Created
December 12, 2015 01:46
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#!/bin/sh | |
# | |
# NOTE: this only works on OSX due to the syntax of the stat command | |
# | |
# brew install jpeg jpegoptim | |
inFile=$1 | |
if [ -z $inFile ]; then | |
echo "Syntax: $0 filename" | |
exit | |
fi | |
inFileSize=$(stat -f%z "$inFile") | |
tempFile=$inFile.tempFile.jpg | |
#echo "Shrinking $inFile ..." | |
if [ ! -e $inFile ]; then | |
echo "$inFile dont exist" | |
exit | |
fi | |
# strips useless stuff (like comments and timestamps) and optimizes file without changing compression | |
jpegtran -v -optimize -copy none -outfile $tempFile $inFile 2> /dev/null | |
if [ $? -ne 0 ]; then | |
echo "Error occured while processing $inFile" | |
exit | |
fi | |
outFileSize=$(stat -f%z "$tempFile") | |
diffSize=$(($inFileSize - $outFileSize)) | |
if [ $diffSize -lt 1 ]; then | |
# echo "Error: resulting $inFile is not smaller than the original ($diffSize)" | |
rm $tempFile | |
exit | |
fi | |
echo "$inFile was $inFileSize bytes, shrank to $outFileSize. saved $diffSize bytes" | |
rm $inFile | |
mv $tempFile $inFile |
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