python opencv mpeg streamer

afficheStream.py

#!/bin/python
#coding : utf-8
import sys, os
import numpy as np
import urllib
import cv2
from datetime import datetime

streamURL = 'http://72.240.51.213/mjpg/video.mjpg'

# Simple printer of a video-stream
def affiche_stream(url):
	stream=urllib.urlopen(url)
	bytes=''
	while True:
		bytes += stream.read(1024)
		a = bytes.find('\xff\xd8')
		b = bytes.find('\xff\xd9')
		if a!=-1 and b!=-1:
			jpg = bytes[a:b+2]
			bytes = bytes[b+2:]
			i = cv2.imdecode(np.fromstring(jpg, dtype=np.uint8), cv2.IMREAD_COLOR)
			cv2.imshow('Stream',i)
			if cv2.waitKey(1)==27:
				exit(0)

# i.e : 
affiche_stream(streamURL)