SC-1.2.4: Live stream without captions

Corpus WCAG 2.2Applies to WCAG 2.0, 2.1, 2.2Level AAAutomatable: partial

Summary: A live video broadcast has no caption track.

Why it fails: Deaf and hard-of-hearing users cannot follow live dialogue or sound effects because no captions are provided for the live stream.

Failure technique

Synthetic specimen — no W3C failure technique.

Understanding

https://www.w3.org/WAI/WCAG22/Understanding/captions-live

Quickref

https://www.w3.org/WAI/WCAG22/quickref/#captions-live

Intentional failure — audit this region

SC-1.2.4

Live stream (no captions provided):

<p>Live stream (no captions provided):</p>
<video id="sc124-live" width="320" autoplay muted playsinline>
  <source src="/assets/talking-head.mp4" type="video/mp4">
</video>

Expected audit result

1.2.4: fail — Specimen demonstrates failure of 1.2.4.

Manual check: Confirm the stream is live and no real-time captions are available.