Perceivable / 1.2 Time-based Media
1.2.2Captions (Prerecorded)
Level AProvide captions for all prerecorded audio in synchronized video, covering not just dialogue but speaker identification and important sound effects too. This lets people who are deaf or hard of hearing follow the content without relying on sound; audio-only or video-only content isn't covered here.
Note
A detailed commentary for this success criterion is not yet available. In the meantime, this page lists related patterns, techniques, and links to the normative sources.
Related Techniques
Specific implementation techniques for meeting this success criterion. This site doesn't include the full text, so follow the links to the original W3C documents.
Sufficient Techniques(5)
- G87: Providing closed captions(opens in a new tab)waic.jp(opens in a new tab)
- G93: Providing open (always visible) captions(opens in a new tab)waic.jp(opens in a new tab)
- H95: Using the track element to provide captions(opens in a new tab)waic.jp(opens in a new tab)
- SM11: Providing captions through synchronized text streams in SMIL 1.0(opens in a new tab)waic.jp(opens in a new tab)
- SM12: Providing captions through synchronized text streams in SMIL 2.0(opens in a new tab)waic.jp(opens in a new tab)
Failures(3)
- F8: Failure of Success Criterion 1.2.2 due to captions omitting some dialogue or important sound effects(opens in a new tab)waic.jp(opens in a new tab)
- 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(opens in a new tab)waic.jp(opens in a new tab)
- 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(opens in a new tab)waic.jp(opens in a new tab)
Normative References
- Success Criterion 1.2.2 Captions (Prerecorded) — WCAG 2.2(opens in a new tab)The normative requirement text.
- Understanding Captions (Prerecorded) — W3C(opens in a new tab)Official guidance on intent, examples, and techniques.