Flask video stream using OpenCV images

for accessing camera other than your laptop's webcam, you can use RTSP link like this rtsp://admin:12345@192.168.1.1:554/h264/ch1/main/av_stream"

where

>        username:admin>         password:12345>         your camera ip address and port>         ch1 is first camera on that DVR

replace cv2.VideoCamera(0) with this link like this for your camera and it will work

camera.py

import cv2class VideoCamera(object):    def __init__(self):        # Using OpenCV to capture from device 0. If you have trouble capturing        # from a webcam, comment the line below out and use a video file        # instead.        self.video = cv2.VideoCapture(0)        # If you decide to use video.mp4, you must have this file in the folder        # as the main.py.        # self.video = cv2.VideoCapture('video.mp4')    def __del__(self):        self.video.release()    def get_frame(self):        success, image = self.video.read()        # We are using Motion JPEG, but OpenCV defaults to capture raw images,        # so we must encode it into JPEG in order to correctly display the        # video stream.        ret, jpeg = cv2.imencode('.jpg', image)        return jpeg.tobytes()

main.py

from flask import Flask, render_template, Responsefrom camera import VideoCameraapp = Flask(__name__)@app.route('/')def index():    return render_template('index.html')def gen(camera):    while True:        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')if __name__ == '__main__':    app.run(host='0.0.0.0', debug=True)

then you can follow this blog to increase your FPS

https://www.pyimagesearch.com/2015/12/21/increasing-webcam-fps-with-python-and-opencv/