# regular
# convert $argv[1].$argv[2] -resize 500x500 $argv[1]-rs.jpg
# cwebp -q 80 $argv[1]-rs.jpg -o $argv[1].webp
# mv $argv[1]-rs.jpg $argv[1].jpg
# rm $argv[1].$argv[2]

# png
convert $argv[1].$argv[2] -resize 500x500 $argv[1]-rs.$argv[2]
cwebp -q 80 $argv[1]-rs.$argv[2] -o $argv[1].webp
mv $argv[1]-rs.$argv[2] $argv[1].$argv[2]