VGAR Visual Requirements
Requirements
Visual
- Support Zoom (VIS-001)
- Not Only Color (VIS-002)
- Color Contrast (VIS-003)
- No Images of Text (VIS-004)
- Text Alternatives (VIS-005)
- Audio Visual Media (VIS-006)
Audio Visual Media VIS-WEB-006
Provide captions and audio description for media (and an accessible player)
Video content must include accurate closed captions for all dialog. If video content provides any information visually that is not described by an accompanying audio track, it must also include an audio description track that fully explains that visual information. If an audio description track cannot fully explain the visual information during gaps in dialog, extended audio description must be used. The video must pause at appropriate times to allow for the description to finish.
Requirements
Captions for Video (VIS-WEB-006-01)
All video (both live AND prerecorded) content MUST include accurate captions.
WEBVTT
NOTE: These are closed captions for the CodeSniffer demonstration video
00:00:00.000 --> 00:00:05.000
This is a quick demonstration of the HTML CodeSniffer tool
00:00:06.000 --> 00:00:11.000
I have the Firefox browser open and I am on the Google.com web page
00:00:12.000 --> 00:00:16.000
and I am going to use the bookmark tab where I have saved HMTL CodeSniffer
Audio Description for Video (VIS-WEB-006-02)
If video content provides any information visually that is not described by an accompanying audio track, it MUST also include an Audio Description track that fully explains the visual information.
Extended Audio Description (VIS-WEB-006-03)
If an Audio Description track cannot fully explain the visual information during gaps in dialog, Extended Audio Description MUST be used (i.e., the video must pause at appropriate times to allow for the descriptions to finish).
Ways to Provide CC and AD (VIS-WEB-006-04)
Captions and Audio Description MUST be made available to users via one or more of the following methods (both need not use the same method):
- always on, included in the original video
- included as a separate file or track that can be toggled on and off by the user via an accessible mechanism (note: use of Extended Audio Description may complicate this)
- included as a video file and made available via a separate link(s) adjacent to the original video link
Transcripts for audio-only/video-only (VIS-WEB-006-05)
For audio-only and video-only media, a transcript MUST be provided which provides the same information as presented in the original media content.
Test Procedures
Visual Inspection (VIS-WEB-006-01-T)
Confirm that all video content (live AND prerecorded) provides accurate captions via an accessible mechanism.
Visual Inspection (VIS-WEB-006-02-T)
Confirm that any video content that provides information visually that is not described by the default audio track provides that information via an Audio Description track that fully explains the visual information.
Visual Inspection (VIS-WEB-006-03-T)
Confirm that If an Audio Description track cannot fully explain the visual information during gaps in dialog on the default video, Extended Audio Description is used, where the video is paused at appropriate times to allow for the descriptions to finish.
Visual Inspection (VIS-WEB-006-04-T)
Captions and Audio Description MUST be made available to users via one or more of the following methods (both need not use the same method):
- always on, included in the original video(open captions)
- included as a separate file or track that can be toggled on and off by the user via an accessible mechanism (note: use of Extended Audio Description may complicate this)
- included as a video file and made available via a separate link(s) adjacent to the original video link
Visual Inspection (VIS-WEB-006-05-T)
A transcript which provides the same information as presented in the original media content MUST be made available for all audio-only AND/OR video-only content.
Related Content
WCAG Success Criteria
W3C Techniques
G158: Providing an alternative for time-based media for audio-only content
G159: Providing an alternative for time-based media for video-only content
G166: Providing audio that describes the important video content and describing it as such
H96: Using the track element to provide audio descriptions
G93: Providing open (always visible) captions
G87: Providing closed captions
G69: Providing an alternative for time based media
G58: Placing a link to the alternative for time-based media immediately next to the non-text content
H78: Providing a second, user-selectable, audio track that includes audio descriptions
G173: Providing a version of a movie with audio descriptions
G8: Providing a movie with extended audio descriptions
G203: Using a static text alternative to describe a talking head video
Common Failures
- F8: Failure of Success Criterion 1.2.2 due to captions omitting some dialogue or important sound effects
- F75: Failure of Success Criterion 1.2.2 by providing synchronized media without captions when the synchronized media presents more information than is presented on the page
- F74: Failure of Success Criterion 1.2.2 and 1.2.8 due to not labeling a synchronized media alternative to text as an alternative
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