Saving file 'out.webp'
File:      in.png
Dimension: 864 x 576
Output:    107106 bytes Y-U-V-All-PSNR 38.29 37.92 37.87   38.15 dB
           (1.72 bpp)

JPG CVVDP= 9.51 Fsize= 114.1 KB [ cjpeg -baseline -sample 1x1,1x1,1x1 -quality 60 ]

Webp CVVDP= 9.51 Fsize= 104.6 KB [ cwebp -m 6 -af -q 79 ]

JXL CVVDP= 9.52 Fsize= 93.9 KB [ cjxl -e 10 -q 77 ]

AVIF CVVDP= 9.52 Fsize= 93.2 KB [ avifenc -y 420 -d 10 -s 0 -q 63]


WebP compression efficiency relative to [ JXL:  47.0 % ] & [ AVIF: 45.5 % ]