【树莓派4B测评】树莓派4连接USB摄像头实现网络视频监控
<div class='showpostmsg'><p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">树莓派</span>4<span style="font-family:宋体">本身具有</span>USB<span style="font-family:宋体">接口，还具有千兆网口，</span>CPU<span style="font-family:宋体">的速度也很快，正好可以使用树莓派连接一个</span>USB<span style="font-family:宋体">的摄像头作为网络视频监控，可以查看家里的小孩或老人，或用作查看鱼缸，车位等。</span></span></span></p><p style="text-align:justify"> </p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span lang="EN-US" style="font-size:16.0pt"><span style="font-family:宋体">1</span></span><span style="font-size:16.0pt"><span style="font-family:宋体">，使用lsusb命令查看系统是否支持</span></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">树莓派使用官方的系统，</span>USB<span style="font-family:宋体">摄像头我找的是几十年前的杂牌摄像头，使用</span>lsusb<span style="font-family:宋体">命令查看，系统还是支持这款摄像头的。</span></span></span></p>
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<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span lang="EN-US" style="font-size:16.0pt"><span style="font-family:宋体">2</span></span><span style="font-size:16.0pt"><span style="font-family:宋体">，具体查看</span></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">使用命令查看是</span>video0</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">ls /dev</span></span></p>
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<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span lang="EN-US" style="font-size:16.0pt"><span style="font-family:宋体">3</span></span><span style="font-size:16.0pt"><span style="font-family:宋体">，查看USB摄像头参数</span></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">使用命令</span>(v4l2<span style="font-family:宋体">是字母的</span>l) v4l2-ctl -d /dev/video0 --all</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">可以看到我这款摄像头是</span>640*480<span style="font-family:宋体">分辨率</span></span></span></p>
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<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span lang="EN-US" style="font-size:16.0pt"><span style="font-family:宋体">4</span></span><span style="font-size:16.0pt"><span style="font-family:宋体">，安装motion</span></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">使用命令行安装</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">sudo apt-get install motion</span></span></p>
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<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span lang="EN-US" style="font-size:16.0pt"><span style="font-family:宋体">5</span></span><span style="font-size:16.0pt"><span style="font-family:宋体">，修改配置文件</span></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">sudo nano /etc/motion/motion.conf</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">改为</span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">width 640</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">width 480</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">webcontrol_localhost off</span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">stream_localhost off</span></span></p>
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<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span lang="EN-US" style="font-size:16.0pt"><span style="font-family:宋体">6</span></span><span style="font-size:16.0pt"><span style="font-family:宋体">，运行motion</span></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">输入命令</span>sudo motion<span style="font-family:宋体">开始运行，</span>Ctrl+C<span style="font-family:宋体">退出。</span></span></span></p>
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<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span lang="EN-US" style="font-size:16.0pt"><span style="font-family:宋体">7</span></span><span style="font-size:16.0pt"><span style="font-family:宋体">，局域网web查看</span></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">在</span>PC<span style="font-family:宋体">上输入树莓派的地址，单个摄像头查看端口为</span>8081<span style="font-family:宋体">，多个摄像头或配置端口为</span>8080</span></span></p>
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<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span lang="EN-US" style="font-size:16.0pt"><span style="font-family:宋体">8</span></span><span style="font-size:16.0pt"><span style="font-family:宋体">，外网（广域网）web查看</span></span></span></span></p>
<p style="text-align:justify"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">需要公网</span>IP<span style="font-family:宋体">，需要设置</span>DDNS<span style="font-family:宋体">，还需要在路由器里做设置，有两个方法做设置，一个是将树莓派的</span>IP<span style="font-family:宋体">地址设成</span>dmz<span style="font-family:宋体">主机，另一个是将树莓派的</span>IP<span style="font-family:宋体">地址做端口映射。这里就不详细说明了。</span></span></span></p>
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