reference,psnr,y_psnr,vmaf,ms_ssim S4-R01,33.1,34.1,24.2,29.0 S4-R02,55.4,56.9,38.2,53.6 S4-R03,66.7,68.9,58.0,62.8 S4-R04,30.1,32.9,37.9,30.3 Min,30.1,32.9,24.2,29.0 Max,66.7,68.9,58.0,62.8 Avg,46.3,48.2,39.6,43.9