在树莓上执行命令报错，如图
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@veye_xumm 就是按这个页面里面执行的，前面那些都执行了，还是报错
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@xsw 第一个图是运行命令后的截图；第二个是硬件的链接图
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@veye_xumm 已解决；还有一个问题：请问摄像头在工作的时候，是不是临时把视频的信息放置在内存中；我怎么可以读取到视频信息的内存地址？
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@xsw
很好。
硬件是被动的，软件是主动的。
摄像头不能去操作主板的内存，是靠主板上的软件来操作摄像头，把数据放到内存。
树莓派是上我们提供的两种应用模式，都可以由软件获取到摄像头输出的数据。
请参考详细的文档和代码。
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