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Re: [MEDIA_PIPELINE_TF] minutes - 25 August 2011

From: Kazuyuki Ashimura <ashimura@w3.org>
Date: Fri, 26 Aug 2011 01:48:36 +0900
Message-ID: <4E567CE4.60903@w3.org>
To: public-web-and-tv@w3.org
FYI, I've just notice a message posted by Rob Manson [a] on who is doing
what with regards to accessing audio and video streams, and think it
might be somewhat useful for the MPTF discussion.

[a] http://lists.w3.org/Archives/Public/public-device-apis/2011Jul/0112.html

Thanks,

Kazuyuki



On 08/26/2011 01:38 AM, Kazuyuki Ashimura wrote:
> available at:
> http://www.w3.org/2011/08/25-webtv-minutes.html
>
> also as text below.
>
> Kazuyuki
>
> ---
> [1]W3C
>
> [1] http://www.w3.org/
>
> - DRAFT -
>
> Media Pipeline Task Force Teleconference
>
> 25 Aug 2011
>
> [2]Agenda
>
> [2] http://www.w3.org/2011/webtv/wiki/MPTF/Agenda_Telco_25th_August_2011
>
> See also: [3]IRC log
>
> [3] http://www.w3.org/2011/08/25-webtv-irc
>
> Attendees
>
> Present
> Kazuyuki, davidmays_JanL, Clarke, Bob, gondo, Russell,
> duncanr, Giuseppe, Steven, Mark_Vickers, aizu, igarashi,
> Mark_Watson, Juhani
>
> Regrets
> Chair
> Clarke
>
> Scribe
> kaz
>
> Contents
>
> * [4]Topics
> 1. [5]f2f
> 2. [6]issue review
> * [7]Summary of Action Items
> _________________________________________________________
>
> f2f
>
> clarke: anything to add?
> ... comments on the ML is welcome
>
> issue review
>
> clarke: any questions?
>
> (nop)
>
> issue-44?
>
> <trackbot> ISSUE-44 -- Continuous Streaming by Continuous Playlist
> -- raised
>
> <trackbot> [8]http://www.w3.org/2011/webtv/track/issues/44
>
> [8] http://www.w3.org/2011/webtv/track/issues/44
>
> <Clarke> issue 44:
> [9]http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Continuou
> s_Streaming_2'
>
> [9] http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Continuous_Streaming_2'
>
> ->
> [10]http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Continuo
> us_Streaming_2 issue-44
>
> [10] http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Continuous_Streaming_2
>
> clarke: any comments?
>
> Mark Vickers joined
>
> clarke: 44 is playlist
>
> <scribe> ACTION: clarke to change the title of issue-44 from
> "continuous streaming 2" to "playlist" [recorded in
> [11]http://www.w3.org/2011/08/25-webtv-minutes.html#action01]
>
> <trackbot> Created ACTION-73 - Change the title of issue-44 from
> "continuous streaming 2" to "playlist" [on Clarke Stevens - due
> 2011-09-01].
>
> bob: live streaming is supported by HTML5
> ... I'll add dependency
>
> issue-45?
>
> <trackbot> ISSUE-45 -- Time Synchronization (continuous stream) --
> raised
>
> <trackbot> [12]http://www.w3.org/2011/webtv/track/issues/45
>
> [12] http://www.w3.org/2011/webtv/track/issues/45
>
> clarke: time synchronization
> ... not sure a use case for MPTF
>
> ->
> [13]http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Time_Syn
> chronization issue-45
>
> [13] http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Time_Synchronization
>
> issue-46?
>
> <trackbot> ISSUE-46 -- Program Boundary Identification in Continuous
> Streams -- raised
>
> <trackbot> [14]http://www.w3.org/2011/webtv/track/issues/46
>
> [14] http://www.w3.org/2011/webtv/track/issues/46
>
> clarke: program boundary
>
> ->
> [15]http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Program_
> Boundary issue-46
>
> [15] http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Program_Boundary
>
> clarke: comments/additions?
>
> bob: pointed out last week is timed text track mechanism
>
> clarke: will add a note
> ... any other comments?
>
> (nop)
>
> issue-37?
>
> <trackbot> ISSUE-37 -- View-Port support for Video Window -- raised
>
> <trackbot> [16]http://www.w3.org/2011/webtv/track/issues/37
>
> [16] http://www.w3.org/2011/webtv/track/issues/37
>
> <Clarke> [17]issue-37
>
> [17] http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/ViewPort-Support
>
> clarke: are we ready to accept this?
>
> <igarashi> zakim p7 is igarashi
>
> clarke: couple ways for us to consider this
> ... suggest we go ahead and accept this
> ... any comments?
>
> (nop)
>
> RESOLUTION: accept issue-37
>
> issue-45?
>
> <trackbot> ISSUE-45 -- Time Synchronization (continuous stream) --
