How to test Captions for multimedia

Which standards this maps to

Korean standard (KWCAG 2.2)

5.2.1 Captions for multimedia

Perceivable

International standard (WCAG 2.2)

1.2.1 Audio-only and Video-only (Prerecorded) (A) ↗1.2.2 Captions (Prerecorded) (A) ↗1.2.3 Audio Description or Media Alternative (Prerecorded) (A) ↗

How to test it

Play each video/audio and confirm captions, transcript, or sign language are provided and synchronized.

What automation covers

3 automated rules judge this checkpoint. Each comes with remediation guidance.

• Video elements must have captions video-caption

  Provide captions via a track element, or at minimum a transcript.

• Audio elements must have captions or transcript audio-caption

  Provide a transcript or caption track for audio content.

• Video has no captions track a11ychk:captions-track

  Video with audio needs captions. Add <track kind="captions">, or verify manually if captions are provided another way.