- From: Nigel Megitt <nigel.megitt@bbc.co.uk>
- Date: Thu, 5 Jun 2014 15:09:40 +0000
- To: Timed Text Working Group <public-tt@w3.org>
- Message-ID: <CFB64674.1EA14%nigel.megitt@bbc.co.uk>
Available at: http://www.w3.org/2014/06/05-tt-minutes.html
[1]W3C
[1] http://www.w3.org/
- DRAFT -
Timed Text Working Group Teleconference
05 Jun 2014
See also: [2]IRC log
[2] http://www.w3.org/2014/06/05-tt-irc
Attendees
Present
Frans-EBU, Plh, dsinger, glenn, jdsmith, nigel, pal,
plh, tmichel
Regrets
mdolan
Chair
nigel
Scribe
nigel
Contents
* [3]Topics
1. [4]TPAC F2F
2. [5]Actions pending review
3. [6]Change Proposal 12, Profiles and Features
4. [7]Pending Review Issues
5. [8]AOB
* [9]Summary of Action Items
__________________________________________________________
<trackbot> Date: 05 June 2014
<scribe> scribeNick: nigel
TPAC F2F
nigel: Philippe told us this week that we can't meet on Monday
and Friday as requested but could do Monday and Thursday
tmichel: It's due to lack of meeting room space.
RESOLUTION: We will meet at TPAC on the Monday and Thursday
Actions pending review
action-232?
<trackbot> action-232 -- Glenn Adams to Consider also defining
@validation on ttp:profile, in addition to (override) tt:tt --
due 2014-04-01 -- PENDINGREVIEW
<trackbot>
[10]http://www.w3.org/AudioVideo/TT/tracker/actions/232
[10] http://www.w3.org/AudioVideo/TT/tracker/actions/232
glenn: I added a validation and validationAction attribute.
nigel: We had discussion about the default value being warn
instead of abort
glenn: I still prefer it to be abort.
nigel: I have in mind the case that the user wishes to present
a document of unknown provenance but the default
validationAction causes an abort
close action-232
<trackbot> Closed action-232.
<glenn> action glenn to define default for @validationAction to
be warn if @validation is optional; otherwise, default is abort
<trackbot> Created ACTION-296 - Define default for
@validationACTION to be warn if @validation is optional;
otherwise, default is abort [on Glenn Adams - due 2014-06-12].
action-254?
<trackbot> action-254 -- Glenn Adams to Add errata note for
ttml1 pointing at constraint in smil prohibiting dur of zero,
add normative text to ttml2 -- due 2014-04-01 -- PENDINGREVIEW
<trackbot>
[11]http://www.w3.org/AudioVideo/TT/tracker/actions/254
[11] http://www.w3.org/AudioVideo/TT/tracker/actions/254
glenn: There's still an action to avoid using 'wilful
violation' wording
close action-254?
<trackbot> Closed action-254.
<glenn> ACTION glenn to soften language about 'willful
violation' regarding treatment of duration zero
<trackbot> Created ACTION-297 - Soften language about 'willful
violation' regarding treatment of duration zero [on Glenn Adams
- due 2014-06-12].
action-284?
<trackbot> action-284 -- Glenn Adams to Create the registry
page -- due 2014-05-01 -- PENDINGREVIEW
<trackbot>
[12]http://www.w3.org/AudioVideo/TT/tracker/actions/284
[12] http://www.w3.org/AudioVideo/TT/tracker/actions/284
close action-284?
<trackbot> Closed action-284.
action-291?
<trackbot> action-291 -- Nigel Megitt to Find the related issue
that describes the need to restrict or extend individual
profile features -- due 2014-05-29 -- PENDINGREVIEW
<trackbot>
[13]http://www.w3.org/AudioVideo/TT/tracker/actions/291
[13] http://www.w3.org/AudioVideo/TT/tracker/actions/291
close action-291
<trackbot> Closed action-291.
Change Proposal 12, Profiles and Features
[14]https://www.w3.org/wiki/TTML/changeProposal012
[14] https://www.w3.org/wiki/TTML/changeProposal012
<glenn>
[15]https://dvcs.w3.org/hg/ttml/raw-file/default/ttml2/design/T
PAC2013-TTMLProfiles.pdf
[15] https://dvcs.w3.org/hg/ttml/raw-file/default/ttml2/design/TPAC2013-TTMLProfiles.pdf
glenn: describes changes made for issues in change proposal 12
by reference to page 8 of the pdf presentation
dsinger: I think combination content profiles inferred within a
document is a mistake and we should only have the OR expression
not the AND, i.e. those wishing to use an alternate profile
should define it separately.
