pub unsafe static AVMetadataIdentifierQuickTimeMetadataLivePhotoVitalityScore: Option<&'static AVMetadataIdentifier>AVMetadataIdentifiers only.Expand description
A value of type kCMMetadataBaseDataType_Float32.
Live Photo movies may be algorithmically scored from 0. to 1. on their level of vitality. A Live Photo movie with a low vitality score offers little dynamism to the still photo it accompanies. The vitality score is normalized and independent of the vitality scoring version of the algorithm (see AVMetadataIdentifierQuickTimeMetadataLivePhotoVitalityScoringVersion). If a Live Photo movie contains the AVMetadataIdentifierQuickTimeMetadataAutoLivePhoto key and its value is non-zero, apps should read the AVMetadataIdentifierQuickTimeMetadataLivePhotoVitalityScore value and only display the movie’s content if the score is 0.5 or higher. If the capture session includes a metadata output configured to provide face, dog, or cat metadata objects, their presence will greatly increase the vitality score.
See also Apple’s documentation