用OpenCV调整视频大小

// videoProcess.cpp : 定义控制台应用程序的入口点。
//

#include"stdafx.h"
#include
#include
#include

int main(int argc, char *argv[])
{
CvCapture* capture = cvCaptureFromAVI("D:\\video\\sunglass\\day\\x12.avi");

IplImage* frame = 0;

int isColor = 1;
int fps = 25; // or 25
CvVideoWriter *writer = cvCreateVideoWriter("D:\\video\\sunglass\\day\\xx12.avi",CV_FOURCC('X','V','I','D'),fps,cvSize(640,480),isColor);

cvNamedWindow( "vivi");
//读取和显示
while(1)
{
frame = cvQueryFrame(capture); //获取一帧图片
if(frame == NULL)
break;

CvSize dstSize = cvSize(frame->width * 2, frame->height * 2);
IplImage *dst = cvCreateImage(dstSize, frame->depth, frame->nChannels);

cvResize( frame, dst, CV_INTER_LINEAR );
cvShowImage( "vivi", dst ); //将其显示
char key = cvWaitKey(10);

cvWriteFrame(writer, dst);
frame = NULL;
cvReleaseImage(&dst);
}

cvReleaseVideoWriter(&writer);
cvDestroyWindow("vivi");

return 0;
}

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