用树莓派搭建一个实时视频监控系统

小雨coding

发布于 2020-06-09 14:19:52

10.2K1

发布于 2020-06-09 14:19:52

文章被收录于专栏：小雨编程

前言

最近在GitHub上发现一个好玩的项目，不用安装其它任何依赖包，只要运行一个Python脚本就可以搭建一个实时视频监控系统。

果断试了一下，确实挺好玩的，现在分享给大家

搭建方法

硬件准备（1）装好系统

首先你得有一个树莓派CSI接口的摄像头和一个装好系统的树莓派。如何安装系统请参考我之前的教程如何给树莓派写入镜像

（2）开启摄像头接口

如果你之前已经使用过摄像头接口，直接看跳到下一步。如果还没有的用过的话，树莓派摄像头接口可能还没有打开，这是树莓派打开摄像头接口的方法：

(i)打开树莓派终端输入：

sudo raspi-config

(ii) 选中Interfacing Options按Enter键进入子菜单

(iii) 选中Camera，按Enter键，打开摄像头接口，确认打开后即可

2. 接入摄像头

给树莓派接上摄像头很容易。确保树莓派已经关机的情况下，用指甲轻轻抠开CSI接口卡扣，将有金属接触面的一面对准卡扣白色的一面，再按压扣紧卡扣就安装好摄像头了。

3. 找到树莓派的IP地址

在树莓派终端输入命令 ipconfig，wlan0即为树莓派的ip地址，比如我这里是 192.168.123.126

4. 下载脚本

GitHub项目地址：（https://github.com/RuiSantosdotme/Random-Nerd-Tutorials/blob/master/Projects/rpicamerasurveillance_system.py）

import io
import picamera
import logging
import socketserver
from threading import Condition
from http import server

PAGE="""\
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<head>
<title>Raspberry Pi - Surveillance Camera</title>
</head>
<body>
<center><h1>Raspberry Pi - Surveillance Camera</h1></center>
<center><h1>小雨的家 Xiaoyu's Home</h1></center>
<center><img src="stream.mjpg" width="640" height="480"></center>
</body>
</html>
"""

class StreamingOutput(object):
    def __init__(self):
        self.frame = None
        self.buffer = io.BytesIO()
        self.condition = Condition()

    def write(self, buf):
        if buf.startswith(b'\xff\xd8'):
            # New frame, copy the existing buffer's content and notify all
            # clients it's available
            self.buffer.truncate()
            with self.condition:
                self.frame = self.buffer.getvalue()
                self.condition.notify_all()
            self.buffer.seek(0)
        return self.buffer.write(buf)

class StreamingHandler(server.BaseHTTPRequestHandler):
    def do_GET(self):
        if self.path == '/':
            self.send_response(301)
            self.send_header('Location', '/index.html')
            self.end_headers()
        elif self.path == '/index.html':
            content = PAGE.encode('utf-8')
            self.send_response(200)
            self.send_header('Content-Type', 'text/html')
            self.send_header('Content-Length', len(content))
            self.end_headers()
            self.wfile.write(content)
        elif self.path == '/stream.mjpg':
            self.send_response(200)
            self.send_header('Age', 0)
            self.send_header('Cache-Control', 'no-cache, private')
            self.send_header('Pragma', 'no-cache')
            self.send_header('Content-Type', 'multipart/x-mixed-replace; boundary=FRAME')
            self.end_headers()
            try:
                while True:
                    with output.condition:
                        output.condition.wait()
                        frame = output.frame
                    self.wfile.write(b'--FRAME\r\n')
                    self.send_header('Content-Type', 'image/jpeg')
                    self.send_header('Content-Length', len(frame))
                    self.end_headers()
                    self.wfile.write(frame)
                    self.wfile.write(b'\r\n')
            except Exception as e:
                logging.warning(
                    'Removed streaming client %s: %s',
                    self.client_address, str(e))
        else:
            self.send_error(404)
            self.end_headers()

class StreamingServer(socketserver.ThreadingMixIn, server.HTTPServer):
    allow_reuse_address = True
    daemon_threads = True

with picamera.PiCamera(resolution='640x480', framerate=24) as camera:
    output = StreamingOutput()
    #Uncomment the next line to change your Pi's Camera rotation (in degrees)
    #camera.rotation = 90
    camera.start_recording(output, format='mjpeg')
    try:
        address = ('', 8000)
        server = StreamingServer(address, StreamingHandler)
        server.serve_forever()
    finally:
        camera.stop_recording()