Use contours in a video?

edit

This is the program I use for drawing all the contours around an image

                import numpy as np
                import cv2
                im = cv2.imread('test.jpg')
                imgray = cv2.cvtColor(im,cv2.COLOR_BGR2GRAY)
                ret,thresh = cv2.threshold(imgray,127,255,0)
                im2, contours, hierarchy = cv2.findContours(thresh,cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE)

For drawing contours in a video, I use this program.

                import cv2
                cap = cv2.VideoCapture(0)
                while True:
                          ret,frame=cap.read()
                          gray = cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)
                          ret,thresh = cv2.threshold(gray,140,255,0)
                          image,contours,hie = cv2.findContours(thresh,cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE)
                          frame = cv2.drawContours(frame, contours, 3, (0,255,0), 3)
                          cv2.imshow("vid",frame)
                          if cv2.waitKey(1) & 0xFF == ord('q'):
                                           break

cap.release() cv2.destroyAllWindows()

Now the problem is that when I run the second program, there are multiple errors

1-> Need more than 2 values to unpack.

2-> When I remove the image parameter from the findContours(), and try to display, it still gives me an error.

Can someone please explain to me why this is happening?

Thanks in advance! :)