New recipe: Audio description for video content

[elynema]

Recipe Name

Audio description for video content

Use case

As part of WCAG 2.1 AA, Audio description is required to be provided for any video content where there is meaningful information conveyed visually that is not provided in the audio.

Audio description may be rendered in numerous ways, including as an alternate textual track, alternate audio track, or alternate video track. In any viewer, audio description is only turned on by user request. In order for the viewer to present these options to the user as audio description, it must be able to identify the audio description.

See more details in the use case: IIIF/iiif-stories#145

Audio description examples:

• Smithsonian video
• PBS video

Other considerations

The proposed new provides property would be used to identify audio description.

Here are some manifests constructed by the AV Annotations TSG (don't point to real resources) to see how this might work:

• Audio description as vtt file
• Audio description as audio file