makes glitch beats using AviGlitch

b.rb

require 'aviglitch'
unless ARGV.size >= 2
  puts "Usage: ruby #{$0} INFILE PATTERN [FPS]"
  puts "       ruby #{$0} file.mp3 0010001000010011"
  exit
end
infile, pattern, fps = ARGV
fps = 60 unless fps

cmd = "ffmpeg -i %s -sameq -r %d -vn tmp1.avi" % [infile, fps]
system cmd
a = AviGlitch.open 'tmp1.avi'
a.glitch_with_index do |f, i|
  if pattern[i % pattern.size] == '1'
    f.gsub /\w/, '1'
  else
    f
  end
end
a.output 'tmp2.avi'
outfile = 'out' + Pathname(infile).extname

cmd = "ffmpeg -i tmp2.avi -sameq -y %s" % outfile
system cmd

Dir.glob('tmp*.avi').each {|f| File.unlink f }