如何使用motion实现网络视频监控

pcDuino8 Uno+USB摄像头+开源工具，几分钟搞定远程视频监控！

准备

硬件

OpenCV computer vision kit

软件

预安装了OpenCV的Ubuntu 14.04

实现步骤

1. 安装软件

$ sudo apt-get update
$ sudo apt-get install motion

2. 修改配置文件

$ sudo vim /etc/motion/motion.conf
$ chmod 777 /media

需要确认下面这些参数：

daemon on #default off (This allows the motion to run in the background)

framerate 10 #default 2 (increased framerate)

width 640 #default 320 (changed width to match that of the webcam)

height 480 #default 240 (same as above but for height)

threshold 2000 #default 1500 (*explained in detail below)

pre_capture 2 #default 0 (captures 2 frames before motion was detected and adds that to the videos to make them smoother)

post_capture 5 #default 0 (same as above but captures frames after)

output_normal off #default on (this disables storing images, since we only require video)

ffmpeg_video_codec msmpeg4 #default swf (msmpeg4 is accepted by windows media player, hence easier to play on Windows)

target_dir /mnt/motionvideos #default /tmp/motion (changed the directory where videos will be stored)

webcam_maxrate 5 #default 1 (increase the max framerate on lie stream)

webcam_localhost off #default on (allows you to set up a live stream of the webcam)

注意：上面的部分参数需要根据你的摄像头实际参数进行设置

3. 创建目录

我们需要根据上面的target_dir创建一个目录：

$ sudo mkdir /mnt/motionvideos
$ sudo chown motion /mnt/motionvideos

4. 修改默认的配置文件，允许后台启动

$ sudo vi /etc/default/motion

将其中的start_motion_daemon= no 修改成 yes 。

5. 插入USB摄像头，确认系统可以识别

$ ls /dev/video0

6. 启动服务

ubuntu@RPI:~$ sudo service motion start
 * Starting motion detection daemon motion       [ OK ]

如果要关闭服务，可运行：

$ sudo service motion stop

测试

pcDuino8 Uno接入局域网，获得IP地址。在同一局域网中的一台电脑或手机上，浏览器访问： < pcDuino8 Uno IP Address>:8081

可看到摄像头播放的视频：

camera

更多配置信息，见参考链接。