Re: Magnified Caption Files

Hi Jim & LVTF,

Thanks for this - much appreciated.

I was able to find a live instance of the Brightcove player with the
caption settings control (click on the CC button to expand the menu), and
was pleasantly surprised to see it supported magnification up to 400% -
woot woot!!

Q: while SC 1.4.4 excludes captions specifically, would 'magnified
captions' be covered by SC 1.4.10 Reflow, even if indirectly?

@nigel, have you seen this?

   - Press Release:
   https://www.3playmedia.com/2014/05/09/brightcove-responds-user-control-mandate-launching-customizable-closed-captions/
   - Live Example:
   https://www.3playmedia.com/solutions/features/integrations/brightcove-integration/


JF

On Thu, Feb 8, 2018 at 2:49 PM, Jim Allan <jimallan@tsbvi.edu> wrote:

> Hi John,
> We had a good discussion about this today on the LVTF call [1].
> The LVTF does not believe that author testing with screen magnification
> will have any benefit for users. Screen magnification software will
> pixelate captions as it does the video and pictures. We don't know of
> anything the author could do to the captions that would prevent the
> pixelation.
>
> It seems the issue has been taken over by laws and technological
> advancements because of CVAA and 2014 FCC rules mandating user control of
> caption adjustments [2]. As examples, see 3PlayMedia's discussion of user
> interface controls for caption adjustments [3] and YouTubes caption
> settings [4]. Users are able to adjust captions to a significant degree.
>
> 1. https://lists.w3.org/Archives/Public/public-low-
> vision-a11y-tf/2018Feb/0014.html
> 2. http://www.fcc.gov/document/closed-captioning-quality-report-and-order-
> declaratory-ruling-fnprm
> 3. https://www.3playmedia.com/2014/05/09/brightcove-
> responds-user-control-mandate-launching-customizable-closed-captions/
> 4. https://support.google.com/youtube/answer/100078?co=
> GENIE.Platform%3DDesktop&hl=en
>
> Jim Allan, Chair Low Vision Task Force.
>
> On Wed, Feb 7, 2018 at 2:46 PM, John Foliot <john.foliot@deque.com> wrote:
>
>> (copying the WCAG Low Vision TF)
>>
>> All,
>>
>> As you are possibly aware, we are currently closing off some old comments
>> with the VTT Working Group (with spill-over to the TTML / IMSC Working
>> Group) around the ability to enlarge caption text to support Low Vision
>> users.
>>
>> Sylvia Pfeiffer responded with the following:
>>
>> If I understand correctly, you'd like me to add authoring guidance around
>> magnification and its potential impact.
>>
>> Could it be done with a single paragraph such as:
>> *"Authors of WebVTT caption and subtitle files are encouraged to test the
>> rendering of their files using Assistive Technology. Specifically, the use
>> of magnification tools by low-vision users may require editing their files
>> to allow for sufficient space within cue lines and cue line heights. It is
>> recommended to allow for a 200% magnification without clipping."*
>>
>> My personal opinion is that this is effectively what we seek (Ref: WCAG
>> SC 1.4.4 Resize Text), but before I respond more formally to the GitHub
>> issue (https://github.com/w3c/webvtt/issues/426) I'd welcome some
>> feedback.
>>
>> LVTF, does this sound right? LV members, have you encountered something
>> like this previously? (the ability to enlarge caption files independent of
>> the video?)
>>
>> APA - are we comfortable with Sylvia's proposal? Would something like
>> this also meet our needs with the TTML / IMSC group?
>>
>> Given that the VTT WG are keen on disposing with all comments, I'd like
>> to try and resolve this one fairly quickly.
>>
>> Thoughts?
>>
>> JF
>> --
>> John Foliot
>> Principal Accessibility Strategist
>> Deque Systems Inc.
>> john.foliot@deque.com
>>
>> Advancing the mission of digital accessibility and inclusion
>>
>
>
>
> --
> Jim Allan, Accessibility Coordinator
> Texas School for the Blind and Visually Impaired
> 1100 W. 45th St., Austin, Texas 78756
> <https://maps.google.com/?q=1100+W.+45th+St.,+Austin,+Texas+78756&entry=gmail&source=g>
> voice 512.206.9315 <(512)%20206-9315>    fax: 512.206.9452
> <(512)%20206-9452> http://www.tsbvi.edu/
> "We shape our tools and thereafter our tools shape us." McLuhan, 1964
>



-- 
John Foliot
Principal Accessibility Strategist
Deque Systems Inc.
john.foliot@deque.com

Advancing the mission of digital accessibility and inclusion