- Usage
$> python calc_wpsnr.py -h
$> python calc_wpsnr.py original_yuv_file_path decoded_yuv_file_path width height --maxval val

- Example
$ >python calc_wpsnr.py HLG1_PQ.yuv dec_HLG1_PQ.yuv 3840 2160 (will use a maxval of 1020)
$> python calc_wpsnr.py HLG1_PQ.yuv dec_HLG1_PQ.yuv 3840 2160 --maxval 1023 (will use a maxval of 1023)

