树莓派换国内源+安装mjpj-streamer+安装python-opencv

1、树莓派换国内源：参考

 https://blog.csdn.net/zd_nupt/article/details/79529775 

2、安装mjpj-streamer：参考

 https://jingyan.baidu.com/article/47a29f2474a555c01523994c.html

最后测试的时候在树莓派的/home/pi目录下新建一个cam_setup.py,代码如下：

import os
import time
os.system('/home/pi/Downloads/mjpg-streamer/mjpg-streamer-experimental/mjpg_streamer -i "/home/pi/Downloads/mjpg-streamer/mjpg-streamer-experimental/input_uvc.so -r 320x240" -o "/home/pi/Downloads/mjpg-streamer/mjpg-streamer-experimental/output_http.so -w /home/pi/Downloads/mjpg-streamer/mjpg-streamer-experimental/www "')

安装的mjpg-streamer文件夹一定要放在Downloads/路径下。然后打开命令行，输入python cam_setup.py,然后回车即可。就可以看到一长串如下图所示的输出，就表明成功了。

3、安装python-opencv

在命令行中直接输入：

sudo apt-get install python-opencv