Stream a video to an Apple TV.

airplay.rb

#!/opt/boxen/rbenv/shims/ruby
# You need these gems, set your host on the lan
# plus use the correct ruby path above.
# Also install the puma gem.
# You need to launch this with the FULL path to the video file.
require 'sinatra'
require 'airplay'
require 'socket'

VIDEO = ARGV[0]
LANHOST = "192.168.2.136:4567"

# For best results, go to TorrentCell.m in Transmission and replace final
# `if (fMouseDownRevealButton)` case to be:
# NSString *path = @"/opt/boxen/rbenv/shims/ruby";
# NSArray *args = @[@"/usr/local/bin/airplay.rb", location];
# [NSTask launchedTaskWithLaunchPath:path arguments:args];
# instead of revealing in Finder.

# from stackoverflow
def local_ip
  orig, Socket.do_not_reverse_lookup = Socket.do_not_reverse_lookup, true

  UDPSocket.open do |s|
    s.connect '64.233.187.99', 1
    s.addr.last
  end
ensure
  Socket.do_not_reverse_lookup = orig
end

configure do
  set :server, :puma
  set :bind, '0.0.0.0'
  mime_type :video, "video/mp4"
end

fork do
  airplay = Airplay::Client.new
  airplay.send_video("http://#{LANHOST}/video.mp4")
  while true
    sleep 5 # MAGIC!
    if airplay.scrub["duration"] == 0
      puts "Finished Playing"
      exit
    end
  end
end

get '/video.mp4' do
  content_type :video
  send_file VIDEO
end