#!/usr/bin/env python2
 
 import sys, zmq, cmd
 
 class LavfiCmd(cmd.Cmd):
     prompt = 'lavfi> '
 
     def __init__(self, bind_address):
         context = zmq.Context()
         self.requester = context.socket(zmq.REQ)
         self.requester.connect(bind_address)
         cmd.Cmd.__init__(self)
 
     def onecmd(self, cmd):
         if cmd == 'EOF':
             sys.exit(0)
         print 'Sending command:[%s]' % cmd
         self.requester.send(cmd)
         message = self.requester.recv()
         print 'Received reply:[%s]' % message
 
 try:
     bind_address = sys.argv[1] if len(sys.argv) > 1 else "tcp://localhost:5555"
     LavfiCmd(bind_address).cmdloop('FFmpeg libavfilter interactive shell')
 except KeyboardInterrupt:
     pass