Exif DateTimeOriginal Mass-Fix

check_exif.rb

require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'
  # gem 'exifr'
  gem 'mini_exiftool'
  gem 'activesupport', require: 'active_support/all'
  gem 'pry'
end

# Expects images in:
#  YEAR/YYYY-MM-DD/*.jpg
# Will adjust the datetimeoriginal if more than 1 day difference or broken old format
# Will fix DateTimeOriginal if it is missing OR
all = Dir['*/**/*.jpg', '*/**/*.jpeg', '*/**/*.JPG', '*/**/*.JPEG']

# to improve speed after rerun pass a picture to skip until
last = "2009/2009-01-31/glaschuete.JPG"
last = nil


class ImageFix
  attr_reader :file
  def initialize(file)
    @file = file
  end

  def run
    unless should_be_date
      log :error, "could not find should-be-date in path"
      exit 1
    end
    dt = exif["datetimeoriginal"] || exif["createdate"]
    if dt.is_a?(String)
      fixup_broken_date(dt)
    end
    if skip?(dt)
      print '.'
      return
    end
    # +0.5 to go to middle of the day
    update_date = Date.parse(should_be_date).to_datetime + 0.5
    exif["datetimeoriginal"] = update_date
    exif["createdate"] = update_date

    log :update, "update #{update_date} (was '#{dt}')"
    exif.save
  end

  private

  def log(type, msg)
    puts "\n[#{type.to_s.upcase}] @ #{@file} #{msg}"
  end

  def skip?(dt)
    # no existing Exif date
    return false unless dt

    # partial match -> nothing
    return true if dt.to_s[should_be_date]

    # OK if within 1 day LATER
    target = should_be_date.to_date
    dt.to_date <= target.to_date + 1
  end

  def fixup_broken_date(dt)
    if dt[/(\d\d\d\d):(\d?\d):(\d?\d)(.*)/]
      # use .rjust(2, "0") to pad with leading zeros
      new_dt = "#{$1}-#{$2.rjust(2, "0")}-#{$3.rjust(2, "0")}#{$4}"
      log :fix, "fixing date format from '#{dt}' to '#{new_dt}'"
      dt = Time.parse(new_dt)
      exif["datetimeoriginal"] = dt
      exif["createdate"] = dt
      exif.save
    else
      log :warn, "could not fixup date '#{dt}'"
    end
  end

  def exif
    @exif ||= MiniExiftool.new(file)
  end

  def should_be_date
    @should_be_date ||= @file.split('/').find { |i| i =~ /\d{4}-\d{2}-\d{2}/ }
  end
end

todo = if last
         all.drop_while { |i| i != last }
       else
         all
       end
todo.each do |file|
  ImageFix.new(file).run
end

FIX_EXIF_DATE.md

Mass-Fix EXIF date of photo collection, especially scans, social media files received etc.

If you have your photos correctly sorted in a way:

*/2007-01-01/*.jpg

that script can loop through all and check if the exif DateTimeOriginal matches with the folder.

It will FIX the date, if:

• There is no DateTimeOriginal
• DateTimeOriginal is broken but fixable (Older cameras, like my Canon Powershop produced 2005:2:3 HH:MM_
• The folder's name=date is (at least 1 day) OLDER than the current exif suggests (e.g. Scans, whatsapp photos etc.)