Method of converting, in a device , a high-dynamic range HDR version of a picture to a standard-dynamic range SDR version of the picture, the method comprising: - obtaining first information data that indicates the presence of color mapping parameters, the color mapping parameters being used for converting the HDR version of the picture to the SDR version of the picture; - obtaining , from the device , second information data that indicates whether the device is configured to convert the HDR version of the picture to the SDR version of the picture by taking into account said color mapping parameters; - obtaining third information data that indicates whether converting the HDR version of the picture to the SDR version of the picture without taking into account the color mapping parameters is inhibited for the device ; in case the first information data indicates the presence of the color mapping parameters and the second information data indicates that the device is configured to convert the HDR version of the picture to the SDR version of the picture by taking into account said color mapping parameters, converting the HDR version of the picture to the SDR version of the picture by taking into account the color mapping parameters; and in case the second information data indicates that the device is not configured to convert the HDR version of the picture to the SDR version of the picture by taking into account said color mapping parameters: not converting the HDR version of the picture to the SDR version of the picture in case the first information data indicates the presence of the color mapping parameters and the third information data indicates that converting the HDR version of the picture to the SDR version of the picture without taking into account the color mapping parameters is inhibited for the device , and converting the HDR version of the picture to the SDR version of the picture without taking into account the color mapping parameters in case the first information data does not indicate the presence of the color mapping parameters and the third information data indicates that converting the HDR version of the picture to the SDR version of the picture without taking into account the color mapping parameters is not inhibited for the device . - obtaining first information data that indicates the presence of color mapping parameters, the color mapping parameters being used for converting the HDR version of the picture to the SDR version of the picture; - obtaining , from the device , second information data that indicates whether the device is configured to convert the HDR version of the picture to the SDR version of the picture by taking into account said color mapping parameters; - obtaining third information data that indicates whether converting the HDR version of the picture to the SDR version of the picture without taking into account the color mapping parameters is inhibited for the device ; not converting the HDR version of the picture to the SDR version of the picture in case the first information data indicates the presence of the color mapping parameters and the third information data indicates that converting the HDR version of the picture to the SDR version of the picture without taking into account the color mapping parameters is inhibited for the device , and converting the HDR version of the picture to the SDR version of the picture without taking into account the color mapping parameters in case the first information data does not indicate the presence of the color mapping parameters and the third information data indicates that converting the HDR version of the picture to the SDR version of the picture without taking into account the color mapping parameters is not inhibited for the device . <EOS>