- From: Matt Womer <mdw@w3.org>
- Date: Tue, 14 Aug 2012 12:05:15 -0400
- To: public-html-media@w3.org
HI all,
Minutes for today's teleconference are here:
http://www.w3.org/2012/08/14-html-media-minutes
And as text below.
It was a pleasure to meet you all, and I look forward to working with you.
-Matt Womer
W3C/MIT Staff
--
[1]W3C
[1] http://www.w3.org/
- DRAFT -
HTML Media Task Force Teleconference
14 Aug 2012
[2]Agenda
[2] http://lists.w3.org/Archives/Public/public-html-media/2012Aug/0006.html
See also: [3]IRC log
[3] http://www.w3.org/2012/08/14-html-media-irc
Attendees
Present
+1.425.888.aaaa, Clarke, NiXu, acolwell, matt,
+1.310.210.aabb, +1.415.867.aacc, adrianba, ddorwin,
markw, paulc, +1.303.661.aadd, BobLund, pal_,
Mark_Vickers
Regrets
Chair
paulc
Scribe
Matt
Contents
* [4]Topics
1. [5]Roll call
2. [6]Previous minutes
3. [7]Review Actions
4. [8]Baseline documents and Bugzilla information
5. [9]Actions from the previous meetings
6. [10]New Bugs
7. [11]Actions from previous meeting
8. [12]Candidate Media Source Extension bugs for
discussion
9. [13]Any other business?
* [14]Summary of Action Items
__________________________________________________________
<trackbot> Date: 14 August 2012
<scribe> Scribe: Matt
<Johnsim> zakim aagg is me
<Johnsim> zakim aaaa is me
Roll call
matt: Hi, I'm Matt. I'll be helping out as part of the work on
Web and TV. I'm at MIT, so I'm on East Coast time.
Previous minutes
paulc: No comments on those.
->
[15]http://lists.w3.org/Archives/Public/public-html-media/2012J
ul/0096.html Previous Minutes
[15] http://lists.w3.org/Archives/Public/public-html-media/2012Jul/0096.html
Review Actions
paulc: There weren't any in tracker, but there were some
informal ones that I put in the agenda.
Baseline documents and Bugzilla information
->
[16]http://dvcs.w3.org/hg/html-media/raw-file/tip/media-source/
media-source.html Draft
[16] http://dvcs.w3.org/hg/html-media/raw-file/tip/media-source/media-source.html
->
&bug_id=&votes=&chfieldfrom=&chfieldto=Now&chfieldvalue=&cmdtyp
e=doit&order=Reuse+same+sort+as+last+time&field0-0-0=noop&type0
-0-0=noop&value0-0-0= Bugzilla
Actions from the previous meetings
<paulc>
[17]http://lists.w3.org/Archives/Public/public-html-media/2012A
ug/0003.html
[17] http://lists.w3.org/Archives/Public/public-html-media/2012Aug/0003.html
->
[18]http://lists.w3.org/Archives/Public/public-html-media/2012J
ul/0003.html
[18] http://lists.w3.org/Archives/Public/public-html-media/2012Jul/0003.html
/
Aaron?: I don't think there's anything to talk about they're
done.
paulc: Bug 17739 and Bug 18389 are resolved
-> [19]https://www.w3.org/Bugs/Public/show_bug.cgi?id=18389 Bug
18389
[19] https://www.w3.org/Bugs/Public/show_bug.cgi?id=18389
<acolwell>
[20]https://www.w3.org/Bugs/Public/show_bug.cgi?id=18550
[20] https://www.w3.org/Bugs/Public/show_bug.cgi?id=18550
New Bugs
paulc: The new bugs in item six are in the encrypted media
group and I'll deal with those at the next meeting.
... Both of them?
<paulc> Note that bugs 18515 and 18531 are both EME bugs
-> [21]https://www.w3.org/Bugs/Public/show_bug.cgi?id=18550 New
bug
[21] https://www.w3.org/Bugs/Public/show_bug.cgi?id=18550
acolwell: Provides a definition for TrackID
paulc: Does that propose a solution?
Aaron: Just need to figure out the text to put in there.
paulc: Timetable?
Aaron: Next call.
