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我有一个带摄像头(黑色)的 Raspberry Pi 3,我在 python 上找到了这个 pi 摄像头模块。因此,当我启动 python 脚本时,我现在拥有一个 Web 服务器,它可以让我看到扔我的相机。很好很酷,但现在我想用一些 php 和 html 制作一个带有两个按钮的表单:

  1. 开始视频,实际上是在 /home/pi/x 的某个地方开始录制视频
  2. Stop Video ,它实际上只停止录制而不是整个流。

这是我的代码

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

PAGE="""\
<?php 
    if(isset($_POST['submit'])){ 
         //code to be executed
        shell_exec("./start_video.sh");
    }else{
         //code to be executed
    }
   if(isset($_POST['submit2'])){
       shell_exec("./stop_video.sh");
   }else{

   }
?>
<html>
<head>
<title>Raspberry Pi - Surveillance Camera</title>
</head>
<body>

<center><h1>Raspberry Pi - Surveillance Camera</h1></center>
<center><img src="stream.mjpg" width="1280" height="720"></center>

<form method="post" action="">
        <input type="submit" name="submit" value="Start Video">
       <input type="submit" name="submit2" value="Stop Video">     
</form>

</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:
         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='1280x720', framerate=30) 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')
        address = ('', 8000)
        server = StreamingServer(address, StreamingHandler)
        server.serve_forever()
    finally:
        camera.stop_recording()
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1 回答 1

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我可能会使用Flask来设置服务器,而不是使用 php 设置基本的 HTTPServer。使用通过 php 调用的 shell 脚本和控制服务器内部的东西不是很优雅,甚至可能不起作用。

这个 Hackster 项目可能是使用烧瓶进行流式传输的一个很好的起点。start_video要开始/停止视频,一种(粗略的)可能性可能是有一个在内部切换并stop_video路由和控制视频馈送是否返回图像的变量。

为了在通过网络服务器流式传输视频的同时录制视频,可能很有用。

于 2021-06-28T12:20:15.540 回答