Optional
qualitiesA function that generates a label for a quality, usually a video quality.
Object with metadata about the quality for which the label should be generated.
Optional
subtitlesA function that generates a label for a subtitle.
The subtitle for which the label should be generated.
Optional
tracksA function that generates a label for a track, usually an audio track.
Object with metadata about the track for which the label should be generated. The id field is populated when used for HLS, the mimeType when used for DASH.
An object with callback functions to provide labels for audio tracks, qualities and subtitle tracks.