1 0 SetAVTransportURI InstanceID in A_ARG_TYPE_InstanceID CurrentURI in AVTransportURI CurrentURIMetaData in AVTransportURIMetaData Play InstanceID in A_ARG_TYPE_InstanceID Speed in TransportPlaySpeed Stop InstanceID in A_ARG_TYPE_InstanceID A_ARG_TYPE_InstanceID ui4 AVTransportURI string AVTransportURIMetaData string TransportPlaySpeed string 1