ds_cam.py

import cv2

cam = cv2.VideoCapture(0 + cv2.CAP_DSHOW)
cam.set(cv2.CAP_PROP_FRAME_WIDTH, 1280)
cam.set(cv2.CAP_PROP_FRAME_HEIGHT, 720)
cam.set(cv2.CAP_PROP_CONVERT_RGB, 0)

try:
    print("Starting video. Press CTRL+C to exit.")
    while True:
        ret_val, im = cam.read()
        bRGGB = cv2.convertScaleAbs(im, 0.249023)
        BGRim = cv2.cvtColor(bRGGB, cv2.COLOR_BayerRG2BGR)

        cv2.imshow("example", BGRim)
        cv2.waitKey(1)
except KeyboardInterrupt:
    cv2.destroyAllWindows()

# release camera
cam = cam.release()