Rule: Captions (Live)

Rule ID Video 4
Conformance Required
Definition Captions are provided for all live audio content in synchronized media.
Purpose
  • Text and audio descriptions provide a means for people who cannot see the video to understand the video content.
  • Some types of learning disabilities affect visual processing, text and audio descriptions provide an alternative way to understand the video content.
Conformance Required
WCAG Success Criteria

Success Criterion 1.2.4 Captions (Live)

Other Related Success Criterion:

Rule Category Audio/Video
Rule Scope Element
Techniques
  • For the video element use the track element to add audio descriptions to the video content.
  • Use WebVTT to encode the timed stamped captioning information for the audio content.
  • For object and embed elements use aria-describedby to reference a text description of the video content.
Information Links