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[Bug 12813] [WebVTT] explain cue settings semantics

From: <bugzilla@jessica.w3.org>
Date: Mon, 30 May 2011 05:12:15 +0000
To: public-html-bugzilla@w3.org
Message-Id: <E1QQulz-0001u2-Ok@jessica.w3.org>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=12813

--- Comment #1 from Silvia Pfeiffer <silviapfeiffer1@gmail.com> 2011-05-30 05:12:15 UTC ---
(In reply to comment #0)
> The meaning of the cue settings is not explicitly spelled out - people have to
> infer it from the way in which they get used once mapped into HTML through
> <track> rather than being able to understand from reading the WebVTT spec.
> 
> It would be nice to have an explanation where cue settings are first mentioned,
> near
> http://www.whatwg.org/specs/web-apps/current-work/webvtt.html#webvtt-cue-settings
> .
> 
> Something like:
> 
> A WebVTT vertical text cue setting:
>   The vertical text cue setting defines whether text inside the text rendering
> box is rendered horizonally or vertically and whether it is ltr or rtl within
> the text rendering box.
> 
> A WebVTT line position cue setting:
>   The line position cue setting defines whether the text rendering box is
> positioned at the bottom of the video viewport or moved up from there by a
> viewport height percentage or number of lines.
> 
> A WebVTT text position cue setting:
>   The text position cue setting defines whether the text rendering box is
> positioned at the left of the video viewport or moved across from there by a
> viewport width percentage or number of pixels.
> 
> A WebVTT size cue setting:
>   The size cue setting defines the text size of text inside the text rendering
> box either in percent or pixels.
> 
> A WebVTT alignment cue setting:
>   The alignment cue setting defines whether the text inside the text rendering
> box is aligned to the box's start/middle/end, where start/middle/end is also
> influenced by the vertical cue setting, i.e. meaning top and bottom for
> vertically rendered text.

Actually, much of this is explained at
http://www.whatwg.org/specs/web-apps/current-work/multipage/the-iframe-element.html#text-track-cue,
but just not extracted into the WebVTT document.

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Received on Monday, 30 May 2011 05:12:17 UTC

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