MediaTrackCharacteristic

public enum MediaTrackCharacteristic : String, Codable

Defines media characteristics that describe special properties of media tracks.

Media characteristics provide metadata about tracks that describe their purpose, accessibility features, or other special properties. These characteristics help media players and accessibility systems understand how to handle specific tracks.

  • Indicates that an audio track describes video content for accessibility.

    This characteristic is used for audio description tracks that provide spoken narration of visual elements in video content. It’s primarily used for accessibility to assist visually impaired users by describing actions, settings, and other visual information not conveyed through dialogue.

    The raw value corresponds to the standard accessibility identifier used by AVFoundation and other media frameworks.

    Declaration

    Swift

    case accessibilityDescribesVideo = "public.accessibility.describes-video"