Saving file 'out.webp'
File:      in.png
Dimension: 1136 x 856
Output:    173500 bytes Y-U-V-All-PSNR 34.07 36.96 36.42   34.78 dB
           (1.43 bpp)

JPG CVVDP= 9.52 Fsize= 249.5 KB [ cjpeg -baseline -sample 1x1,1x1,1x1 -quality 64 ]

Webp CVVDP= 9.53 Fsize= 169.4 KB [ cwebp -m 6 -af -q 57 ]

JXL CVVDP= 9.52 Fsize= 164.0 KB [ cjxl -e 10 -q 76 ]

AVIF CVVDP= 9.53 Fsize= 135.5 KB [ avifenc -y 420 -d 10 -s 0 -q 54]


WebP compression efficiency relative to [ JXL:  93.7 % ] & [ AVIF: 70.3 % ]