTML1 that excludes that
... usage, unless we can think of a usage.
nigel: Okay I'll do that. The other possible resolution is to
add an informative note warning
... developers about the possibility. I think it's the only
place in the spec where there is any chance
... of having a circular reference in that way.
<scribe> ACTION: nigel Raise issue regarding actor and agent
references [recorded in
[13]http://www.w3.org/2015/07/30-tt-minutes.html#action01]
<trackbot> Created ACTION-410 - Raise issue regarding actor and
agent references [on Nigel Megitt - due 2015-08-06].
nigel: Another resolution might be to remove the ability to
contain an actor in agent.
glenn: That's a major structural change.
nigel: Yes it would be!
... Okay I'll go ahead and raise that issue against TTML1.
glenn: It'd be interesting to see what I did in the TTV
verifier for this. I don't think I have a test case for it.
TPAC 2015
nigel: We have a wiki page, registration is open, we have a
schedule.
... For the agenda, I think we need something about HTMLCue and
meeting with HTML WG,
... something about charter renewal, presumably some TTML2
review, hopefully some TTML-WebVTT
... mapping review work also.
... I may add to the Charter discussion some work BBC has been
doing on responsive subtitles
... where work would be needed on the presentation behaviour,
which would likely be
... interesting to many people. Also on a similar topic, APIs
for modifying presentation dependent
... on other on-screen user interface elements that may clash
with subtitles or captions.
glenn: That seems like a very generic question. It seems like
it's out of the scope of TTML but
... in scope of how TTML is embedded in some processing
environment.
nigel: Well since condition was introduced to TTML2, if you're
prepared to permit on the fly
... processing of conditions then that could be used to do
this, by setting parameters that
... result in different presentation.
glenn: That's true, there are a lot of ways to conditionalise
the content. Certainly you could
... author the content based on defined states.
... Do they have specific scenarios in mind?
nigel: Yes, they do, such as "controls are visible", "advert is
visible" etc. but the more general
... mechanism might be to signal priorities and layers and
areas of the screen to avoid or prefer.
... Or another way would be to expose as an API some of the
processing details of the TTML and
... allow e.g. javascript events to modify positions as a
result.
glenn: You could have a generic accessor for environment
variables that could be used to affect
... presentation. That content wouldn't be truly portable
unless we define the names ourselves,
... but if we're doing that then we don't need the generic
getEnv('xxx') approach.
IMSC CR2, Test Suite and Implementation Report
nigel: Frans pointed out recently that
[14]https://dvcs.w3.org/hg/ttml/file/tip/ttml-ww-profiles/tests
uite/multiRowAlign/multiRowAlign1.ttml
... isn't actually EBU-TT-D compatible.
[14] https://dvcs.w3.org/hg/ttml/file/tip/ttml-ww-profiles/testsuite/multiRowAlign/multiRowAlign1.ttml
Frans: Yes, that uses named colours - it would be nice if they
could be hex colours. There are one
... or two other changes too. I can summarise them in an issue.
nigel: The wider point for me is: would it cause any problems
to change tests at this stage?
pal: I can't think of any reason not to do it.
Frans: Shall I raise this as an issue then?
<scribe> ACTION: Frans Raise an issue requesting that IMSC 1
tests for multiRowAlign and linePadding be made fully EBU-TT-D
compatible. [recorded in
[15]http://www.w3.org/2015/07/30-tt-minutes.html#action02]
<trackbot> Created ACTION-411 - Raise an issue requesting that
imsc 1 tests for multirowalign and linepadding be made fully
ebu-tt-d compatible. [on Frans de Jong - due 2015-08-06].
AOB
nigel: I wanted to mention the new W3 Process document.
... It's at [16]http://www.w3.org/2015/Process-20150901/
... Changes are summarised at the end. This will apply to us
from 1 September with no
... further action required for us to adopt it.
... The only thing I can see that could affect us is ยง6.3.2
that recommends us to publish new
... WDs of WDs that haven't changed in the last 6 months. That
might apply to WebVTT and TTML2
... if we haven't published a new version by 1 September, but
it's a SHOULD not a SHALL.
... We've hit the end of our agenda, so I'll adjourn. Have a
good week everyone! [adjourns meeting]
[16] http://www.w3.org/2015/Process-20150901/
Summary of Action Items
[NEW] ACTION: Frans Raise an issue requesting that IMSC 1 tests
for multiRowAlign and linePadding be made fully EBU-TT-D
compatible. [recorded in
[17]http://www.w3.org/2015/07/30-tt-minutes.html#action02]
[NEW] ACTION: nigel Raise issue regarding actor and agent
references [recorded in
[18]http://www.w3.org/2015/07/30-tt-minutes.html#action01]
[End of minutes]
__________________________________________________________
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Received on Thursday, 30 July 2015 15:02:21 UTC