Understanding Success Criterion 1.2.4: Captions (Live)

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

Intent of Success Criterion 1.2.4: Captions (Live)

The intent of this Success Criterion is to enable people who are deaf or hard of hearing to watch real-time presentations. Captions provide the part of the content available via the audio track. Captions not only include dialogue, but also identify who is speaking and notate sound effects and other significant audio.

This success criterion was intended to apply to broadcast of synchronized media and is not intended to require that two-way multimedia calls between two or more individuals through web apps must be captioned regardless of the needs of users. Responsibility for providing captions would fall to the content providers (the callers) or the “host” caller, and not the application.

Benefits of Success Criterion 1.2.4: Captions (Live)

Examples of Success Criterion 1.2.4: Captions (Live)

Resources Success Criterion 1.2.4: Captions (Live)

Techniques for Success Criterion 1.2.4: Captions (Live)

Sufficient Techniques

  1. Creating captions for live synchronized media AND Providing open captions that are embedded directly in the video stream
  2. Creating captions for live synchronized media AND Providing closed captions using any readily available media format that has a video player that supports closed captioning
  3. Creating captions for live synchronized media AND Providing closed captions using one of the following techniques:

Captions may be generated using real-time text translation service.

Advisory Techniques

Failures