describesVideoForAccessibility
A media characteristic that indicates the media includes audible content that describes the visual portion of the presentation.
Declaration
static let describesVideoForAccessibility: AVMediaCharacteristicDiscussion
It’s possible for a legible media option to include both transcriptions of spoken dialog and descriptions of music and sound effects.
The value of this characteristic is public.accessibility.describes-video.
For QuickTime movies and .m4v files, a media option has this characteristic only if the media’s author tags it that way.