Media Pipeline Task Force Teleconference

25 Aug 2011


See also: IRC log


Kazuyuki, davidmays_JanL, Clarke, Bob, gondo, Russell, duncanr, Giuseppe, Steven, Mark_Vickers, aizu, igarashi, Mark_Watson, Juhani



clarke: anything to add?
... comments on the ML is welcome

issue review

clarke: any questions?



<trackbot> ISSUE-44 -- Continuous Streaming by Continuous Playlist -- raised

<trackbot> http://www.w3.org/2011/webtv/track/issues/44

<Clarke> issue 44: http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Continuous_Streaming_2'

-> http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Continuous_Streaming_2 issue-44

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 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


<trackbot> ISSUE-45 -- Time Synchronization (continuous stream) -- raised

<trackbot> http://www.w3.org/2011/webtv/track/issues/45

clarke: time synchronization
... not sure a use case for MPTF

-> http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Time_Synchronization issue-45


<trackbot> ISSUE-46 -- Program Boundary Identification in Continuous Streams -- raised

<trackbot> http://www.w3.org/2011/webtv/track/issues/46

clarke: program boundary

-> http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Program_Boundary issue-46

clarke: comments/additions?

bob: pointed out last week is timed text track mechanism

clarke: will add a note
... any other comments?



<trackbot> ISSUE-37 -- View-Port support for Video Window -- raised

<trackbot> http://www.w3.org/2011/webtv/track/issues/37

<Clarke> issue-37

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?


RESOLUTION: accept issue-37


<trackbot> ISSUE-45 -- Time Synchronization (continuous stream) -- raised

<trackbot> http://www.w3.org/2011/webtv/track/issues/45

jan: would remove "This is not yet a real use case." :)

-> http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Time_Synchronization issue-45

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)


<trackbot> ISSUE-39 -- TV Services and Media Transport Mapping -- raised

<trackbot> http://www.w3.org/2011/webtv/track/issues/39

<Clarke> Issue: 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 http://www.w3.org/2011/webtv/track/issues/47/edit .

-> http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/TV_services_transport_mapping issue-39

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?


jan: 45 is updated



<trackbot> ISSUE-40 -- Content delivery in distribution windows -- raised

<trackbot> http://www.w3.org/2011/webtv/track/issues/40

-> http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Delivery_in_distribution_windows issue-40

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


<trackbot> ISSUE-41 -- Support of Content Owner Property Rights -- raised

<trackbot> http://www.w3.org/2011/webtv/track/issues/41

-> http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Content_owner_rights issue-41

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: 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 http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Delivery_in_distribution_windows/Common_content_secuirty_requirements


<trackbot> ISSUE-42 -- Content delivery to personal computers -- raised

<trackbot> http://www.w3.org/2011/webtv/track/issues/42

-> http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Delivery_to_pc issue-42

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.


<trackbot> ISSUE-43 -- Content delivery to retail consumer electronics devices -- raised

<trackbot> http://www.w3.org/2011/webtv/track/issues/43

-> http://www.w3.org/2011/webtv/wiki/MPTF/MPTF_Discussions/Delivery_to_ce issue-43

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 http://www.w3.org/2011/08/25-webtv-minutes.html#action01]
[End of minutes]

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$Date: 2011/08/25 16:21:49 $