INFORMAL ACTION: acolwell to propose a solution for 18550
before next meeting
Actions from previous meeting
-> [22]https://www.w3.org/Bugs/Public/show_bug.cgi?id=18400 Bug
18400
[22] https://www.w3.org/Bugs/Public/show_bug.cgi?id=18400
paulc: Previous notes said markw will address by this call.
markw: I posted a proposal to the bug, they were descriptive
rather than text proposals. No comments yet, so next step is
text proposal.
... One question: sometimes you don't know where the media ends
in a segment that has been appended. This can happen in a video
with subtitles, there's a subtitle between 5s and 10s, but then
you don't know which portion is addressed by that segment.
... If you have the exact information about how the timeline is
covered, then you don't need that feature. There's a case of
the mp4 format ??? despite having the span, that information is
made available to the application.
<markw> regarding the mp4 format, the information about the end
of the segment not in the segment, but is in the segment index
<paulc> Aaron responded in
[23]https://www.w3.org/Bugs/Public/show_bug.cgi?id=18400#c4
[23] https://www.w3.org/Bugs/Public/show_bug.cgi?id=18400#c4
acolwell: For the most part I agree with Mark on his proposal.
There's only one section that doesn't get to how long the
segment is and causes a problem. Should we mandate that media
segments have some form of duration information in them?
... I think that might be what markw was advocating, or at
least in ISO you already know it.
... If we require the duration, then we need to change the WebM
text as it's not required there.
markw: The information isn't there itself but it's available to
the application. You could imagine adding to the API that that
information is added when you append.
paulc: Next step?
INFORMAL ACTION: markw to reply to Aaron's response to bug
18400 comment 4 by next meeting
-> [24]https://www.w3.org/Bugs/Public/show_bug.cgi?id=17001 Bug
17001
[24] https://www.w3.org/Bugs/Public/show_bug.cgi?id=17001
paulc: Any action on this?
<paulc> Bob's response is here:
[25]https://www.w3.org/Bugs/Public/show_bug.cgi?id=17001#c1
[25] https://www.w3.org/Bugs/Public/show_bug.cgi?id=17001#c1
acolwell: I did contact Bob, didn't CC list. He had commented
back that he was okay with the changes. So I closed the bug.
RESOLUTION: bug 17001 (
[26]https://www.w3.org/Bugs/Public/show_bug.cgi?id=17001) FIXED
[26] https://www.w3.org/Bugs/Public/show_bug.cgi?id=17001)
-> [27]https://www.w3.org/Bugs/Public/show_bug.cgi?id=17000 Bug
17000
[27] https://www.w3.org/Bugs/Public/show_bug.cgi?id=17000
adrianba: We haven't worked on this, the encrypted work is a
higher priority.
INFORMAL ACTION: adrianba and Johnsim to look at bug 17000
before next meeting.
-> [28]https://www.w3.org/Bugs/Public/show_bug.cgi?id=17002 Bug
17002
[28] https://www.w3.org/Bugs/Public/show_bug.cgi?id=17002
paulc: On this one we were trying to decide to close this bug
and make a new one, adrianba said we should retitle it.
acolwell said he'd look at the history.
acolwell: I retitled the bug and added a comment.
<acolwell>
[29]https://www.w3.org/Bugs/Public/show_bug.cgi?id=17002#c7
[29] https://www.w3.org/Bugs/Public/show_bug.cgi?id=17002#c7
<paulc> New title: Specify a mechanism to determine which
SourceBuffer an AudioTrack,VideoTrack, or TextTrack belong to.
acolwell: Also posted a message to the list to ask for people
to look at it.
->
[30]http://lists.w3.org/Archives/Public/public-html-media/2012A
ug/0008.html acolwell mail on updated bug 17002
[30] http://lists.w3.org/Archives/Public/public-html-media/2012Aug/0008.html
paulc: Anyone have comments on this now?
... It would help if people would indicate support. Please
don't think you only have to respond in the negative.
-> [31]https://www.w3.org/Bugs/Public/show_bug.cgi?id=17006 Bug
17006
[31] https://www.w3.org/Bugs/Public/show_bug.cgi?id=17006
acolwell: This goes back to the DASH spec, and this asks what
level of support do we want. DASH allows language and kind to
be set on each different track. Depending on how you allow
this, you could have track language change mid playback.
... It needs to be scoped a bit better for where it is allowed
to be changed.
markw: What scenarios do you think those properties would
change in DASH?
acolwell: language and role (which is kind in HTML) that could
be applied to both adaptation-set? and component? Seems like
you could have multiple ?? in a adaptation-set.
markw: Those are required to have the same properties at the
??adaptation?? level.
