gistfile1.sh

#!/usr/bin/env bash
# Transloadit API2. Copyright (c) 2015, Transloadit Ltd.
#
# This file
#  - Reproduces the issue where resizing a certain jpg breaks
#    the image on OSX & iOS, wheras the original dispays fine.
#
# Reported first by Richard Taylor in http://support.transloadit.com/discussions/questions/96479-image-conversion-problem
#
# Typically called as `./debug.sh [target.jpg]`
#
# Authors:
#  - Kevin van Zonneveld <[email protected]>

set -o pipefail
set -o errexit
set -o nounset
# set -o xtrace

# Set magic variables for current FILE & DIR
__dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
__file="${__dir}/$(basename "${BASH_SOURCE[0]}")"
__base="$(basename ${__file} .sh)"
__root="$(cd "$(dirname "${__dir}")" && pwd)"

converVersion="$(convert -version |awk '{print $3}' |head -n1)"
target="${1:-$converVersion}"
ext="jpg"

inFile="${__dir}/orig.${ext}"
outFile="${__dir}/${target}.${ext}"


if [ ! -f "${inFile}" ]; then
  wget "https://www.dropbox.com/s/rd4p6x1f5sx93jd/orig.jpg?dl=1" -O "${inFile}"
fi

rm -f "${outFile}"
convert \
  "${inFile}" \
"${outFile}"

echo ""
echo "${inFile}"
echo exiftool: $(exiftool "${inFile}" |egrep -i '(width|height)' || true)
echo      sips: $(sips -g pixelWidth -g pixelHeight "${inFile}" |egrep -i '(width|height)' || true)
echo ""

echo "${outFile}"
echo exiftool: $(exiftool "${outFile}" |egrep -i '(width|height)' || true)
echo      sips: $(sips -g pixelWidth -g pixelHeight "${outFile}" |egrep -i '(width|height)' || true)
echo ""