VTHDRPerFrameMetadataGenerationSession An object that generates per-frame HDR metadata. Declarationclass VTHDRPerFrameMetadataGenerationSession TopicsCreating a sessioninit(framesPerSecond:hdrFormats:)Attaching metadataattachMetadata(to:sceneChange:)HDR FormatsVTHDRPerFrameMetadataGenerationSession.HDRFormat