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ISSUE-346: Need ttp:mediaDuration parameter [TTML2]

From: Timed Text Working Group Issue Tracker <sysbot+tracker@w3.org>
Date: Sun, 21 Sep 2014 12:34:52 +0000
Message-Id: <E1XVgLs-0006rV-P1@stuart.w3.org>
To: public-tt@w3.org
ISSUE-346: Need ttp:mediaDuration parameter [TTML2]

http://www.w3.org/AudioVideo/TT/tracker/issues/346

Raised by: Glenn Adams
On product: TTML2

In order to perform ISD processing, it is necessary to know the duration of root external extent. When associate with a related media object, this is the simple duration of the related media object. If this is known at authoring time, then it is an important parameter that should be specified. I propose defining a ttp:mediaDuration parameter attribute that takes either an offset-time form of a time expression or the keyword "indefinite", where the latter is used (or implied) when no related media object exists or its simple duration is unknown or indefinite. If this parameter is not specified, then it would be treated as if indefinite were specified.
Received on Sunday, 21 September 2014 12:34:53 UTC

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