pub unsafe static AVMetadataQuickTimeMetadataKeyCameraFocalLength35mmEquivalent: Option<&'static AVMetadataKey>Available on crate feature
AVMetadataFormat only.Expand description
A value of type kCMMetadataBaseDataType_UTF8 indicating focal length normalized to the 35mm film equivalent value (e.g. “50.00mm”).
This is track-level metadata for video track that is associated with the camera.
See also Apple’s documentation