The option includes legible content in the language of its specified locale that transcribes spoken dialog.
- iOS 5.0+
- macOS 10.8+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
It is 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
For QuickTime movie and .m4v files, a media option is considered to have the characteristic
AVMedia only if it’s explicitly tagged with that characteristic.