Re: Magnified Caption Files

comments inline

On Thu, Feb 8, 2018 at 3:28 PM, John Foliot <john.foliot@deque.com> wrote:

> 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!!
>
​another plus for me is seeing ​

​an implementation (several) of UAAG 1.1.6 Use Configurable Text for
Time-based Media Captions: and 1.1.7 Allow Resize and Reposition of
Time-based Media Alternatives  (
https://www.w3.org/TR/UAAG20/#gl-access-alternative-content)

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

​Hmm...  that's interesting.​ We did not call out or specifically remove
captions, however browser zoom does not impact captions much.  they grow
with with video when zoomed. In my testing with zoom and youtube the 400%
captions created by the player were significantly larger than zooming the
video.  different mechanisms and perhaps different user agents.  How ever,
at least in youtube, if I change the setting to make captions 400% they
wrap automagically! double WOOT!!
I think in answer to your question... perhaps indirectly. different
mechanism. the permutations are complicated. sticking with youtube...
browser at 100%, video is roughly 25% of the screen. captions default to
100%. If I go to full screen video goes to 200%, and captions get a bit
bigger - doesn't look 200%.- I didn't get out my ruler. I can still go into
the player settings and change the captions to 200%. The already larger
captions (because of full screen) will now double in size. I could go on...
but too many variables. The bottom line is -  You don't lose content and
you don't scroll horizontally - so it works like it should.
I thought this would be a boon for mobile. alas no. there are no settings
for captions other than on/off in the app or desktop view. One hopes soon.
Today the desktop.... tomorrow the phone!

>
> @nigel, have you seen this?
>
>    - Press Release: https://www.3playmedia.com/2014/05/09/
>    brightcove-responds-user-control-mandate-launching-
>    customizable-closed-captions/
>    <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/
>    <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
>



-- 
Jim Allan, Accessibility Coordinator
Texas School for the Blind and Visually Impaired
1100 W. 45th St., Austin, Texas 78756
voice 512.206.9315    fax: 512.206.9452 http://www.tsbvi.edu/
"We shape our tools and thereafter our tools shape us." McLuhan, 1964