normalize_sound.rb

normalize_file = "./audio_normalize_results.txt"
system "touch #{normalize_file}"

files_list = Dir["./**/*"]

files_list = files_list.select do |n|
  n.match(/\.mkv$/) ||
  n.match(/\.mp4$/) ||
  n.match(/\.avi$/)
end

files_list_total = files_list.length

puts "#{files_list_total} files to convert"

files_list = files_list.map do |n|
  full_filename = n.gsub(" ", '\ ')
  full_filename = full_filename.gsub("(", '\(')
  full_filename = full_filename.gsub(")", '\)')
  full_filename
end

files_list.each_with_index do |full_filename, index|
  puts "converting file number #{index} of #{files_list_total}"

  match_group = full_filename.match(/(^.+)\/([^\/]+)$/)
  dirname  = match_group[1]
  filename = match_group[2]
  temp_filename = "#{dirname}/_#{filename}"

  puts "mv #{full_filename} #{temp_filename}"

  system "mv #{full_filename} #{temp_filename}"
  result = system "ffmpeg -i #{temp_filename} -af dynaudnorm -vcodec copy #{full_filename} -max_muxing_queue_size 9999"

  if result
    system "echo 'SUCCESS -> #{full_filename}' >> #{normalize_file}"
    system "rm #{temp_filename}"
  else
    system "echo 'FAILURE -> #{full_filename}' >> #{normalize_file}"
  end
end

system "cat #{normalize_file}"