A user account is required in order to edit this wiki, but we've had to disable public user registrations due to spam.

To request an account, ask an autoconfirmed user on IRC (such as one of these permanent autoconfirmed members).

Use cases for timed tracks rendered over video by the UA

From WHATWG Wiki
Revision as of 09:10, 24 April 2010 by Silviapfeiffer (talk | contribs) (No, this is not a joke - I think it will be very important for monetisation of timed text tracks!)
Jump to: navigation, search

This page contains examples of features where timed tracks are rendered over video by user agents natively.

Return to timed tracks home page.

Static Examples

These are categorised by what features they demonstrate that is most interesting.


This example shows how multiple segments with overlapping times should be automatically placed so as to not overlap: http://www.youtube.com/watch?v=xG9KluukpJI#t=2m40

This example shows that we need line-based positioning: http://www.youtube.com/watch?v=bw5JBWdaUHI#t=0m12s


Italics or other inline emphasis

italics and blod used together


Multiple voices

Important line feeds

Plain text

Background emphasis

This is from a mobile phone and needs particular contrast and visibility.

Multiple colors

Colors are often used in closing comments to signify the author of the captions.

Legal notices


Hyperlinks on caption cues or indivdual words


Formal documentation for real-world captioning

  • CBC captioning manual requires:
    • minor control over position
    • word-level italics control
    • frame-level timing