Opitimize JPEG and PNG to a both smaller file size and resolution

optimize_img.sh

#!/usr/bin/env bash

FOLDER=$1

MAX_WIDTH=1400
MAX_HEIGHT=1000

# resize, strip metadata and save in a lower quality
# aspect ratio will be kept.
find ${FOLDER} \( -iname '*.jpg' -o -iname '*.jpeg' -o -iname '*.png' \) -exec convert \{} -verbose -strip -quality 75 -resize "${MAX_WIDTH}x${MAX_HEIGHT}>" \{} \;