> raised
>
> <trackbot> [18]http://www.w3.org/2011/webtv/track/issues/45
>
> [18] http://www.w3.org/2011/webtv/track/issues/45
>
> jan: would remove "This is not yet a real use case." :)
>
> ->
> [19]http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Time_Syn
> chronization issue-45
>
> [19] http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Time_Synchronization
>
> jan: not sure how to phrase this
> ... in a continuous stream what is the semantics of video tags
> ... text under bullet "1" is good description
>
> clarke: ok
> ... next is content protection (issue-39)
>
> issue-39?
>
> <trackbot> ISSUE-39 -- TV Services and Media Transport Mapping --
> raised
>
> <trackbot> [20]http://www.w3.org/2011/webtv/track/issues/39
>
> [20] http://www.w3.org/2011/webtv/track/issues/39
>
> <Clarke> Issue:
> [21]http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/TV_servi
> ces_transport_mapping
>
> [21] http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/TV_services_transport_mapping
>
> <trackbot> Created ISSUE-47 -
> Http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/TV_services_
> transport_mapping ; please complete additional details at
> [22]http://www.w3.org/2011/webtv/track/issues/47/edit .
>
> [22] http://www.w3.org/2011/webtv/track/issues/47/edit
>
> ->
> [23]http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/TV_servi
> ces_transport_mapping issue-39
>
> [23] http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/TV_services_transport_mapping
>
> bob: how UAs identify audio tracks
> ... type of media stream, e.g., MPEG2 TS, MPEG4 ISOBMFF, DASH
> ... DOM API specified
> ... the use case is in-band track types
> ... will update the use case
>
> clarke: topic for f2f
>
> bob: will commit before the f2f
>
> clarke: any other comments?
>
> (nop)
>
> jan: 45 is updated
>
> issue-40
>
> issue-40?
>
> <trackbot> ISSUE-40 -- Content delivery in distribution windows --
> raised
>
> <trackbot> [24]http://www.w3.org/2011/webtv/track/issues/40
>
> [24] http://www.w3.org/2011/webtv/track/issues/40
>
> ->
> [25]http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Delivery
> _in_distribution_windows issue-40
>
> [25] http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Delivery_in_distribution_windows
>
> bob: content protection discussion
> ... more objective space
> ... from Cable industry perspective, content owners are going to
> require for content protection
> ... delivery windows
> ... use case is commercial content delivery
>
> clarke: just on definition
>
> bob: traditional definition
> ... could be captured within some of the other my use cases
>
> jan: distribution window is DRM perspective
>
> bob: motivation here is content owner has demand
>
> clarke: a specific Web page linked to DRM?
>
> bob: number of implication I have to address
> ... how HTML5 UA should support this
> ... business/commercial need should be addressed
>
> kaz: good topic for workshop as well
>
> clarke: bob submitted this topic to the workshp
>
> bob: my paper covers this
>
> kaz: will talk with the PC guys and suggest we talk about this
> during the ws
>
> juhani: question about issue-40, etc.
> ... what to standardize?
> ... interested in content security technical requirement
>
> bob: will put that into the use case
> ... also mention what needs to be standardized
>
> juhani: ok
>
> issue-41?
>
> <trackbot> ISSUE-41 -- Support of Content Owner Property Rights --
> raised
>
> <trackbot> [26]http://www.w3.org/2011/webtv/track/issues/41
>
> [26] http://www.w3.org/2011/webtv/track/issues/41
>
> ->
> [27]http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Content_
> owner_rights issue-41
>
> [27] http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Content_owner_rights
>
> bob: required by UltraViolet or DECE
> ... DECE has specific technical requirements
> ... consumer contents
>
> <JanL> +q
>
> bob: we'd like to cover DECE's requirements
>
> clarke: ok
>
> <JanL> -q
>
> jan: the link in the use case is broken
> ... "Common content security technical requirements."
>
> igarashi: my assumption is HTML just render
>
> <Clarke> Here's a link to the common content protection
> requirements:
> [28]http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Delivery
