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[Bug 18386] New: Ad-Insertion support

From: <bugzilla@jessica.w3.org>
Date: Tue, 24 Jul 2012 16:24:08 +0000
To: public-html@w3.org
Message-ID: <bug-18386-2495@http.www.w3.org/Bugs/Public/>

           Summary: Ad-Insertion support
           Product: HTML WG
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: HTML5 spec
        AssignedTo: ian@hixie.ch
        ReportedBy: duncan.rowden@bbc.co.uk
         QAContact: public-html-bugzilla@w3.org
                CC: mike@w3.org, public-html-wg-issue-tracking@w3.org,

As part of the Media Source Extension work, there's been some discussion on how
to  support Ad-insertion:

As this is a use-case that is not only subject to adaptive-bitrate streams, the
suggestion was made to file a bug against HTML spec itself.

The requirement is to have a way to frame-accurately define an outpoint for a
piece of content and switch to another. In order to save bandwidth it would
also be preferable if the UA would not buffer past this outpoint.

The subsequent text is not a proposal, just an illustration on how this could
be achieved:
- A setEndTime call could be defined, which takes a time value as its argument.
A UA would then only buffer to the point defined by setEndTime.

- A queue call could be defined to allow a subsequent media element to be
queued up. This could take in a time-offset argument to allow playback from a
defined point in the media. The second piece of media would then automatically
start playing (at the chosen offset) when the point defined by setEndTime is

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Received on Tuesday, 24 July 2012 16:24:15 UTC

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