A processing device comprising: a pull-down cadence detector (410; 1222) configured to receive an input video stream generated by pulling down raw data from an external device, detect a pull-down cadence format indicating a rate at which the raw data is pulled down based on the input video stream, and output detection result information; and a pull-down cadence controller (420; 500; 1230) configured to output an output video stream having a second frame rate that is an integer multiple of a first frame rate of the raw data, based on the input video stream and the detection result information, and characterized in that the detection result information comprises information indicating a type of the pull-down cadence format, the pull-down cadence controller (420; 500; 1230) is configured to output the output video stream by changing a third frame rate of the input video stream to the second frame rate when the type of the pull-down cadence format is a non-linear pull-down cadence format, wherein a non-linear pull-down cadence format indicates a pull-down ratio at which the third frame rate is a non-integer multiple of the first frame rate, and by bypassing the input video stream when the type of the pull-down cadence format is a linear pull-down cadence format, wherein a linear pull-down cadence format indicates a pull-down ratio at which the third frame rate is an integer multiple of the first frame rate. a pull-down cadence detector (410; 1222) configured to receive an input video stream generated by pulling down raw data from an external device, detect a pull-down cadence format indicating a rate at which the raw data is pulled down based on the input video stream, and output detection result information; and a pull-down cadence controller (420; 500; 1230) configured to output an output video stream having a second frame rate that is an integer multiple of a first frame rate of the raw data, based on the input video stream and the detection result information, and characterized in that the detection result information comprises information indicating a type of the pull-down cadence format, the pull-down cadence controller (420; 500; 1230) is configured to output the output video stream by changing a third frame rate of the input video stream to the second frame rate when the type of the pull-down cadence format is a non-linear pull-down cadence format, wherein a non-linear pull-down cadence format indicates a pull-down ratio at which the third frame rate is a non-integer multiple of the first frame rate, and by bypassing the input video stream when the type of the pull-down cadence format is a linear pull-down cadence format, wherein a linear pull-down cadence format indicates a pull-down ratio at which the third frame rate is an integer multiple of the first frame rate. by changing a third frame rate of the input video stream to the second frame rate when the type of the pull-down cadence format is a non-linear pull-down cadence format, wherein a non-linear pull-down cadence format indicates a pull-down ratio at which the third frame rate is a non-integer multiple of the first frame rate, and by bypassing the input video stream when the type of the pull-down cadence format is a linear pull-down cadence format, wherein a linear pull-down cadence format indicates a pull-down ratio at which the third frame rate is an integer multiple of the first frame rate.