> _in_distribution_windows/Common_content_secuirty_requirements
>
> [28] http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Delivery_in_distribution_windows/Common_content_secuirty_requirements
>
> igarashi: no consideration on this kind of offline processing?
>
> bob: good point
> ... the case of downloading content case
> ... streaming is most relevant for HTML5
> ... good observation to think about both streaming and downloading
>
> igarashi: good to see both the cases
> ... there are technical differences
>
> bob: agree
>
> clarke: the correct URL for the broken link of "Common content
> security technical requirements." is
> [29]http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Delivery
> _in_distribution_windows/Common_content_secuirty_requirements
>
> [29] http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Delivery_in_distribution_windows/Common_content_secuirty_requirements
>
> issue-42?
>
> <trackbot> ISSUE-42 -- Content delivery to personal computers --
> raised
>
> <trackbot> [30]http://www.w3.org/2011/webtv/track/issues/42
>
> [30] http://www.w3.org/2011/webtv/track/issues/42
>
> ->
> [31]http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Delivery
> _to_pc issue-42
>
> [31] http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Delivery_to_pc
>
> bob: both aspects are important
> ... An off-the-shelf browser such as Chrome, Firefox, Internet
> Explorer, Opera or Safari.
> ... and An application incorporating a browser downloaded from a
> service provider.
>
> issue-43?
>
> <trackbot> ISSUE-43 -- Content delivery to retail consumer
> electronics devices -- raised
>
> <trackbot> [32]http://www.w3.org/2011/webtv/track/issues/43
>
> [32] http://www.w3.org/2011/webtv/track/issues/43
>
> ->
> [33]http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Delivery
> _to_ce issue-43
>
> [33] http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Delivery_to_ce
>
> bob: retail consumer electronics device with an embedded application
> ... more specialized
> ... (explains motivation)
>
> davidmays: HTML5 UA should identify what content protection
> capabilities they have so that applications can present appropriate
> content based on that level of protection capability
>
> bob: 1st one is general web delivery
> ... then content protection
> ... content protection is good or bad
>
> <davidmays> HTML5 UA should identify what content protection
> capabilities they have so that applications can present appropriate
> content based on that level of protection capability
>
> giuseppe: what if browsers are not shipped with DRM capability?
>
> juhani: I'm for the requirements
> ... DRM support should be useful
> ... how to solve this problem should be defined
>
> bob: plugins can be used by UAs for that purpose
> ... however, there is a link
>
> <giuseppe> kaz is mark watson
>
> giuseppe: plugin for DRM is wrong point to start...
> ... do you need fall-back mechanism?
> ... video element itself is not aware if plugins handle it
>
> bob: we use video element for content protection
> ... existing video tag provides the capability
>
> giuseppe: video tag itself handles rendering, not necessarily aware
> of content protection
>
> jan: how do we recommend extending video tag's capability itself
> ... good topic for the workshop
>
> giuseppe: if you want to standardize, need to consider who does what
>
> clarke: we'll continue the discussion next week
>
> <Clarke> thanks, kaz
>
> thanks, Clarke!
>
> <Clarke> -Clarke
>
> <Russell_Berkoff> thanks
>
> Summary of Action Items
>
> [NEW] ACTION: clarke to change the title of issue-44 from
> "continuous streaming 2" to "playlist" [recorded in
> [34]http://www.w3.org/2011/08/25-webtv-minutes.html#action01]
>
> [End of minutes]
> _________________________________________________________
>
>
> Minutes formatted by David Booth's [35]scribe.perl version 1.136
> ([36]CVS log)
> $Date: 2011/08/25 16:21:49 $
>
> [35] http://dev.w3.org/cvsweb/~checkout~/2002/scribe/scribedoc.htm
> [36] http://dev.w3.org/cvsweb/2002/scribe/
>
>

-- 
Kaz Ashimura, W3C Staff Contact for Web&TV, MMI and Voice
Tel: +81 466 49 1170
Received on Thursday, 25 August 2011 16:48:28 UTC

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