using_videodir.py 文件源码

def backend(self):
        while True:
            if self.vcap is not None:
                pos=int(v.get(cv.CV_CAP_PROP_POS_FRAMES))
                ret,image=self.vcap.read()
                if ret:
                    self.image=image.copy()
                else:
                    print 'read fail: '+self.vurl
                    self.vcap=None
            time.sleep(1.0/self.fps)