linux v4l2 开发笔记

jpeg库 安装

缺少libjpeg 错误
fatal error: jpeglib.h: No such file or directory
解决方法
Ubuntu Software Center -> search -> libjpeg -> install libjpeg8-dev

yuv查看工具

sudo apt-get install imagemagick
convert -size widthxheight input.yuv output.bmp 

v4l2grab

This is a small command line utility for grabbing JPEGs form V4L2 devices (e.g. USB webcams).

v4l2grap 代码，依赖包安装，v4l2grap 用于在v4l2的基础上使用摄像头拍摄照片，编译成功后，使用下面的命令拍摄照片

./v4l2grap -o image.jpg

 1. Install the required libraries (libv4l and libjpeg) and autotools
	 sudo apt-get install libjpeg8-dev libv4l-dev autoconf automake libtool

 2. Clone the repository
	git clone https://github.com/twam/v4l2grab.git
 
 3. Creating autotools files
	./autogen.sh
 
 4. Run configure
	./configure
 
 5. Run make
	make
 
 6. Run make install
	sudo make install
 

安装方法，参照地址

https://github.com/twam/v4l2grab/tree/master <--- 源码

https://github.com/twam/v4l2grab/wiki/Installation <--- 安装方法