{agenda} HTML WG media telecon 2013-03-19 - MSE bug discussion and liaison questions from Paul Cotton on 2013-03-15 (public-html-media@w3.org from March 2013)

From: Paul Cotton <Paul.Cotton@microsoft.com>
Date: Fri, 15 Mar 2013 13:43:02 +0000
To: "public-html-media@w3.org" <public-html-media@w3.org>
CC: Jon Piesing <Jon.Piesing@tpvision.com>, Giuseppe Pascale <giuseppep@opera.com>, "Aaron Colwell <acolwell@google.com> (acolwell@google.com)" <acolwell@google.com>, Adrian Bateman <adrianba@microsoft.com>, Mark Watson <watsonm@netflix.com>
Message-ID: <AB5704B0EEC35B4691114DC04366B37F202E2048@TK5EX14MBXC295.redmond.corp.microsoft.>
The HTML WG media teleconference meeting will occur on 2013-03-19 for up to 60 minutes from 15:00Z to 16:00Z.



http://timeanddate.com/s/2c86



Beijing 23:00, Tokyo midnight, Amsterdam/Oslo 16:00, London/Dublin 15:00, New Jersey/York 11:00, Kansas City 10:00, Seattle/San Francisco 08:00.



Chair of the meeting: Paul Cotton

Scribe: TBD



(See the end of this email for dial-in and IRC info.)



== Agenda ==



1. Roll call, introductions and selection of scribe



2. Previous meeting minutes

http://www.w3.org/2013/03/05-html-media-minutes.html



3. Review of action items

https://www.w3.org/html/wg/media/track/

None.



4. Baseline documents



a) Media Source Extensions editor's draft:

http://dvcs.w3.org/hg/html-media/raw-file/tip/media-source/media-source.html

Status as of Mar 15:  Last updated on Mar 12:

http://lists.w3.org/Archives/Public/public-html-media/2013Mar/0037.html



5. Discussion of outstanding bugs



a) Media Source Extensions bugs:

http://tinyurl.com/6pdnzej

Status as of Mar 4: 8 bugs (see list at end of agenda)



6.  MSE Liaison questions and new bugs



a) MSE questions from Open IPTV Forum, HbbTV and the UK DTG

http://lists.w3.org/Archives/Public/public-html-media/2013Mar/0039.html



Q1. Are there plans for test cases for MSE?



Q2. Do you believe MSE contains the features needed for a DASH player that fully supports the DASH profiles defined by MPEG and by DASH-IF? If a DASH player on top of MSE could only support a subset of these profiles, is there any information on what could not be supported?



Q3. Has any thought gone into how MSE could be used with a media element whose playback rate was other than 0 or 1? Particularly rates greater than 1 or less than 0.



Q4. In section 8, it says;



>The combination of an initialization segment and any contiguous sequence of media segments associated with it must:

..

>If a track is encrypted, provide any encryption parameters necessary to

>decrypt the content (except the encryption key itself)



Is there a complete description for the handling of encrypted content with an embedded DRM?



Q5. The broadcasters in our 3 organisations have a requirement to know when a particular advert starts being played and stops being played so that they can report this information back to an advertising server. It seems to us that the (only?) way to achieve this with with MSE is to remember a) where in the timeline the advert has been inserted (as defined by timestampOffset) and b) the length of the advert. As the content is played, the app would poll the currentTime property of the media element and test if this was within an advert. Is this how you would expect this requirement to be met with MSE?



b) MSE Liaison bugs



i.  Bug 21298 - making it easier for people to understand MSE

https://www.w3.org/Bugs/Public/show_bug.cgi?id=21298



ii. Bug 21299 - memory management in MSE

https://www.w3.org/Bugs/Public/show_bug.cgi?id=21299



iii. Bug 21300 - lack of clarity around appendStream

https://www.w3.org/Bugs/Public/show_bug.cgi?id=21300



iv. Bug 21301 - timelines in MSE and HTML5

https://www.w3.org/Bugs/Public/show_bug.cgi?id=21301



v. Bug 21302 - Support for inserting adverts as non-fragmented MP4 files

https://www.w3.org/Bugs/Public/show_bug.cgi?id=21302



7. Other Business



8. Chair and Scribe for next meeting



9. Adjournment



== Dial-in and IRC Details ==



Zakim teleconference bridge:

   +1.617.761.6200, conference 63342 ("media")

https://www.w3.org/Guide/1998/08/teleconference-calendar#s_5366



Supplementary IRC chat (logged):

