python-Flask应用程序，它获取流并将其放在html页面上

我正在尝试创建一个flask应用程序，它接受一个流并将其放在html页面上。

当我使用我的网络摄像头进行测试时，该项目工作正常，但当我连接我的IP摄像头时，出现以下错误：

1、错误

127.0.0.1 - - [08/Jun/2022 19:00:42] "←[37mGET / HTTP/1.1←[0m" 200 -
Debugging middleware caught exception in streamed response at a point where response headers were already sent.
Traceback (most recent call last):
  File "C:\Users\diego\anaconda3\envs\k38\Lib\site-packages\werkzeug\wsgi.py", line 506, in __next__
    return self._next()
  File "C:\Users\diego\anaconda3\envs\k38\Lib\site-packages\werkzeug\wrappers\base_response.py", line 45, in _iter_encoded
    for item in iterable:
  File "C:\Users\diego\codes\videostream\main.py", line 19, in gen
    frame = camera.get_frame()
  File "C:\Users\diego\codes\videostream\face.py", line 33, in get_frame
    ret, jpeg = cv2.imencode('.jpg', frame)
cv2.error: OpenCV(4.5.5) D:\a\opencv-python\opencv-python\opencv\modules\imgcodecs\src\loadsave.cpp:976: error: (-215:Assertion failed) !image.empty() in function 'cv::imencode'
127.0.0.1 - - [08/Jun/2022 19:01:12] "←[37mGET /video_feed HTTP/1.1←[0m" 200 -

1. 主要的py公司

@app.route('/')
def index():
    # rendering webpage
    return render_template('index.html')


def gen(camera):
    while True:
        #get camera frame
        frame = camera.get_frame()
        yield (b'--frame\r\n'
               b'Content-Type: image/jpeg\r\n\r\n' + frame + b'\r\n\r\n')


@app.route('/video_feed')
def video_feed():
    return Response(gen(VideoCamera()),
                    mimetype='multipart/x-mixed-replace; boundary=frame')

2. 照相机py公司

class VideoCamera(object):
    def __init__(self):
       #capturing video
       self.video = cv2.VideoCapture(0)
       #self.video = cv2.VideoCapture(URL, cv2.CAP_FFMPEG)
    
    def __del__(self):
        #releasing camera
        self.video.release()
    
    def get_frame(self):
       #extracting frames
        ret, frame = self.video.read()
 
        #encode OpenCV raw frame to jpg and displaying it
        ret, jpeg = cv2.imencode('.jpg', frame)
        return jpeg.tobytes()

据我所知，IP摄像头的帧变量变为空，我在互联网上寻找解决方案，但迄今为止没有成功。

如果我只是将流强制转换为python shell，它就可以工作，但我的目标是获取流并将其放入html页面中