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Bug 30132 - 2017-06-28
Summary: 2017-06-28
Status: NEW
Alias: None
Product: AudioWG
Classification: Unclassified
Component: Web Audio Processing: Use Cases and Requirements (show other bugs)
Version: unspecified
Hardware: PC Windows XP
: P2 normal
Target Milestone: TBD
Assignee: This bug has no owner yet - up for the taking
QA Contact: public-audio
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-06-28 15:04 UTC by bobjohanharahap
Modified: 2017-06-28 15:04 UTC (History)
0 users

See Also:

Attachments
expeeiment with un ratio (7.73 KB, text/plain)
2017-06-28 15:04 UTC, bobjohanharahap 		Details

Description bobjohanharahap 2017-06-28 15:04:09 UTC 
Created attachment 1672 [details]
expeeiment with un ratio

The <audio> and <video> elements in SVG need to have a peer element to contain timed text to support captions, subtitles and the text of descriptions. While an approximation to captions can be done using <animation>, this is not a good substitute to using a dedicated timed text format and there are no controls for the user to find them.

Proposal (1)
Allow <foreignObject> to have the Attributes for runtime synchronization so that for example an external TTML file may be referenced, or an embedded TTML resource.

Proposal (2) 
Add an explicit <timedText> element equivalent to <video> to provide such references.

Proposal (3)
Add system properties for captions, descriptions and subtitles in order to control the rendering of these formats.