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Re: HTML WG media discussion: Alternate content insertion use cases

From: Ingar Mæhlum Arntzen <ingar.arntzen@gmail.com>
Date: Thu, 7 May 2015 12:05:50 +0200
Message-ID: <CAOFBLLqbKh0kb0W2p8N11TUJBCsb9KCcFpwSL2W64Q5hK8=DWQ@mail.gmail.com>
To: Daniel Davis <ddavis@w3.org>
Cc: "public-web-and-tv@w3.org" <public-web-and-tv@w3.org>, public-webtiming@w3.org
Hi Daniel

A brief look at the minutes indicates that this is highly relevant for the
Multi-device Timing Community Group. https://www.w3.org/community/webtiming.

We'll take some time to digest it, because there are many issues in the
discussion that fundamentally come down to timing.

Up front I can indicate that the HTMLTimingObject which we have recently
drafted http://webtiming.github.io/timingobject/ is not only intended for
multi-device timing, but for single-device as well.
The timing group will also soon document a new, improved and generalized
version of the HTMLTrackElement that interfaces directly with the proposed
HTMLTimingObject. Together, these two concepts will address a wide area of
timing related issues, including millisecond precise time-alignment of
alternative tracks of timed data (from different sources), as well as
dynamic modification of time-aligned data (live or later). With the
HTMLTimingObject connected to Shared Motion, these properties are also
available in the distributed scenario. Though standardization will likely
take some time, we already have full implementations of these concepts in
regular use (for instance see demos in the MTCG blog).

If you wish to look further into the background of this, we have just
published a paper on distributed temporal composition of Web-based media
(which is just a fancy way of talking about time-alignment of alternative
data sources and media sources). This paper gives a high level perspective
into the approach adopted by the Multi-device Timing CG.



Ingar Arntzen, Chair Multi-device Timing Community Group

2015-05-07 11:24 GMT+02:00 Daniel Davis <ddavis@w3.org>:

> Hello all,
> This is to let you know about a discussion within the HTML Working Group
> Media Task Force that would benefit from wider input, especially from
> people here in the Web and TV Interest Group.
> Initially intended as part of the MSE spec, it's currently a collection
> of use cases for alternate content insertion in media [1]. However at
> the recent Media Task Force face-to-face meeting [2] it was deemed that
> the scope could be more than just MSE. There may even be some cross-over
> with the current GGIE work [3] and so before a solution or target spec
> is decided on there needs to be more feedback.
> If this topic is of interest to you please could you take a look at the
> use cases listed so far and feel free to edit, add or comment based on
> your experience and requirements? The face-to-face meeting minutes are a
> good place to see the discussion so far:
> http://www.w3.org/2015/04/15-html-media-minutes.html#item05
> Thank you in advance,
> Daniel Davis
> W3C
> [1]
> https://www.w3.org/wiki/HTML/Media_Task_Force/MSE_Ad_Insertion_Use_Cases
> [2] https://www.w3.org/wiki/HTML/wg/2015-04-Agenda
> [3] https://www.w3.org/2011/webtv/wiki/GGIE_TF
Received on Thursday, 7 May 2015 10:06:20 UTC

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