kVTCompressionPropertyKey_UsingHardwareAcceleratedVideoEncoder
A Boolean value indicating whether a hardware-accelerated video encoder is used.
Declaration
let kVTCompressionPropertyKey_UsingHardwareAcceleratedVideoEncoder: CFStringDiscussion
You can query this property using VTSessionCopyProperty(_:key:allocator:valueOut:) after you have enabled hardware accelerated encode using kVTVideoEncoderSpecification_EnableHardwareAcceleratedVideoEncoder to see if a hardware-accelerated encoder was selected (kCFBooleanTrue).