Level AASince WCAG 2.0
1.2.4 Captions (Live)
Guideline 1.2: Time-based Media – Audio and video need captions, descriptions or transcripts.
What does the rule require?
Live videos with sound also have captions that run in real time.
How to get it right
Plan real-time captioning (CART) for live streams and webinars, or use live captions that a person monitors.
Who benefits most?
- Deaf people
Official wording
This page explains the rule in simple words. Only the original W3C text is normative.
- “Understanding Captions (Live)” at W3C (external site)
- Techniques in the WCAG Quick Reference (external site)