tvify

#!/usr/bin/env bash
################################################################################
# tvify - this script takes a folder of images and converts them for display on
# a 1080p TV (memory stick or similar). Proper image orientation will be
# maintained, and all available cores will be used to speed up processing.
#
# Dependencies: mogrify (provided by imagemagick)
#
# Version 1
# Matthew Malensek <matt@malensek.net>
################################################################################

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

# First, make sure we actually have the utility we need.
if ! ( which mogrify &> /dev/null ); then
    echo "Couldn't find 'mogrify' command!"
    echo "Please install imagemagick: http://www.imagemagick.org"
    exit 1
fi

dir="${1}"

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

cpus=$(getconf _NPROCESSORS_ONLN)
if [[ ${cpus} -le 0 ]]; then
    echo "Couldn't determine the number of CPUs. Falling back on 1."
    cpus=1
fi

find "${dir}" | xargs -t -n1 -P"${cpus}" \
    mogrify -resize 1920x1080 -auto-orient