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[MEDIA_PIPELINE_TF] minutes - 25 August 2011

From: Kazuyuki Ashimura <ashimura@w3.org>
Date: Fri, 26 Aug 2011 01:38:40 +0900
Message-ID: <4E567A90.20700@w3.org>
To: public-web-and-tv@w3.org
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]
      _________________________________________________________


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Received on Thursday, 25 August 2011 16:38:33 UTC

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