resize .webp extension image using cwep

Question

While resizing .webp file using cwebp, getting error

Error! Could not process file originalImage.webp
Error! Cannot read input picture file 'originalImage.webp'

Answer 1

Getting the same error when first parameter is .png an second is .webp . So i changed their places and it's worked.

 cwebp -o ancientnums.webp ancientnums.png

Workd fine, but i guess google have better instructions. This is