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[Bug 13544] Video: <track> element should allow support of more than one format without content sniffing

From: <bugzilla@jessica.w3.org>
Date: Wed, 03 Aug 2011 08:30:35 +0000
To: public-html-bugzilla@w3.org
Message-Id: <E1QoWqZ-0005z0-Dk@jessica.w3.org>

--- Comment #4 from Silvia Pfeiffer <silviapfeiffer1@gmail.com> 2011-08-03 08:30:34 UTC ---
(In reply to comment #2)
> The author should be able to specify a default track per track file type.
> http://dev.w3.org/html5/spec/Overview.html#dom-track-default
> The author might have the same content published in (for example) .ttml and
> .vtt, and may want to set a default in case two user agents don't suppot the
> same track file types.
> Also, setting the type on the track itself seems simpler:
> <video src="v.mp4">
>  <track kind=captions src=v.en.ttml srclang=en label="English" default>
>  <track kind=captions src=v.de.ttml srclang=de label="German">
>  <track kind=captions src=v.en.vtt srclang=en label="English" default>
>  <track kind=captions src=v.de.vtt srclang=de label="German">
> </video>

Hmm, if the ttml and vtt english caption tracks are alternatives with
essentially the same content, there should only ever one be chosen between
them. So, putting them in a <source> would make more sense, don't you think?

Also, there can only be a single @default attribute - it would be very
confusing to have several. Which one would a browser choose if it supports all
of the formats?

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Received on Wednesday, 3 August 2011 08:30:36 UTC

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