OpenCV数字图像处理七：将视频帧变成图像保存下来

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#include <cv.h>
#include <highgui.h>
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"


using namespace std;
using namespace cv;


//定义文件夹下视频的数量
#define NumVideo 4


#define WidthResize 300
#define HeightResize 180




int main()
{
CvSize size;
FILE *fp;
if((fp=fopen("..\\dstAbsGray.txt","w"))==NULL)
{
printf("can not open the neuron file\n");
exit(0);
}


//初始化一个视频文件捕捉器
char *video_name = NULL;
CvCapture* capture;
video_name = (char*)malloc(50*sizeof(char)); //动态分配内存
for(int jj=1; jj<=NumVideo; jj++)
{
int i=0; //视频读取标志标志
printf("\n第%d段视频\n",jj);


sprintf_s(video_name, 50, "..\\video\\%d.avi",jj);//保存的图片名
capture = cvCaptureFromAVI(video_name);
// CvCapture* capture = cvCaptureFromAVI("..\\video\\4.avi");
if( capture == NULL )
{
printf("视频文件打开失败！！");
continue;
}

int frameH    = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_HEIGHT);
int frameW    = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH);
int fps       = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FPS);
int numFrames = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_COUNT);
printf("\tvideo height : %d\n\tvideo width : %d\n\tfps : %d\n\tframe numbers : %d\n", frameH, frameW, fps, numFrames);


//定义和初始化变量
IplImage* image = NULL;
image = cvQueryFrame(capture); //获取一帧图片


if(image == NULL)
{
printf("视频文件第一帧打开失败！！");
continue;
}
cvNamedWindow("原始视频");
cvShowImage( "原始视频", image );


size.width = WidthResize;
size.height = HeightResize; 


IplImage* desc = cvCreateImage(size,image->depth,image->nChannels);
// cvResize(imageTemp,desc,CV_INTER_CUBIC);
cvResize(image,desc,CV_INTER_CUBIC);


if(desc == NULL)
{
printf("视频文件Resize失败！！");
continue;
}


IplImage* temp = cvCloneImage( desc );
cvNamedWindow("Box Example");
cvShowImage( "Box Example", temp );


char * image_name=NULL;
//char image_name[20];
image_name=(char *)malloc(50*sizeof(char)); //动态分配内存

int c = 0;
while( 1 )
{
//获取空格键值，并置位抠图标志位flag
c = cvWaitKey(1);
// if((char)c==(char)32)
{
printf("%d\n",i);
image = cvQueryFrame(capture); //获取一帧图片
if( capture == NULL )
{
printf("视频文件打开失败！！");
continue;
}
cvNamedWindow("原始视频");
cvShowImage( "原始视频", image );


sprintf_s(image_name,50, "%s%d%s%d%s", "..\\sourceImage\\", jj,"_",++i, ".jpg");//保存的图片名
//如何将这些图片保存到一个指定的文件夹中？ //"d:\\images\\image" 将图片存放在d盘images文件夹下                
cvSaveImage(image_name, image);   //保存一帧图片
}
if(i == numFrames - 1)
break;
}
}
}