Image converter with using threads

convert_avif_to_jpeg.rb

require 'mini_magick'
require 'thread'

# Maximum number of worker threads
max_threads = 10

# Queue for AVIF files
queue = Queue.new
Dir["avif_thumbnails/*.avif"].each { |avif_file| queue << avif_file }

# Worker threads
workers = max_threads.times.map do
  Thread.new do
    while (avif_file = queue.pop(true) rescue nil)
      jpeg_file = "jpeg_thumbnails/#{File.basename(avif_file, '.avif')}.jpeg"
      image = MiniMagick::Image.open(avif_file)
      image.format "jpeg"
      image.write jpeg_file
      puts "Converted #{avif_file} to #{jpeg_file}"
    end
  end
end

# Wait for all worker threads to finish
workers.each(&:join)