Issue with IP camera

edit

Hi, i'm trying to detect faces with Haar algorithm from an ip camera but my camera isn't able to broadcast a great videofeed so i decided to just take a picture (.jpg) from the camera each time the code needs it. But the code is'nt working. And i can't find where is the error? The error is :

"error: C:\slave\WinInstallerMegaPack\src\opencv\modules\core\src\array.cpp:2482: error: (-206) Unrecognized or unsupported array type"

Thank's for your help

import numpy as np
import cv2
from datetime import datetime
import cv2.cv as cv
import numpy as np
import os
import time

def detect(img, cascade):
    rects = cascade.detectMultiScale(img, scaleFactor=1.5, minNeighbors=4, minSize=(30, 30), flags = cv.CV_HAAR_SCALE_IMAGE)
    if len(rects) == 0:
        return []
    rects[:,2:] += rects[:,:2]
    return rects

def draw_rects(img, rects, color):
    for x1, y1, x2, y2 in rects:
        print ("###########1##############")

if __name__ == '__main__':
    import sys, getopt
    try: video_src = video_src[2]
    except: video_src = 0
    cascade_fn = 'C:\Opencv24\opencv\data\haarcascades\haarcascade_frontalface_default.xml'
    cascade = cv2.CascadeClassifier(cascade_fn)

    while True:
        tps1= time.clock()
        img = cv2.imread("http://10.0.0.9:8080/shot.jpg",cv2.CV_LOAD_IMAGE_GRAYSCALE) 
        rects = detect(img, cascade)
        draw_rects(gray, rects, (0, 255, 0))
        tps2= time.clock()
        print (1/(tps2-tps1))
        cv2.imshow('Visage',img)
        if 0xFF & cv2.waitKey(5) == 27:
            break
    cv2.destroyAllWindows()