Reproducing method and apparatus

A reproducing method for reproducing video stream, video stream, the maximum value of the dynamic range of the luminance is constituted by a first dynamic range in excess of 100 nit, the display device is narrower second than the first dynamic range a display device for displaying an image dynamic range, the video stream based on the hybrid OETF determines whether or not quantized, the video stream is quantized based on hybrid OETF determination If you, the video stream, without luminance conversion for converting the first dynamic range to the second dynamic range, reproduces the video stream, when the unquantized based on hybrid OETF If it is determined, as well as performing luminance conversion on the video stream, movies To play the stream.