Prep pictures for display on a VIEWline widescreen digital picture frame

digital_picture_frame.rb

# Prep pictures for display on a VIEWline widescreen digital picture frame
# - The file types Google Photo dumped out: heic, mov, jpg, mp4
# - To check that you don't have any others: 
#   > Dir.entries('.').reject{|f| f.start_with? '.'}.map(&:downcase).map{|f| File.extname f}.uniq
# - Recommend doing orientation adjustments before exporting

require 'mini_magick'
require 'securerandom'

files = Dir.entries('.').select do |file| 
	['.jpg','.heic'].any? {|ext| file.downcase.end_with? ext}
end

# the resolution of the picture frame
width, height = 480, 234

files.each_with_index do |file,index|
	puts "Processing #{index}: #{file} ..."

	image = MiniMagick::Image.open(file)
	geometry = image.data["pageGeometry"]

	# resize to picture frame resolution
	image.resize "480x234"

	# the frame only accepts jpgs
	image.format 'jpg'	

	# save to the picture frame's SD card
	# I'm using a random UUID so that pictures appear in a random order
	# I could just shuffle then assign a one-up counter, but I want to 
	image.write(File.join('/Volumes/PICTURES/',SecureRandom.uuid)+".jpg")
end