尝试使用 OpenCV - TypeError：并非所有参数都在字符串格式化期间转换

如何解决尝试使用 OpenCV - TypeError：并非所有参数都在字符串格式化期间转换

我正在关注 YouTube 视频，开始使用我的 Jetson Nano 上的摄像头。这是链接：https://www.youtube.com/watch?v=GQ3drRllX3I 但是，当我启动 python 代码时，我一直面临错误 - TypeError：不是所有参数都在字符串格式化期间转换。代码如下。我已经安装了 Cython 和 Numpy。

  # MIT License
# copyright (c) 2019 JetsonHacks
# See license
# Using a CSI camera (such as the RaspBerry Pi Version 2) connected to a
# NVIDIA Jetson Nano Developer Kit using OpenCV
# Drivers for the camera and OpenCV are included in the base image

import cv2

# gstreamer_pipeline returns a GStreamer pipeline for capturing from the CSI camera
# Defaults to 1280x720 @ 60fps
# Flip the image by setting the flip_method (most common values: 0 and 2)
# display_width and display_height determine the size of the window on the screen


def gstreamer_pipeline(
    capture_width=1280,capture_height=720,display_width=1280,display_height=720,framerate=60,flip_method=0,):
    return (
        "nvarguscamerasrc ! "
        "video/x-raw(memory:NVMM),"
        "width=(int)%d,height=(int)%d,"+
        "format=(string)NV12,framerate=(fraction)%d/1 ! "
        "nvvidconv flip-method=%d ! "
        "video/x-raw,width=(int)%d,format=(string)BGRx ! "
        "videoconvert ! "
        "video/x-raw,format=(string)BGR ! appsink"
        % (
            capture_width,capture_height,framerate,flip_method,display_width,display_height,)
    )


def show_camera():
    # To flip the image,modify the flip_method parameter (0 and 2 are the most common)
    print(gstreamer_pipeline(flip_method=0))
    cap = cv2.VideoCapture(gstreamer_pipeline(flip_method=0),cv2.CAP_GSTREAMER)
    if cap.isOpened():
        window_handle = cv2.namedWindow("CSI Camera",cv2.WINDOW_AUTOSIZE)
        # Window
        while cv2.getwindowProperty("CSI Camera",0) >= 0:
            ret_val,img = cap.read()
            cv2.imshow("CSI Camera",img)
            # This also acts as
            keyCode = cv2.waitKey(30) & 0xFF
            # Stop the program on the ESC key
            if keyCode == 27:
                break
        cap.release()
        cv2.destroyAllWindows()
    else:
        print("Unable to open camera")


if __name__ == "__main__":
    show_camera()