- Success Criterion 1.2.5
- Conformance level AA
Audio Description Toggle That Doesn’t Actually Work
1.2.5 — Audio Description (Prerecorded)
Scenario
Setting
An e-book reader's library page
What’s wrong
Player offers audio description toggle that doesn't function or resets on each chapter.
Example
<video src="tutorial.mp4"></video>Why it matters
Blind and low-vision viewers who need spoken descriptions of important visuals.
How to test
Toggle the AD control in the player: if it doesn't actually enable the described track, or resets to off on each new chapter, it fails.
How to fix
An audio description track must describe all important visual-only content, using available pauses in dialogue.
<video src="tutorial.mp4"> <track kind="descriptions" src="ad-en.vtt" srclang="en"></video>Audio description narrates visual actions and on-screen content during the video's existing pauses.
Outcome
On an e-book reader's library page, this barrier is gone for blind and low-vision viewers who need spoken descriptions of important visuals — they get the same result as anyone else here.
Who is affected
Blind and low-vision viewers who need spoken descriptions of important visuals.
Learn more
- Understanding Understanding document (opens in a new tab)
Related scenarios
- Audio Description Track That Ignores Natural Dialogue Pauses
- Video With Visual-Only Info and No Audio Description Track
- Audio Description That Skips Essential On-Screen Actions
- Audio-Described Video Version That’s Broken or Blocked
- Talking-Head Video Wrongly Assumed to Need No Description
- Transcript Offered Instead of a Required Audio Description Track