import cv2

camera = cv2.VideoCapture(0)
fps = cv2.CAP_PROP_FPS

video = cv2.VideoWriter('video.mp4', cv2.VideoWriter_fourcc(*'mp4v'), 30, (640, 480))

while True:
    _, frame = camera.read()

    video.write(frame)

    cv2.imshow("Frame", frame)
    c = cv2.waitKey(1)

    if c == ord('q'):
        break

video.release()
camera.release()