imgdaten

#!/usr/bin/env bash
################################################################################
# imgdaten - image date numbering script. This script reads a directory of image
# files' EXIF data and then renumbers the files in chronological order (0000,
# 0001, 0002, etc). Helpful if a set of images were produced by two different
# cameras with different numbering schemes.
#
# Dependencies: exiftool
#
# Version 1
# Matthew Malensek <matt@malensek.net>
################################################################################

print_usage() {
cat <<EOM
Usage: $(basename ${0}) <image_dir>
EOM
}

if ! ( which exiftool &> /dev/null ); then
    echo "Couldn't find exiftool!"
    echo "(http://www.sno.phy.queensu.ca/~phil/exiftool/index.html)"
    exit 1
fi

dir=${1}

if [[ ! -d "${dir}" ]]; then
    print_usage
    exit 1
fi

echo "Reading image EXIF data..."
timelist=$(exiftool \
    -p '$dateTimeOriginal'$'\t''$directory/$filename' \
    -d '%s' \
    "${dir}" | sort -n)

counter=0
IFS=$'\n'
for img in $(echo "${timelist}"); do
    imgname=$(cut -f 2- <<< "${img}")
    imgdir=$(dirname "${imgname}")
    newname=$(printf "%s/%04d.%s" "${imgdir}" ${counter} "${imgname##*.}")
    mv -v "${imgname}" "${newname}"
    (( counter++ ))
done