   #html-media on irc.w3.org port 6665 or port 80


ID▲<https://www.w3.org/Bugs/Public/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&component=Media%20Source%20Extensions&list_id=6256&product=HTML%20WG&query_format=advanced&order=bug_id%20DESC&query_based_on=>

Product<https://www.w3.org/Bugs/Public/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&component=Media%20Source%20Extensions&list_id=6256&product=HTML%20WG&query_format=advanced&order=product%2Cbug_id&query_based_on=>

Comp<https://www.w3.org/Bugs/Public/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&component=Media%20Source%20Extensions&list_id=6256&product=HTML%20WG&query_format=advanced&order=component%2Cbug_id&query_based_on=>

Assignee<https://www.w3.org/Bugs/Public/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&component=Media%20Source%20Extensions&list_id=6256&product=HTML%20WG&query_format=advanced&order=assigned_to%2Cbug_id&query_based_on=>

Status<https://www.w3.org/Bugs/Public/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&component=Media%20Source%20Extensions&list_id=6256&product=HTML%20WG&query_format=advanced&order=bug_status%2Cbug_id&query_based_on=>

Resolution<https://www.w3.org/Bugs/Public/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&component=Media%20Source%20Extensions&list_id=6256&product=HTML%20WG&query_format=advanced&order=resolution%2Cbug_id&query_based_on=>

Summary<https://www.w3.org/Bugs/Public/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&component=Media%20Source%20Extensions&list_id=6256&product=HTML%20WG&query_format=advanced&order=short_desc%2Cbug_id&query_based_on=>

Changed<https://www.w3.org/Bugs/Public/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&component=Media%20Source%20Extensions&list_id=6256&product=HTML%20WG&query_format=advanced&order=changeddate%2Cbug_id&query_based_on=>

20714<https://www.w3.org/Bugs/Public/show_bug.cgi?id=20714>

HTML WG

Media So

adrianba@microsoft.com

NEW

---

timestampOffset in live case <https://www.w3.org/Bugs/Public/show_bug.cgi?id=20714>

Tue 22:01

20760<https://www.w3.org/Bugs/Public/show_bug.cgi?id=20760>

HTML WG

Media So

adrianba@microsoft.com

NEW

---

<video> Expose statistics for tracking playback quality <https://www.w3.org/Bugs/Public/show_bug.cgi?id=20760>

2013-01-29

21276<https://www.w3.org/Bugs/Public/show_bug.cgi?id=21276>

HTML WG

Media So

adrianba@microsoft.com

NEW

---

Some instances of throwing append error should call endOfStream <https://www.w3.org/Bugs/Public/show_bug.cgi?id=21276>

Wed 21:08

21298<https://www.w3.org/Bugs/Public/show_bug.cgi?id=21298>

HTML WG

Media So

adrianba@microsoft.com

NEW

---

making it easier for people to understand MSE <https://www.w3.org/Bugs/Public/show_bug.cgi?id=21298>

08:27:09

21299<https://www.w3.org/Bugs/Public/show_bug.cgi?id=21299>

HTML WG

Media So

adrianba@microsoft.com

NEW

---

memory management in MSE <https://www.w3.org/Bugs/Public/show_bug.cgi?id=21299>

08:33:58

21300<https://www.w3.org/Bugs/Public/show_bug.cgi?id=21300>

HTML WG

Media So

adrianba@microsoft.com

NEW

---

lack of clarity around appendStream <https://www.w3.org/Bugs/Public/show_bug.cgi?id=21300>

08:39:58

21301<https://www.w3.org/Bugs/Public/show_bug.cgi?id=21301>

HTML WG

Media So

adrianba@microsoft.com

NEW

---

timelines in MSE and HTML5 <https://www.w3.org/Bugs/Public/show_bug.cgi?id=21301>

08:43:39

21302<https://www.w3.org/Bugs/Public/show_bug.cgi?id=21302>

HTML WG

Media So

adrianba@microsoft.com

NEW

---

Support for inserting adverts as non-fragmented MP4 files <https://www.w3.org/Bugs/Public/show_bug.cgi?id=21302>

08:58:24

8 bugs found.

Paul Cotton, Microsoft Canada
17 Eleanor Drive, Ottawa, Ontario K2E 6A3
Tel: (425) 705-9596 Fax: (425) 936-7329
Received on Friday, 15 March 2013 13:44:08 UTC