Saving file 'out.webp'
File:      in.png
Dimension: 864 x 576
Output:    56572 bytes Y-U-V-All-PSNR 33.24 34.16 34.03   33.50 dB
           (0.91 bpp)

JPG CVVDP= 9.01 Fsize= 66.1 KB [ cjpeg -baseline -sample 1x1,1x1,1x1 -quality 28 ]

Webp CVVDP= 9.01 Fsize= 55.2 KB [ cwebp -m 6 -af -q 41 ]

JXL CVVDP= 9.02 Fsize= 59.5 KB [ cjxl -e 10 -q 58 ]

AVIF CVVDP= 9.02 Fsize= 44.8 KB [ avifenc -y 420 -d 10 -s 0 -q 45]


WebP compression efficiency relative to [ JXL:  165.2 % ] & [ AVIF: 51.2 % ]