很多人找不到怎么下载,其实之前ffmpeg可以通过cvs下载,不过最近他已经换成了更加强大的svn
如何使用SVN我这里不再介绍,网上还有大量的安装和使用的文章可以借鉴,这里简单罗列几个SVN辅助的软件:
SubVersion,从 http://subversion.tigris.org/ 下载,支持linux,我们这里就装这个
TortoiseSVN,从 http://tortoisesvn.tigris.org/ 下载,是很不错的SVN客户端程序,为windows外壳程序集成到windows资源管理器和文件管理系统的Subversion客户端,用起来很方便,commit动作变得就像Winrar右键压缩一样方便。
ok,那我们先装subversion,记住最好之前装过apr和apr-util,在apache.org网站能下到
wget http://subversion.tigris.org/downloads/subversion-1.3.2.tar.gz
tar zvxf subversion-1.3.2.tar.gz
cd subversion-1.3.2
./configure --with-apr=/usr/local/apr-httpd --with-apr-util=/usr/local/apr-util-httpd/
make
make install
到此,我们就可以通过svn命令获取最新的ffmpeg了
svn checkout svn://svn.mplayerhq.hu/ffmpeg/trunk ffmpeg
你会发现在你所在的目录,自动出现一个ffmpeg的目录,就是你下载的源代码。
2.下面是ffmpeg的编译
./configure --enable-libogg --enable-shared --enable-gpl
(一定要加上 --enable-shared,不然OpenCV找不到ffmpeg库)
================================================
2006-10-3
1.
下载:opencv-0.9.9.tar.gz
http://puzzle.dl.sourceforge.net/sourceforge/opencvlibrary/opencv-0.9.9.tar.gz
2.
#tar -xzvf opencv-0.9.9.tar.gz
3.
#./configure --with-quicktime=no --with-ffmpeg
(OpenCV默认用quicktime打开视频文件,我把他改成ffmpeg)
4.
#make
5.
#make install
6.
相关配置
修改/etc/ld.so.conf
添加一行/usr/local/lib
# ldconfig (root用户)
然后将/usr/local/lib/pkgconfig中的opencv.pc 拷贝到/usr/lib/pkgconfig中,(如果不做这步,根本编译不起)
可以采用这个操作
# cp /usr/local/lib/pkgconfig/opencv.pc /usr/lib/pkgconfig
7.
编辑opencv程序的方法
以编辑cvtest.c文件为例子(因为highgui中采用了c++,所以一定要用g++编译才可以)
A. g++ `pkg-config --cflags opencv` -o cvtest cvtest.c `pkg-config --libs opencv`
B. 编译: g++ `pkg-config --cflags opencv` -c cvtest.c
链接: g++ `pkg-config --libs opencv` -o cvtest cvtest.o
=====================================================
2006-10-3
例子:
/**************************************************
* 背景建模,运动物体检测
*
**************************************************/
/***********************************************************************
* OpenCV example
* Copyright (C) 2006 Shiqi Yu
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
***********************************************************************/
#include
#include
#include
#include
int main( int argc, char** argv )
{
//声明IplImage指针
IplImage* pFrame = NULL;
IplImage* pFrImg = NULL;
IplImage* pBkImg = NULL;
CvMat* pFrameMat = NULL;
CvMat* pFrMat = NULL;
CvMat* pBkMat = NULL;
CvCapture* pCapture = NULL;
int nFrmNum = 0;
//创建窗口
cvNamedWindow("video", 1);
cvNamedWindow("background",1);
cvNamedWindow("foreground",1);
//使窗口有序排列
cvMoveWindow("video", 30, 0);
cvMoveWindow("background", 360, 0);
cvMoveWindow("foreground", 690, 0);
if( argc != 2 )
{
fprintf(stderr, "Usage: bkgrd
return -1;
}
//打开视频文件
if( !(pCapture = cvCreateFileCapture(argv[1])))
{
fprintf(stderr, "Can not open video file %s\n", argv[1]);
return -2;
}
//逐帧读取视频
while(pFrame = cvQueryFrame( pCapture ))
{
nFrmNum++;
//如果是第一帧,需要申请内存,并初始化
if(nFrmNum == 1)
{
pBkImg = cvCreateImage(cvSize(pFrame->width, pFrame->height), IPL_DEPTH_8U,1);
pFrImg = cvCreateImage(cvSize(pFrame->width, pFrame->height), IPL_DEPTH_8U,1);
pBkMat = cvCreateMat(pFrame->height, pFrame->width, CV_32FC1);
pFrMat = cvCreateMat(pFrame->height, pFrame->width, CV_32FC1);
pFrameMat = cvCreateMat(pFrame->height, pFrame->width, CV_32FC1);
//转化成单通道图像再处理
cvCvtColor(pFrame, pBkImg, CV_BGR2GRAY);
cvCvtColor(pFrame, pFrImg, CV_BGR2GRAY);
cvConvert(pFrImg, pFrameMat);
cvConvert(pFrImg, pFrMat);
cvConvert(pFrImg, pBkMat);
}
else
{
cvCvtColor(pFrame, pFrImg, CV_BGR2GRAY);
cvConvert(pFrImg, pFrameMat);
//高斯滤波先,以平滑图像
//cvSmooth(pFrameMat, pFrameMat, CV_GAUSSIAN, 3, 0, 0);
//当前帧跟背景图相减
cvAbsDiff(pFrameMat, pBkMat, pFrMat);
//二值化前景图
cvThreshold(pFrMat, pFrImg, 60, 255.0, CV_THRESH_BINARY);
//进行形态学滤波,去掉噪音
//cvErode(pFrImg, pFrImg, 0, 1);
//cvDilate(pFrImg, pFrImg, 0, 1);
//更新背景
cvRunningAvg(pFrameMat, pBkMat, 0.003, 0);
//将背景转化为图像格式,用以显示
cvConvert(pBkMat, pBkImg);
//显示图像
cvShowImage("video", pFrame);
cvShowImage("background", pBkImg);
cvShowImage("foreground", pFrImg);
//如果有按键事件,则跳出循环
//此等待也为cvShowImage函数提供时间完成显示
//等待时间可以根据CPU速度调整
if( cvWaitKey(2) >= 0 )
break;
}
}
//销毁窗口
cvDestroyWindow("video");
cvDestroyWindow("background");
cvDestroyWindow("foreground");
//释放图像和矩阵
cvReleaseImage(&pFrImg);
cvReleaseImage(&pBkImg);
cvReleaseMat(&pFrameMat);
cvReleaseMat(&pFrMat);
cvReleaseMat(&pBkMat);
return 0;
}