PiBox » VideoLib

#!/bin/bash

for file in `ls -1`

do

    prefix=`echo $file | cut -f1 -d"."`

    orig=`ls -l $file`

    echo "--- Processing $file "

    convert $file $prefix.png

    convert $prefix.png -resize 400x400 $prefix.new.png

    optipng -o7 $prefix.new.png

    rm -f $prefix.png

    mv $prefix.new.png $file

    echo "$orig"

    ls -l $file

done