Resize pictures in folder with ImageMagick

resizem.sh

#!/bin/bash

#
#   Resize all pictures in a folder
#
#   This will modify the files, so MAKE A BACKUP before!
#
#   usage:
#       $> resizem.sh folder/name
#

echo "Resizing images"
echo $(date)

find $1 -iname '*jpg' | while read fname; do
    width=$(identify $fname| cut -d' ' -f3|cut -d'x' -f1)
    size=$(stat --printf="%s" $fname)
    echo -n "Resizing ${fname}... "
    # Uncomment to pick your criteria
    #[ $width -gt 1280 ] && \
    #mogrify -limit memory 64 -limit map 32 -thumbnail 1280x1280 -quality 70 $fname
    [ $size -gt 500000 ] && \
    mogrify -limit memory 64 -limit map 32 -thumbnail 1280x1280 -quality 70 $fname
    echo "[OK]"
done

echo $(date)