写入视频文件

/* 写入视频文件 */
/*命令行调用方式：
   E:\软件编程\毕业设计\OpenCV\exam1\debug > exam1 1.avi 2.avi
   //exam1为exe文件  1.avi为原视频文件 2.avi 为接收视频文件
*/

#include "cv.h"
#include "highgui.h"

void exam5( int argc, char** argv )
{
	//argv[1] = "1.avi";
	//argv[2] = "2.avi";
	int count = 0;
	CvCapture* capture = 0;	        
         if( argc == 3 )
              capture = cvCreateFileCapture( argv[1] );
         else
              return;	

         if( !capture )
	        return;
	IplImage *bgr_frame = cvQueryFrame( capture );
	double fps = cvGetCaptureProperty(
		capture,
		CV_CAP_PROP_FPS
	);
	CvSize size = cvSize(
		(int)cvGetCaptureProperty( capture, CV_CAP_PROP_FRAME_WIDTH ),
	    (int)cvGetCaptureProperty( capture, CV_CAP_PROP_FRAME_HEIGHT )
	);
	CvVideoWriter *writer = cvCreateVideoWriter(
		argv[2],
		CV_FOURCC( 'M','J','P','G' ),
		fps,
		size
	);
	IplImage* logpolar_frame = cvCreateImage(
		size,
		IPL_DEPTH_8U,
		3
	);
	while( (bgr_frame=cvQueryFrame(capture)) != NULL )
	{
		count++;
		if( count%100 == 0 )
		printf( "正在提取第%d帧\n",count );
		cvLogPolar( bgr_frame, logpolar_frame,
			cvPoint2D32f( bgr_frame->width/2,bgr_frame->height/2 ),
			40,
			CV_INTER_LINEAR+CV_WARP_FILL_OUTLIERS
		);
		cvWriteFrame( writer, logpolar_frame );
		if( count == 10000 ) break;
	}
	cvWaitKey(0);
	printf( "提取完毕，共%d帧\n",count );
	system( "pause" );
    cvReleaseVideoWriter( &writer );
	cvReleaseImage( &logpolar_frame );
	cvReleaseCapture( &capture );
}

int main( int argc, char** argv ){

          exam5( argc, argv );

}