无法通过flask-socketIO服务器在HTML客户端中显示来自python客户端的视频流

<video id="videoElement" autoplay></video>

var socket = io.connect('服务器地址');

socket.on('video_stream', function(data) {
  var videoElement = document.getElementById('videoElement');
  videoElement.src = 'data:video/mp4;base64,' + data;
});

from flask import Flask, render_template
from flask_socketio import SocketIO, emit
import cv2
import base64

app = Flask(__name__)
socketio = SocketIO(app)

@socketio.on('connect')
def test_connect():
    print('Client connected')

@socketio.on('disconnect')
def test_disconnect():
    print('Client disconnected')

@socketio.on('video_stream')
def handle_video_stream(image):
    # 处理视频流数据
    # 这里使用OpenCV将图像转换为Base64编码的字符串
    _, buffer = cv2.imencode('.jpg', image)
    image_base64 = base64.b64encode(buffer).decode('utf-8')

    # 发送视频流数据给HTML客户端
    emit('video_stream', image_base64)

if __name__ == '__main__':
    socketio.run(app)