Update Image EXIF Informations

photo-touch.rb

#!/usr/bin/ruby
# encoding: utf-8
#
# Script for changing photo creation timestamp (in EXIF metadata and filesystem)
# If you're using rvm, please run script as `ruby photo-touch.rb`
# Tested in ruby-2.5.1
#
# Install ExifTool: http://www.sno.phy.queensu.ca/~phil/exiftool/install.html
#
# You need next gems for script to work (use gem install gem_name)
#  * mini_exiftool  (note: you need the ExifTool library!)
#
# 2018, Kai Park. Use it freely under the MIT license.
#

require 'rubygems'
require 'find'               # For Find.find (walk a directory)
require 'fileutils'          # For FileUtils.touch (change file timestamps)
require 'mini_exiftool'      # Exif metadata editing
require 'date'               # For DateTime

# Find all jpegs in currrent directory, change timestamps to required
Find.find('./') do |f| 
   if f.match(/\.jpg|jpeg|jfif\Z/i)
    photo = MiniExiftool.new(f)
    filename = File.basename(f)
    s_file = filename.split(".")[0].split("_")
    # B612 NameFormat is follow : 
    # B612_${YYMMDD}_#{HHMMDD}.jpg
    date = DateTime.parse("#{s_file[1]}T#{s_file[2]}+0900")
    puts "#{f}\t- #{filename}\t#{date}"                    # For debug purposes
    photo.date_time_original = date           # Change EXIF photo creation timestamp
    photo.save
    # if you wanna update UpdateTime
    #FileUtils.touch f, :mtime => DateTime.current         # Change filesystem creation timestamp
   end 
end