FRAME_WIDTH = 1280
FRAME_HEIGHT = 720
def writeVideo(dir_path, fps, out_video_name):
    fourcc = cv2.VideoWriter_fourcc(*'MJPG')
    videoWriter = cv2.VideoWriter(out_video_name, fourcc, fps, (FRAME_WIDTH, FRAME_HEIGHT))
    img_list = os.listdir(dir_path)
    for img in img_list:
        print('cur img:' + img)
        img12 = cv2.imread(os.path.join(dir_path, img))
        videoWriter.write(img12)
    videoWriter.release()