Saving file 'out.webp'
File:      in.png
Dimension: 1024 x 768
Output:    57644 bytes Y-U-V-All-PSNR 32.34 39.98 44.45   33.85 dB
           (0.59 bpp)

JPG CVVDP= 9.03 Fsize= 74.0 KB [ cjpeg -baseline -sample 1x1,1x1,1x1 -quality 27 ]

Webp CVVDP= 9.04 Fsize= 56.3 KB [ cwebp -m 6 -af -q 34 ]

JXL CVVDP= 9.03 Fsize= 58.8 KB [ cjxl -e 10 -q 57 ]

AVIF CVVDP= 9.03 Fsize= 41.0 KB [ avifenc -y 420 -d 10 -s 0 -q 42]


WebP compression efficiency relative to [ JXL:  116.4 % ] & [ AVIF: 53.6 % ]