img2date

#!/usr/bin/env bash
################################################################################
# img2date - renames photos based on the date/time they were captured. Uses EXIF
# information to determine the capture date.
#
# Dependencies: exiftool
#
# Version 1
# Matthew Malensek <matt@malensek.net>
################################################################################

print_usage() {
cat <<EOM
$(basename ${0}) renames photos based on the date they were captured.
Usage: $(basename ${0}) file1 file2 ... fileN
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

if [[ ${#} -lt 1 ]]; then
    print_usage
    exit 1
fi

for file in ${@}; do
    base=$(basename "${file}")
    noext="${base%.*}"
    time=$(exiftool -p '$dateTimeOriginal' -d '%s' "${file}")
    newname="${file[@]/${noext}/${time}}"
    mv -v -i "${file}" "${newname}"
done