save audio stream to .m4a file using VLC

vlc_d100.rb

require 'uri'
require 'pp'
require 'pathname'

url = URI('http://66.55.135.155:8000/Channel1')

##### VLC #####
stop_time = ARGV.shift # duration in secords
abort 'no stop tiime defined' unless stop_time

visible   = true
vlc_path  = Pathname('c:/usr/bin/VLC')
vlc       = visible ? vlc_path + 'vlc.exe' : vlc_path + 'cvlc.exe'
###############

##### target file #####
target_dir = File.join('c:', 'usr')
stream_tag = 'Singtao'
savedir    = Pathname(File.join(target_dir, Time.now.strftime('%Y%m%d')))
filename   = savedir + Time.now.strftime("#{stream_tag}_%Y%m%d_%H%M%S.m4a")
##### target file #####

savedir.mkpath
pp cmd = "#{[vlc.to_s, url.to_s, '--sout', "file/mp4:#{filename}", "--stop-time=#{stop_time}", 'vlc://quit'].join(' ')}"
`#{cmd}`