snippet.rb

Signal.trap("CHLD") do
  puts "Child proccses terminated"
end

filename, size, frames, timecode, = "", 0, 0, ""

run_command = "dvgrab -noavc -showstatus testfilm 2>&1"
pipe = nil
threads = []
threads << Thread.new do
  # See http://kpumuk.info/ruby-on-rails/encoding-media-files-in-ruby-using-ffmpeg-mencoder-with-progress-tracking/
  pipe = IO.popen(run_command)
  pipe.each("\r") do |line| # \r allt vilken sträng som helst där...
   if line =~ %r["(\w+[.]\w+)":\s+(.*)\s+MiB\s+(\d+)\s+frames\s+timecode\s+(.*)\s+date]
     #   1. testfilm054.dv
     #   2. 34.06
     #   3. 248
     #   4. 00:27:44.19
     filename, size, frames, timecode = $1, $2, $3, $4
  end
end
end

threads << Thread.new{ loop { Thread.stop unless pipe; sleep 1; puts "Size: #{size} Timecode: #{timecode}"; } }
 
puts "The End..."
puts pipe.inspect
puts pipe.pid
 
sleep 10
puts "About to kill"
Process.kill('HUP', pipe.pid)
pipe.close
#pipe = nil
puts Thread.list.inspect
puts threads.inspect
#threads.each {|thr| thr.join }
#at_exit do
#  threads.each {|thr| thr.join }
#end