[Athen] Captioning - OGV file format

Ken Petri petri.1 at osu.edu
Thu Apr 15 11:20:14 PDT 2010

Hi Dawn,

There is a rather humorous proof of concept here:


The basic jump-off that will eventually take you to this article/demo and a
lot of other speculation and info from Bruce Lawson is here:
http://www.brucelawson.co.uk/. Linked toward the bottom of the page are a
number captioning-related posts.

Best regards,
Ken Petri
Program Director
OSU Web Accessibility Center
102D Pomerene Hall
1760 Neil Avenue
Columbus, Ohio 43210
Phone: (614) 292-1760
Fax: (614) 292-4190
mailto:petri.1 at osu.edu

On Thu, Apr 15, 2010 at 2:08 PM, John Foliot <jfoliot at stanford.edu> wrote:

> Dawn Hunziker wrote:

> >

> > I have a department at the University of Arizona that wants to post .ogv

> > video formats on their Website. We are working with Automatic Sync

> > Technologies for the captioning of other media files but .ogv is not

> > supported. Has any successfully captioned this type of file? If so,

> > what steps did you take?


> Captioning OGG files is still kind of 'tricky', but certainly worth

> investigating further. I might suggest you start here:

> http://blog.gingertech.net/2010/02/19/accessibility-support-in-ogg-and-lib

> oggplay/<http://blog.gingertech.net/2010/02/19/accessibility-support-in-ogg-and-lib%0Aoggplay/>


> Silvia is one of the lead engineers working with Mozilla towards

> implementation of the <video> element in HTML5 (which currently does not

> specify *how* to include captions, but we're working on it), and is likely

> one of the most knowledgeable people I know when it comes to OGG files

> (which are already supported in FireFox 3.6, Opera 10.5 and Chrome

> browsers using the native HTML5 <video> element.


> Moving forward (i.e. hopefully in the near future), captioning for OGG in

> HTML5 will require either .SRT files or a profile of .DFXP (.XML)

> time-stamp files, and will likely take a pattern along the lines of what

> is described here:

> http://www.w3.org/WAI/PF/HTML/wiki/Media_TextAssociations (there is also a

> proposed JavaScript API for extracting captions bundled inside a media

> wrapper such as OGG or H.264 -

> http://www.w3.org/WAI/PF/HTML/wiki/Media_MultitrackAPI


> PLEASE NOTE: This is very much a work in progress, and like many aspects

> of HTML5 is subject to change at any time, so this is for this group's

> information only and is NOT a recommended technique at this time. As well,

> these particular proposals have not even advanced to the larger HTML5

> Working Group at the W3C, but are draft proposals at the Accessibility

> Task Force level (for those who care about such things). That said, it's

> exciting and promising, and we may even start seeing implementation as

> early as this fall, so stand-by for details.


> JF

> ============================

> John Foliot

> Program Manager

> Stanford Online Accessibility Program

> http://soap.stanford.edu

> Stanford University

> Tel: 650-862-4603


> Co-chair HTML5 Accessibility Task Force (Media Sub Group)

> http://www.w3.org/WAI/PF/html-task-force

> ============================




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> Athen at athenpro.org

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