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Bug #19751 » strip_image_headers.sh

Administrator Admin, 2008-12-28 23:08

 
#!/bin/bash
#
# Strip image headers (profiles, comments)
# Author: John Angel, johnange at gmail.com, Dec 2008

test=0

if [ $# -lt 1 ]
then
echo "Strips image headers"
echo "Usage: strip_image_headers.sh [test] directory"
exit
fi

# Check if the first parameter is 'test'
if [ "$1" = "test" ]
then
test=1
directory=$2
else
directory=$1
fi

if [ ! -d $directory ]
then
echo "Directory $directory does not exist!"
exit
fi

for i in $directory/*
do

# Get image extension
ext="${i/*./}"

# Choose utility for stripping
case $ext in
jpg) transform="jpegtran -optimize -copy none -outfile tempimage.$ext $i";;
jpeg) transform="jpegtran -optimize -copy none -outfile tempimage.$ext $i";;
*) transform="convert -strip $i tempimage.$ext";;
esac

echo -n "$i "

if [ `expr index "$i" ' '` -gt 0 ]
then
echo "Space detected in filename - skipping."
continue
fi

$transform

if test $? -ne 0; then
echo "Error transforming - skipping."
else
size1=$(stat -c%s "$i")
size2=$(stat -c%s "tempimage.$ext")

echo -n "src: $size1 dst: $size2 "

if [[ "$size1" -le "$size2" ]]
then
echo "New size is not smaller - skipping."
else
if test $test -eq 0; then
echo "Replacing old image."
mv "tempimage.$ext" "$i"
else
echo "No replacing - just testing."
fi
fi

fi
done
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