將 Content-Type 設為 `multipart/x-mixed-replace` 可以讓 server 動態更新圖片 Ex. 攝影機串流 ```python def gen(): while True: frame = VideoCamera.get_camera().get_frame() ret, jpeg = cv2.imencode('.jpg', frame) yield (b'--frame\r\n' b'Content-Type: image/jpeg\r\n\r\n' + jpeg.tobytes() + b'\r\n\r\n') @app.route('/video_feed') def video_feed(): return Response(gen(), mimetype='multipart/x-mixed-replace; boundary=frame') ``` ```html <img src="/video_feed"> ``` Reference: - https://ithelp.ithome.com.tw/articles/10298661