13:53:37 <RRSAgent> RRSAgent has joined #tt
13:53:37 <RRSAgent> logging to http://www.w3.org/2012/05/31-tt-irc
13:53:39 <trackbot> RRSAgent, make logs public
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13:53:41 <trackbot> Zakim, this will be TTML
13:53:41 <Zakim> ok, trackbot; I see SYMM_TTWG()10:00AM scheduled to start in 7 minutes
13:53:42 <trackbot> Meeting: Timed Text Working Group Teleconference
13:53:42 <trackbot> Date: 31 May 2012
13:53:55 <glenn> Chair: sean
13:53:59 <glenn> Scribe: glenn
13:54:45 <glenn> Agenda: http://lists.w3.org/Archives/Public/public-tt/2012May/0030.html
13:55:43 <Sean> Sean has joined #tt
13:56:58 <Zakim> SYMM_TTWG()10:00AM has now started
13:57:05 <Zakim> +??P6
13:57:14 <glenn> zakim, ??p6 is glenn
13:57:14 <Zakim> +glenn; got it
13:57:31 <andreas> andreas has joined #tt
13:58:20 <Zakim> + +44.154.558.aaaa
13:58:33 <Zakim> + +49.893.aabb
13:58:35 <glenn> zakim, aaaa is sean
13:58:35 <Zakim> +sean; got it
13:58:43 <glenn> zakim, aabb is andreas
13:58:43 <Zakim> +andreas; got it
13:59:11 <mike> mike has joined #tt
14:00:20 <Zakim> +mike
14:03:53 <glenn> Topic: ISSUE-154
14:03:56 <glenn> ISSUE-154?
14:03:56 <trackbot> ISSUE-154 -- Clarify the endsync behavior -- open
14:03:56 <trackbot> http://www.w3.org/AudioVideo/TT/tracker/issues/154
14:04:11 <Zakim> +Andrew_Kirkpatrick
14:04:38 <Zakim> + +1.617.300.aacc - is perhaps WGBH?
14:08:24 <glenn> sean: with default endsync of last, then parent will finish immediately if no child is activated
14:10:07 <glenn> resolved: change default for endsync to all, to go into 2nd edition
14:10:27 <glenn> glenn: wonders if this is a substantial change and will be an issue or not
14:10:46 <glenn> sean: thinks current text is broken, and this is reasonable change
14:10:58 <glenn> Topic: ISSUE-151
14:11:00 <glenn> ISSUE-151?
14:11:00 <trackbot> ISSUE-151 -- Clarify syncbase in SMPTE continuous mode -- open
14:11:00 <trackbot> http://www.w3.org/AudioVideo/TT/tracker/issues/151
14:13:27 <glenn> glenn: under 10.4, need to break out smpte/continuous to separate bullet
14:14:15 <glenn> andreas: wanted clarification (if needed) that in smpte/continuous, 
14:16:43 <glenn> ... a child's begin (in par context), if expressed as time code, should it be with respect to parent or as marker matching?
14:17:33 <glenn> andreas: regarding time offset expressions, don't think they are currently admitted even for smpte/continuous mode
14:17:49 <glenn> glenn: don't believe that was the intention, so need to double check this
14:17:53 <glenn> sean: agrees
14:18:34 <glenn> mike: spec needs to make clear that smpte time base (whether continuous/discontinuous) needs an external time base
14:18:50 <glenn> ... so may need to add note/text making it clear
14:19:08 <glenn> ... also possibly needs language making definition of epoch clear
14:22:37 <glenn> sean: for 2nd Ed, thinks we should retain distinction continuous/discontinuous, but may be able to remove in 1.1 if we agree to do so
14:23:24 <glenn> glenn: needs to review text to verify whether time offsets are permitted in smpte/continuous, and if not clear, then should add clarifying text
14:23:43 <glenn> mike: there was an issue about default value of markerMode...
14:24:12 <glenn> ... concern is that if an implementation is constrained to support discontinuous only, then content will need to be explicit
14:24:44 <glenn> sean: perhaps we should mandate explicit setting of markerMode in case timeBase is smpte
14:24:58 <glenn> andreas: problems came from confusion of readers
14:25:19 <glenn> mike: forces EBU to use attribute in authoring, but doesn't really want to specify
14:26:07 <glenn> andreas: wants smpte time base to work without having to specify marker mode, since discontinuous seems to be common assumption as default
14:26:17 <glenn> sean: would be happy to accept change
14:27:13 <glenn> glenn: if we change endsync default, then we could change this as well
14:27:48 <glenn> sean: plh will need to make decision
14:28:09 <glenn> ... thinks both changes (to endsync and markerMode defaults) is correcting errors in spec
14:28:25 <glenn> mike: perhaps we should reach out to users/authors to gauge response
14:28:51 <glenn> ... cpc, bbc, ...
