A Ruby script to rename HEIC and MOV files with date taken in Exif data on macOS

rename_media.rb

# Requires exiftool, install using Homebrew:
#   brew install exiftool

require 'time'

Dir.glob('*.{heic,mov}') do |file|
  puts "Renaming #{file}"

  case File.extname(file)
  when '.heic'
    tag = '-DateTimeOriginal'
  when '.mov'
    tag = '-CreationDate'
  end

  time = Time.strptime(`exiftool #{tag} #{file} | awk '{ print $4 " " $5 }'`, '%Y:%m:%d %H:%M:%S')
  filename = File.basename(file, File.extname(file))
  File.rename(file, time.strftime('%Y-%m-%d--%H-%M-%S') + File.extname(file))
end