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基于opencv网络摄像头在ubuntu下的视频获取

1 工具原料

平台：UBUNTU12.04

安装库 Opencv-2.3

2 安装编译运行步骤

安装编译opencv-2.3 参考http://blog.csdn.net/xiabodan/article/details/23547847

提前下载OPENCV源码包

官方：http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/

 我的：http://download.csdn.net/detail/xiabodan/7176253

2

sudo apt-get update

sudo apt-get upgrade

sudo apt-get install build-essential libgtk2.0-dev libjpeg-dev libtiff4-dev libjasper-dev libopenexr-dev cmake python-dev python-numpy python-tk libtbb-dev libeigen2-dev yasm libfaac-dev libopencore-amrnb-dev libopencore-amrwb-dev libtheora-dev libvorbis-dev libxvidcore-dev libx264-dev libqt4-dev libqt4-opengl-dev sphinx-common texlive-latex-extra libv4l-dev libdc1394-22-dev libavcodec-dev libavformat-dev libswscale-dev

解压源码包

`3`	`tar` `-xvf OpenCV-2.4.1.tar.bz2`

`4`	`cd` `OpenCV-2.4.1`

`1`	`mkdir` `build` `cmake配置MAKEFILE`

`2`	`cd` `build`

`3`	`cmake -D WITH_TBB=ON -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=ON -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON -D WITH_QT=ON -D WITH_OPENGL=ON ..`

然后进行make

1 make

`2`	`sudo` `make` `install`

配置opencv

`1`	`sudo` `gedit /etc/ld.so.conf.d/opencv.conf`

Add the following line at the end of the file(it may be an empty file, that is ok) and then save it: 在opencv.conf中添加以下路径

1

/usr/local/lib

sudo ldconfig

`1`	`sudo` `gedit /etc/bash.bashrc`

Add these two lines at the end of the file and save it: 在bash.bashrc中添加以下环境变量

1

PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig

2

export PKG_CONFIG_PATH

sudo reboot 重启电脑

注意：一定要提前安装V4L等等库,不然编译能过，运行的时候没有画面。

3 测试代码

编译

g++ cameraCaptrue.cpp  -o  cameraCap `pkg-config --libs --cflags opencv`

生成文件cameraCap

运行采集成功

./cameraCap

cameraCaptrue.cpp

#include<stdio.h>
#include<math.h>
#include "highgui.h"
#include <cv.h>
#include <opencv2/opencv.hpp>
#include <opencv2/highgui/highgui.hpp>

//#include <cvaux.h>
//#include <highguihighgui_c.h>
//#include <core	ypes_c.h>
//#include <photophoto_c.h>
//#include <imgprocimgproc_c.h>
//#include <photophoto

using namespace cv;


int main( int argc, char** argv )
{
	printf("I am start 
");
	VideoCapture cap(0); // open the default camera
	if(!cap.isOpened())  // check if we succeeded
		return -1;

	printf("%f, %f
",cap.get(CV_CAP_PROP_FRAME_WIDTH),cap.get(CV_CAP_PROP_FRAME_HEIGHT));
	cap.set(CV_CAP_PROP_FRAME_WIDTH, 320);
	cap.set(CV_CAP_PROP_FRAME_HEIGHT, 240);
	cap.set(CV_CAP_PROP_FPS, 15);
	printf("%f, %f
",cap.get(CV_CAP_PROP_FRAME_WIDTH),cap.get(CV_CAP_PROP_FRAME_HEIGHT));
	Mat src_gray;
	cvNamedWindow( "video", CV_WINDOW_AUTOSIZE );

	while(1)
	{
		Mat frame;
		cvWaitKey(10);
		cap >> frame;
		imshow("video", frame);
	}


	return 0;
}