Recursively scans the supplied director and prints filenames alongside bitrates

bitrate_scanner.rb

#!/usr/bin/ruby

# Recursively scans the supplied director and prints filenames alongside
# bitrates
# Usage: 
# ./bitrate_scanner.rb path/to/folder/to/scan/recursively

# [sudo] gem install ruby-audioinfo
require "audioinfo"

def print_header(file)
  dirname = File.dirname(file)
  if @olddirname != dirname
    separator = "=" * dirname.length
    puts "\n\n\n#{separator}\n#{dirname}\n#{separator}\n\n"
    @olddirname = dirname
  end
end

def scan_folder(path)
  Dir.glob("#{path}/**/*.{m4a,mp3}") do |file|
    print_header(file)
    AudioInfo.open(file) do |info|
      filename = File.basename(file)
      puts "#{filename} ( #{info.bitrate} kbps )"
    end
  end
end

@olddirname = ""
path = ARGV[0].chomp("/")
scan_folder(path)