Marcelo Paiva

All criteriaPresent as slides

A bald bearded man in a collared shirt leans over a desk toward a laptop beside a steaming mug.Meant to show: A deaf man with a shaved head and a red beard, in a pressed shirt

Success criterion 1.2.4

Captions (Live)

Captions are provided for all live audio content in synchronized media.

  • Level AA
  • Principle 1: Perceivable
  • Guideline 1.2: Time-based Media

In a user’s words

“It's live for everyone else. For me it's a silent movie with a three-day wait for the subtitles.”

Who this helps: Deafness, Hard of Hearing

What each role can do

Product manager
Budget for live captioning, by a human captioner or a vetted automatic service, for every live event.
Designer
Design the live player with a visible captions toggle and space for captions that does not cover the speaker.
Developer
Integrate a real-time caption feed into the live stream and keep the delay as short as possible.
Tester
Join a live rehearsal and check caption accuracy, delay and the toggle on several devices.

Once it is fixed

“I laughed at the joke at the same moment as the room. That's what live means!”

The quotes are written to illustrate the criterion. They are not testimonials from real people. For the official wording, find 1.2.4 in the W3C quick reference for WCAG 2.2 (opens in a new tab).

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