14:29:09 <glenn> ... iplayer group at bbc is using
14:29:35 <glenn> sean: will attempt to reach out to community
14:29:45 <glenn> mike: will give us more clear indication
14:30:31 <glenn> ACTION sean to reach out to community to gauge response to a possible change in default behavior for endsync and markerMode
14:30:31 <trackbot> Created ACTION-67 - Reach out to community to gauge response to a possible change in default behavior for endsync and markerMode [on Sean Hayes - due 2012-06-07].
14:31:56 <glenn> sean: expect to make these changes (to default of endsync and markerMode) if there are no objections
14:33:09 <glenn> Topic: CP 001 - add animation to region, multiple elements for single set, can reference style block, allow target for another element
14:33:14 <glenn> http://www.w3.org/wiki/TTML/changeProposal001
14:34:35 <glenn> resolved: to accept CP 001
14:35:19 <glenn> Topic: CP 002 - Adding origin/extent to block level elements
14:35:21 <glenn> http://www.w3.org/wiki/TTML/changeProposal002
14:36:23 <glenn> sean: implementations have supported this on incorrect reading of text
14:36:34 <glenn> ... would need to be done in 1.1
14:37:11 <glenn> ... improves locality of reference, since reduces need to pre-declare regions
14:46:52 <glenn> glenn: has thought about this, and believes a simple mechanism could be defined based on anonymous regions
14:47:14 <glenn> sean: take a look at current CP and update/add
14:47:44 <glenn> mike: wonders about how to apply changes to anonymous region properties, should assist with 708 mapping
14:48:16 <glenn> glenn: should be able to animate (via set) the anonymous region properties by referring to block element itself
14:48:25 <glenn> sean: group should review CP 002
14:49:59 <glenn> Topic: Review Open Actions
14:51:44 <glenn> ACTION-62?
14:51:44 <trackbot> ACTION-62 -- Glenn Adams to search TT member archives for reference to video showing smooth scrolling -- due 2012-04-19 -- OPEN
14:51:44 <trackbot> http://www.w3.org/AudioVideo/TT/tracker/actions/62
14:52:09 <glenn> mike: who/why was this requested?
14:52:29 <glenn> sean: sees that plh has already found the correct reference
14:52:45 <glenn> http://lists.w3.org/Archives/Public/public-tt/2008Dec/0155.html
14:53:26 <glenn> mike: thinks adding an animation to do smooth scroll would not be a good technical solution
14:53:59 <glenn> sean: could put in note indicating that reflow should attempt to move content in a smooth fashion
14:56:31 <glenn> mike: could consider referring to paragraph/text in 608 that would help define semantics
14:57:02 <glenn> ACTION mike to provide reference to 608/708 that defines/clarifies semantics of smooth flowing/scrolling
14:57:02 <trackbot> Sorry, couldn't find user - mike
14:58:31 <glenn> ACTION sean to work with mike to provide reference to 608/708 that defines/clarifies semantics of smooth flowing/scrolling
14:58:31 <trackbot> Created ACTION-68 - Work with mike to provide reference to 608/708 that defines/clarifies semantics of smooth flowing/scrolling [on Sean Hayes - due 2012-06-07].
14:58:51 <glenn> Topic: Adjournment
14:59:06 <glenn> sean: adjourned
14:59:13 <Zakim> -WGBH?
14:59:13 <Zakim> -Andrew_Kirkpatrick
14:59:15 <Zakim> -mike
14:59:15 <Zakim> -andreas
14:59:19 <Zakim> -sean
14:59:28 <glenn> rrsagent, draft minutes
14:59:28 <RRSAgent> I have made the request to generate http://www.w3.org/2012/05/31-tt-minutes.html glenn
14:59:40 <glenn> trackbot, end meeting
14:59:40 <trackbot> Zakim, list attendees
14:59:40 <Zakim> As of this point the attendees have been glenn, +44.154.558.aaaa, +49.893.aabb, sean, andreas, mike, Andrew_Kirkpatrick, +1.617.300.aacc
14:59:48 <trackbot> RRSAgent, please draft minutes
14:59:48 <RRSAgent> I have made the request to generate http://www.w3.org/2012/05/31-tt-minutes.html trackbot
14:59:49 <trackbot> RRSAgent, bye
14:59:49 <RRSAgent> I see no action items