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# 1.2.3 Audio Description or Media Alternative (Prerecorded)

- Level: A
- Guideline: 1.2 Time-based Media
- Principle: 1 Perceivable

## What it is

An alternative for time-based media or audio description of the prerecorded video content is provided for synchronized media, except when the media is a media alternative for text and is clearly labeled as such.

## How to test

- Check: An alternative for time-based media or audio description of the prerecorded video content is provided for synchronized media, except when the media is a media alternative for text and is clearly labeled as such.
- Use the sufficient techniques below as acceptable methods when applicable.

## Sufficient techniques (W3C)

- G69: Providing an alternative for time based media
- G58: Placing a link to the alternative for time-based media immediately next to the non-text content
- H53: Using the body of the object element
- G78: Providing a second, user-selectable, audio track that includes audio descriptions
- G173: Providing a version of a movie with audio descriptions
- SM6: Providing audio description in SMIL 1.0
- SM7: Providing audio description in SMIL 2.0
- G226: Providing audio descriptions by incorporating narration in the soundtrack
- Using any player that supports audio and video
- G8: Providing a movie with extended audio descriptions
- SM1: Adding extended audio description in SMIL 1.0
- SM2: Adding extended audio description in SMIL 2.0
- G203: Using a static text alternative to describe a talking head video

## Advisory techniques (W3C)

- H96: Using the track element to provide audio descriptions

## Resources

- WCAG 2.2 SC: https://www.w3.org/TR/WCAG22/#audio-description-or-media-alternative-prerecorded
- Understanding: https://www.w3.org/WAI/WCAG22/Understanding/audio-description-or-media-alternative-prerecorded.html
- Quick reference: https://www.w3.org/WAI/WCAG22/quickref/?versions=2.2#audio-description-or-media-alternative-prerecorded

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