0032-利用flask调用摄像头

不念不忘少年蓝@ 2023-01-11 08:39 143阅读 0赞

### index.html ###

<!doctype html>
    <html lang="en">
    <head>
        
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
     
        
        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"
              integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
     
        <title>Live Streaming Demonstration</title>
    </head>
    <body>
    <div class="container">
        <div class="row">
            <div class="col-lg-8  offset-lg-2">
                <h3 class="mt-5">视频显示</h3>
                <img src="{
       { url_for('video_feed') }}" width="100%">
            </div>
        </div>
    </div>
    </body>
    </html>

### app.py ###

#coding:utf-8
    from flask import Flask,render_template,Response
    import cv2
    
    app = Flask(__name__)
    camera = cv2.VideoCapture(0) #use 0 for web camera
    
    # Use Ip Camera/CCTV/RTSP Link
    # cv2.VideoCapture('rtsp://username:password@camera_ip_address:554/user=username_password='password'_channel=channel_number_stream=0.sdp')
    ### Example RTSP Link
    # cv2.VideoCapture('rtsp://mamun:123456@101.134.16.117:554/user=mamun_password=123456_channel=0_stream=0.sdp') ```
    
    def gen_frames(): #generate frame by frame from camera
        while True:
            #capture frame-by-frame
            success,frame = camera.read()
            print('==frame.shape',frame.shape)
            if not success:
                 break
            else:
                ret,buffer = cv2.imencode('.jpg',frame)
                frame = buffer.tobytes()
    
                yield (b'--frame\r\n'
                       b'Content-Type: image/jpeg\r\n\r\n' + frame + b'\r\n')  # concat frame one by one and show result
    
    @app.route('/video_feed')
    def video_feed():
        # Video streaming route. Put this in the src attribute of an img tag
        return Response(gen_frames(), mimetype='multipart/x-mixed-replace; boundary=frame')
    
    
    @app.route('/video', methods=["get"])
    def index():
        """Video streaming home page."""
        return render_template('index.html')
    
    
    if __name__ == '__main__':
        # app.run(debug=True, port=6006)
        app.run(host="0.0.0.0", port=6006)