2440 ARM开发板移植Motion网络监控系统

移植环境(红色粗字体字为修改后内容，蓝色粗体字为特别注意内容)
1，开发板：韦东山JZ2440
2，linux 版本：linux-3.4.2
3，系统版本：Ubuntu9.10
4，交叉编译环境：arm-linux-gcc-4.4.3
5，参考文献：https://blog.csdn.net/kangear/article/details/8763790

Motion这个工具非常适合用来做一般的嵌入式移动监控，为什么呢？主要有以下几点：

1、依赖很少，编译过程一般不会出现什么问题。

2、兼容性好，基本原理就是单张jpg图片叠加显示，这在任何浏览器上都通用。不像其他视频流媒体，对客户端要求较高。
3、对摄像头要求不够，只需要一般的UVC摄像头，Kernel中编译了v4L2之后就能够正常工作。

Stpe1，将UVC摄像头插入USB，确保/dev/下面多一个video设备

lsusb
Bus 001 Device 003: ID 058f:0362

红字部分表示识别出了uvc摄像头。

Step2，到官网下载Motion3.2.11.1，注意版本不要弄错，http://sourceforge.net/projects/motion/files/motion%20-%203.2/

Step3，解压缩，编译过程如下：

./configure  --prefix=${PWD}/_install  --host=arm-linux --without-ffmpeg

make

make install

Step4，下载到板子，新建配置文件motion.conf，内容如下：

# Minimal motion example config file provided by the
# Debian motion package - for basic webcam operation.
#
# You most certainly want to investigate
# /usr/share/doc/motion/examples/motion-dist.conf.gz
# for further configuration options. Also, refer to the
# motion man page and /usr/share/doc/motion/motion_guide.html
# for detailed information on configuration options.

daemon off

quiet on

locate on

# You may very well need to change this (check with 'dmesg'
# after plugging in your webcam).

videodevice /dev/video0

# Image size in pixels (valid range is camera dependent).

width 320

height 240

framerate 25

quality 85

auto_brightness off

# General threshold level and noise threshold
# level (for distinguishing between noise and motion).

threshold_tune off

threshold 4500

noise_level 64

# Initial brightness, contrast, hue (NTSC), and saturation.
# 0 = disabled (valid range 0-255).

brightness 0

contrast 0

saturation 0

hue 0

# Encode movies in real-time (install ffmpeg before enabling).

ffmpeg_cap_new on

# Codec to be used by ffmpeg for the video compression.
# Supported formats: mpeg4, msmpeg4.

ffmpeg_video_codec msmpeg4

# Target base directory for pictures and films (you may need
# to change this (or change its permissions) depending on
# which system user runs motion).

target_dir /root/motion/snapshots

# Define a port number (e.g. 8000) to enable the mini-http server.

# 0 = disabled.

webcam_port 8081

# Set to 'off' to allow anybody (not just localhost) to view the
# webcam via the mini-http server (http://hostname:port).
webcam_localhost off
snapshot_interval 1
snapshot_filename snapshot
webcam_quality 50
webcam_maxrate 8
#on_event_start /root/motion/on_motion_detected
#on_event_end /root/motion/on_motion_end
gap 10

Step5，运行，./motion -c motion.conf，然后浏览器输入http://192.168.137.9:8081/就能够看到视频监控。

注意，配置文件中，如果指定的videodevice设备不正确，可能会显示彩条