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在raspberry pi上使用Opencv显示视频流时出错

[英]Error displaying video stream using Opencv on raspberry pi

原文 2018-08-02 04:30:43 2 1 python/ python-3.x/ opencv/ raspberry-pi/ raspberry-pi3

I'm trying to access a live video feed from my Raspberry Pi with a PiCam attached. 我正试图通过附加的PiCam从我的Raspberry Pi访问实时视频。 I have enabled the camera in the interface settings and even tested it by snapping some pictures and videos using the PiCam library. 我已经在界面设置中启用了相机，甚至通过使用PiCam库捕捉一些图片和视频进行了测试。 However, OpenCV is giving me troubles. 但是，OpenCV给了我麻烦。 I installed open CV following this tutorial (shoutout to Adrian Rosenbrock). 我按照本教程安装了开放式简历（向Adrian Rosenbrock发送电子邮件）。

Check out the screenshot below for the code and the error message. 查看下面的屏幕截图，了解代码和错误消息。 I'm running everything from within a virtual environment with OpenCV installed, like Adrian suggests. 我正在安装OpenCV的虚拟环境中运行所有内容，就像Adrian建议的那样。

Code and error message 代码和错误消息

VIDEOIO ERROR: V4L: can't open camera by index 0 VIDEOIO ERROR：V4L：无法通过索引0打开相机

From what I've read from other problems people have had, this error is sometimes resolved by playing with the index value. 从我从人们遇到的其他问题中读到的内容，有时通过使用索引值来解决此错误。 If i change the index value to -1 or 1, like most solutions suggest, i either get the same thing or a slightly different "can't access camera" error. 如果我将索引值更改为-1或1，就像大多数解决方案所示，我要么得到相同的东西，要么略有不同“无法访问摄像头”错误。

I'm relatively new to OpenCV and RPi so I might just be missing something simple. 我对OpenCV和RPi比较陌生，所以我可能会错过一些简单的东西。 Any suggestion is much appreciated, thanks! 任何建议都非常感谢，谢谢！

1 个解决方案

You may need to enable access to the camera. 您可能需要启用对相机的访问权限。 Try typing: sudo modprobe bcm2835-v4l2 in terminal on your RPI. 尝试在RPI的终端输入： sudo modprobe bcm2835-v4l2 。