capture from video

video_cap.py

import cv2
import sys
import numpy as np
import imutils

vids = [0] if len(sys.argv) < 2 else map(int, sys.argv[1].split(','))
caps = [cv2.VideoCapture(_) for _ in vids]

scale = .5

for cap in caps:
    cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1920)
    cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 1080)


while True:
  for k, cap in enumerate(caps):
    ret, im = cap.read()
    if not ret:
        break

    print im.shape
    h, w, c = im.shape
    im[:h:h/2, :, :] = 255
    im[:, :w:w/2, :] = 255
    cv2.circle(im, (w/2, h/2), 770, (0,0,255))
    cv2.circle(im, (w/2, h/2), 800, (0,0,255))

#    cv2.circle(im, (w/2, h/2), h/2 + 100, (0,0,255))
#    cv2.circle(im, (w/2, h/2), h/2 + 200, (0,0,255))
#    cv2.circle(im, (w/2, h/2), h/2 + 300, (0,0,255))
#    cv2.circle(im, (w/2, h/2), h/2 + 400, (0,0,255))
#    im = imutils.rotate_bound(im, 270)
    cv2.imshow('test_%d' % k, cv2.resize(im, None,None,fx=scale,fy=scale))

  pk = cv2.waitKey(1)
  if pk & 0XFF == 113:
      break