... If you had a adaptation set with three in it, all three
would have the same values.
acolwell: I need to start a thread to discuss this. When I
looked at the mpeg spec, it looked like there could be
trickiness involved.
INFORMAL ACTION: acolwell to start a thread on bug 17006
<markw> the trickiness is that a single source buffer can map
to multiple HTML track if the media is multiplexed
BobLund: The media component would provide an override and if
you had a component that each would -- if you had an mpg2
transport with mp3, etc, and each would map into audio, video
and text track.
acolwell: Do you need to be able to update each track's kind
and language or groups of these? Is it at source buffer level
or track level?
BobLund: I don't know if there's anything in the DASH spec that
would prohibit that. We've talked about ?? and that would be a
new source buffer.
markw: I'm not sure how you could match up the media components
and the multiple tracks provided from a single source buffer.
BobLund: That's another issue actually.
-> [32]https://www.w3.org/Bugs/Public/show_bug.cgi?id=17072 Bug
17072
[32] https://www.w3.org/Bugs/Public/show_bug.cgi?id=17072
paulc: We said at the last meeting that this might not be
relevant.
acolwell: Yes, most of the remaining issues are covered by what
Mark is working on. Closed it, left a comment and pointed
forward to new bug.
paulc: So that one is done.
acolwell: Bug 17072 was marked resolved won't fix.
-> [33]https://www.w3.org/Bugs/Public/show_bug.cgi?id=17094 Bug
17094
[33] https://www.w3.org/Bugs/Public/show_bug.cgi?id=17094
Define segment formats for MPEG2-TS
paulc: acolwell You suggested this might be controversial and
need to talk it out.
acolwell: No progress made. Still pending.
??: I don't know if someone on the call is championing this
one, they might be best to advocate for it.
paulc: This was filed by Duncan from BBC. Not on the call
today.
... I don't see him participating in the dialog at all.
BobLund: I'll volunteer to champion this.
paulc: Perhaps do a PRO/CON list on the list for taking action
on this
BobLund: Will do and will close the loop with Duncan on this.
-> [34]https://www.w3.org/Bugs/Public/show_bug.cgi?id=16998 Bug
16998 Change sourceAppend() to take a URL and optional range
parameters
[34] https://www.w3.org/Bugs/Public/show_bug.cgi?id=16998
paulc: We talked about splitting this bug at the last meeting.
... It wasn't obvious if we'd made progress on that or not.
acolwell: No, I haven't split the bug.
paulc: So this one is still pending.
Candidate Media Source Extension bugs for discussion
paulc: I have a feeling we've touched on all of the bugs in
this discussion.
... So, we've made some real progress here.
Any other business?
paulc: Any other business?
... Matt, will you be scribing future meetings?
matt: Attending, scribing no.
markw: What's the timeline?
paulc: If we can get the bugs closed, there are only 7 still
outstanding, publish and bring it to the group. If we can make
substantive progress over 2 weeks, and assume we don't get them
all closed, then a month from now get the remaining ones.
... That would put us mid-september, and we could put it to the
group then. They should be doing a heartbeat publication then,
and perhaps get us on the same schedule.
... I suspect we'll have to give the WG a few weeks to review
the document.
... But, our first objective is to close this round of bugs.
... The feeling before was that we could move this and EME
forward separately.
... At the other meeting, I predicted a single digit number of
weeks away from going back to the WG. So, I think we're on
schedule, but the bar to get over is to close these last 7
bugs.
... Scribe in two weeks?
<no one>
paulc: Please clean the minutes and send to the media list.
... Adjourned.
s|s///||
s|s/->
[35]http://lists.w3.org/Archives/Public/public-html-media/2012J
ul/0003.html/||
[35] http://lists.w3.org/Archives/Public/public-html-media/2012Jul/0003.html/
s|[36]https://www.w3.org/Bugs/Public/buglist.cgi?query_format=a
dvanced&short_desc_t.*||
[36] https://www.w3.org/Bugs/Public/buglist.cgi?query_format=advanced&short_desc_t.*
Summary of Action Items
[End of minutes]
__________________________________________________________
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Received on Tuesday, 14 August 2012 16:06:40 UTC