Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
This script re-sizes and optionally renames files in the current folder using the Imagemagick convert program.
#!/usr/bin/env bash
#
# By Drew Hornbein @ http://dhornbein.com
#
# Description: The following script will take image files from
# the current folder and run the Imagemagick convert function.
# A log.txt file will be created in the new folder
#
# Dependencies:
# imagemagick - we use the convert program
#
# Options:
#
# -n file_name
# new name: If you wish to rename all files add this flag.
# The new name will be numerated like so: new_name_001.jpg
#
# -s 1200x
# size: pass a argument to convert's resize flag.
# More info here: http://www.imagemagick.org/script/command-line-options.php#resize
# default: 1200x
#
# -q 90
# quality: pass a number to convert's quality flag
# 0-100 higher number is higher quality
# default: 90
#
# -o 'string'
# add option: add additional attributes to the convert function
#
# -O 'string'
# replace options: completely replace all attributes passed to the convert function
# with the attributes you input.
#
# -d ./processed/
# destination: where to send the converted files
# default ./processed/
#
# -v
# verbose: outputs information
set -e
# check for convert
convert -v foo >/dev/null 2>&1 || { echo "imagemagick 'convert' is required to run this script. try: sudo apt-get install imagemagick" >&2; exit 1; }
# set help and useage
HELPTEXT="help: `basename $0` (-n new file name) (-s resize ex: 1200x, 400x500^) (-q quality 0-100) (-o additional convert/mogrify options ex: \"-o '-extent 400x400'\") (-O capital o, replace parameters of convert/mogrify with input) (-d destination /path/name/) (-v verbose output)"
USETEXT="Usage: `basename $0` options (-n new file name) (-s resize) (-q quality) (-o additional convert/mogrify options) (-O replace convert/mogrify options) (-d destination) (-v verbose) -h for help"
# set default values
NEWNAME=false
NEWSIZE="1200x"
IMGQUALITY="90"
NEWOPTIONS=false
DEST=./processed/
if ( ! getopts "n:s:q:o:O:d:vh" opt); then
echo $USETEXT
fi
while getopts ":n:s:q:o:O:d:vh" opt; do
case $opt in
n)NEWNAME="$OPTARG";;
s)NEWSIZE="$OPTARG";;
q)IMGQUALITY="$OPTARG";;
d)DEST=${OPTARG%/}/;;
o)ADDOPTIONS="$OPTARG";;
O)NEWOPTIONS="$OPTARG";;
v)VERBOSE=true;;
h)
echo $HELPTEXT
exit 0
;;
\?)
echo "Invalid option: -$OPTARG" >&2
exit 1
;;
:)
echo "Option -$OPTARG requires an argument." >&2
exit 1
;;
esac
done
if [[ $NEWOPTIONS == false ]]
then
echo "(n)ew name: $NEWNAME"
echo "(s)ize: $NEWSIZE"
echo "(q)uality: $IMGQUALITY"
echo "(d)estination: $DEST"
fi
# prevents a null glob to be read
shopt -s nullglob
IMGGLOB=(*.{jpg,jpeg,JPG,JPEG,png,PNG,gif,GIF})
FILESLEN=${#IMGGLOB[@]}
i=1 #count
for INFILE in "${IMGGLOB[@]}"
do
NUM=$(printf "%0${#FILESLEN}d" $i);
EXT=${INFILE##*\.}
if [[ $NEWNAME != false ]];
then
FILENAME="${NEWNAME}_${NUM}.${EXT,,}"
else
FILENAME="${INFILE}"
fi
OUTFILE="$DEST${FILENAME}"
# check with the user to make sure everything is okay
if [[ -z $OKAY ]]; then
# build convert command
if [[ $NEWOPTIONS == false ]]
then
convert="convert '$INFILE' -resize '$NEWSIZE' -gravity center -density 72 -quality '$IMGQUALITY' $ADDOPTIONS $OUTFILE"
else
convert="convert '$INFILE' $NEWOPTIONS $OUTFILE"
fi
echo "This command will be run on each file:"
echo '$' $convert
echo -ne "Process these $FILESLEN file(s)? [Y/n]: "
read process
if [[ $process == "N" || $process == "n" ]]; then
echo "aborting..."
exit 42
else
OKAY=true
mkdir -p "$DEST"
echo -e "`date` ----------\n$convert" > "${DEST}log.txt"
fi
fi
if [[ $NEWOPTIONS == false ]]
then
convert "$INFILE" \
-resize "$NEWSIZE" \
-gravity center \
-density 72 \
-quality "$IMGQUALITY" \
$ADDOPTIONS \
"$OUTFILE"
else
convert "$INFILE" \
$NEWOPTIONS \
"$OUTFILE"
fi
IN="$INFILE ($(du -h "$INFILE" | cut -f1))"
if [ -f "$OUTFILE" ]; then
OUT="$OUTFILE ($(du -h "$OUTFILE" | cut -f1))"
fi
# build log file
echo "$IN ---> ${OUT-FAILED!}" >> "${DEST}log.txt"
if [[ $VERBOSE ]]; then
echo "$NUM $IN --> ${OUT-FAILED!}"
fi
(( i += 1 ))
done
notify-send "Conversion Finished of $i files"
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.