2.1 KiB
2.1 KiB
1.2.1 Audio-only and Video-only (Prerecorded)
- Level: A
- Guideline: 1.2 Time-based Media
- Principle: 1 Perceivable
What it is
For prerecorded audio-only and prerecorded video-only media, the following are true, except when the audio or video is a media alternative for text and is clearly labeled as such:
- Prerecorded Audio-only: An alternative for time-based media is provided that presents equivalent information for prerecorded audio-only content.
- Prerecorded Video-only: Either an alternative for time-based media or an audio track is provided that presents equivalent information for prerecorded video-only content.
How to test
- Check: An alternative for time-based media is provided that presents equivalent information for prerecorded audio-only content.
- Check: Either an alternative for time-based media or an audio track is provided that presents equivalent information for prerecorded video-only content.
- Use the sufficient techniques below as acceptable methods when applicable.
- Confirm none of the common failures apply.
Sufficient techniques (W3C)
- G158: Providing an alternative for time-based media for audio-only content
- G159: Providing an alternative for time-based media for video-only content
- G166: Providing audio that describes the important video content and describing it as such
Advisory techniques (W3C)
- H96: Using the track element to provide audio descriptions
Common failures (W3C)
- F30: Failure of Success Criterion 1.1.1 and 1.2.1 due to using text alternatives that are not alternatives (e.g., filenames or placeholder text)
- F67: Failure of Success Criterion 1.1.1 and 1.2.1 due to providing long descriptions for non-text content that does not serve the same purpose or does not present the same information