glenn: There are multiple uses of this, either externally in
defining a profile and within a specific document for 'on the
fly' processing.
dsinger: It's the second of those, the 'on the fly' that I
think is a mistake.
glenn: We should think about that some more and think about if
we want to make it asymmetrical, with respect to content
profile combinations as opposed to processor profile
combinations.
nigel: I believe the combination of profiles is described in
issue-206.
glenn: I think david's raising a new issue
<Dsinger_> Issue-206
<trackbot> Issue-206 -- Add ttp:profileCombination parameter --
pending review
<trackbot>
[16]http://www.w3.org/AudioVideo/TT/tracker/issues/206
[16] http://www.w3.org/AudioVideo/TT/tracker/issues/206
glenn: It's that the complexity of supporting on the fly
combination of content profiles is too complex and not needed.
... I've added two editors notes, the second it in 5.2.4.2 that
describes the content profile combination semantics
... If a receiving processor is able to do validation and it's
required then it would use the content profiles otherwise
there's no other use for content profiles. If we define
validation processing well even in the context of content
profiles then that leaves the judgement of complexity to the
reader.
... I would like to propose that we discuss profiles further at
the upcoming F2F in September, and that I write some
explanatory documentation, both in the spec and for the
meeting.
close issue-206
<trackbot> Closed issue-206.
issue-261?
<trackbot> issue-261 -- signaling document profile conformance
is separate from decoder presentation requirements -- pending
review
<trackbot>
[17]http://www.w3.org/AudioVideo/TT/tracker/issues/261
[17] http://www.w3.org/AudioVideo/TT/tracker/issues/261
close issue-261
<trackbot> Closed issue-261.
issue-266?
<trackbot> issue-266 -- add ability for instance documents to
declare what profile(s) it conforms to -- pending review
<trackbot>
[18]http://www.w3.org/AudioVideo/TT/tracker/issues/266
[18] http://www.w3.org/AudioVideo/TT/tracker/issues/266
close issue-266
<trackbot> Closed issue-266.
issue-280?
<trackbot> issue-280 -- Add ability to define a profile from
multiple profiles. -- pending review
<trackbot>
[19]http://www.w3.org/AudioVideo/TT/tracker/issues/280
[19] http://www.w3.org/AudioVideo/TT/tracker/issues/280
close issue-280
<trackbot> Closed issue-280.
issue-263?
<trackbot> issue-263 -- profile feature set may not match
intended feature constraints -- pending review
<trackbot>
[20]http://www.w3.org/AudioVideo/TT/tracker/issues/263
[20] http://www.w3.org/AudioVideo/TT/tracker/issues/263
glenn: ttp:feature can now be specified with either an extends
or a restricts (or both, currently) attribute.
<glenn> action glenn to either proscribe or define semantics on
specifying both @extends and @restricts on a
ttp:{feature,ext3ension}
<trackbot> Created ACTION-298 - Either proscribe or define
semantics on specifying both @extends and @restricts on a
ttp:{feature,ext3ension} [on Glenn Adams - due 2014-06-12].
<glenn> dsinger: mea culpa
nigel: an example for this may be extending or restricting
permitted values e.g. for the tts:color attribute.
glenn: ttp:permitFeatureNarrowing and ttp:permitFeatureWidening
are attributes that describe whether or not processors that
implement narrower/wider versions to claim support.
... It's not predictable what the author wants so I added the
attributes to cover those cases specifically.
nigel: Can we leave that open until there are some examples
e.g. SDP-US color space.
issue-299?
<trackbot> issue-299 -- dur must be greater than zero --
pending review
<trackbot>
[21]http://www.w3.org/AudioVideo/TT/tracker/issues/299
[21] http://www.w3.org/AudioVideo/TT/tracker/issues/299
close issue-299
<trackbot> Closed issue-299.
Pending Review Issues
issue-318?
<trackbot> issue-318 -- Hypothetical Render Model glyph copy
assumes no sub-pixel positioning -- pending review
<trackbot>
[22]http://www.w3.org/AudioVideo/TT/tracker/issues/318
[22] http://www.w3.org/AudioVideo/TT/tracker/issues/318
close issue-318
<trackbot> Closed issue-318.
issue-320?
<trackbot> issue-320 -- Is normative SMPTE 2052 reference okay?
-- pending review
<trackbot>
[23]http://www.w3.org/AudioVideo/TT/tracker/issues/320
[23] http://www.w3.org/AudioVideo/TT/tracker/issues/320
close issue-320
<trackbot> Closed issue-320.
AOB
nigel: I will send regrets for 26th June and 3rd July
Summary of Action Items
[End of minutes]
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Received on Thursday, 5 June 2014 15:10:13 UTC