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树莓派3-摄像头-视频软件mjpg-streamer的安装使用

Raspberry Pi 少儿编程 1805浏览 0评论
树莓派3教程

概要

  • "MJPG-streamer",是用于从webcam摄像头采集图像,把他们以流的形式通过基于ip的网络传输到浏览器如Firehox,Cambozola,VLC播放器,Windows的移动设备或者其他拥有浏览器的移动设备。她可以利用某些webcams的硬件压缩功能来降低服务器CPU的开销。她为嵌入式设备和一些常规服务器提供了一个轻量且更少CPU消耗的方案,因为她无需为视频帧压缩浪费大量的计算效率(这件事交给硬件了)。例子是:在一个主频200MHz的路由器上(一个例子是cisco经典无线的linkfs
    WRT54G路由,其可以运行openWRT(迷你linux系统),主频200MHz,4MRAM,16Flash),流编码一个960×720像素的视频,她可以减少10%的cpu使用。
  • 官网,https://sourceforge.net/projects/mjpg-streamer/
  • 官网,https://github.com/jacksonliam/mjpg-streamer

依赖软件

  • libjpeg8
  • cmake

安装

  1. 安装依赖库

安装libjpeg的dev版本(注:下面所有安装过程中出现是否继续时,统一选择继续:Yes)

sudo apt-get install libjpeg8-dev
  1. 下载mjpg-streamer
wget https://codeload.github.com/jacksonliam/mjpg-streamer/zip/master
mv master mjpg-streamer-master.zip

或者直接到网站下载zip安装包mjpg-streamer-master.zip,使用unzip mjpg-streamer-master.zip解压

  1. 编译mjpg-streamer
  • 安装cmake

    sudo apt-get install cmake

  • 切换到mjpg的路径下

    cd ~/mjpg-streamer-master/mjpg-streamer-experimental
    sudo make clean all

  1. 安装mjpg-streamer

    sudo cp mjpg_streamer /usr/local/bin
    sudo cp output_http.so input_uvc.so /usr/local/lib/
    sudo cp -R www /usr/local/www

用法介绍

pi@raspberrypi:~ $ mjpg_streamer --help
-----------------------------------------------------------------------
Usage: mjpg_streamer
  -i | --input "<input-plugin.so> [parameters]"
  -o | --output "<output-plugin.so> [parameters]"
 [-h | --help ]........: display this help
 [-v | --version ].....: display version information
 [-b | --background]...: fork to the background, daemon mode
-----------------------------------------------------------------------
Example #1:
 To open an UVC webcam "/dev/video1" and stream it via HTTP:
  mjpg_streamer -i "input_uvc.so -d /dev/video1" -o "output_http.so"
-----------------------------------------------------------------------
Example #2:
 To open an UVC webcam and stream via HTTP port 8090:
  mjpg_streamer -i "input_uvc.so" -o "output_http.so -p 8090"
-----------------------------------------------------------------------
Example #3:
 To get help for a certain input plugin:
  mjpg_streamer -i "input_uvc.so --help"


-----------------------------------------------------------------------
In case the modules (=plugins) can not be found:
 * Set the default search path for the modules with:
   export LD_LIBRARY_PATH=/path/to/plugins,
 * or put the plugins into the "/lib/" or "/usr/lib" folder,
 * or instead of just providing the plugin file name, use a complete
   path and filename:
   mjpg_streamer -i "/path/to/modules/input_uvc.so"
-----------------------------------------------------------------------

启动mjpg_streamer

  • 方法1

    LD_LIBRARY_PATH=/usr/local/lib mjpg_streamer -i "input_uvc.so" -o "output_http.so -w /usr/local/www"

  • 方法2

    LD_LIBRARY_PATH=/usr/local/lib mjpg_streamer -i "./input_uvc.so -d /dev/video0 -r 320*240 -f 12" -o " ./output_http.so –p 8090 –w /usr/local/www "

  • 方法3

或者添加到path路径export LD_LIBRARY_PATH=/opt/mjpg-streamer/

(-r后是分辨率参数,-f后面是帧率,请根据您的摄像头参数进行调整)8090可以自己定义

查看效果

在浏览器http://:8080 打开监控界面

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