OPENCV采集并保存视频的程序（源码）

#include <stdio.h> #include <cv.h> #include <cxcore.h> #include <highgui.h> #include <iostream.h> int main( int argc, char** argv ) { CvCapture* pCapture = NULL; int nFrmNum = 0; //创建窗口 cvNamedWindow("video", 1); //使窗口有序排列 cvMoveWindow("video", 30, 0); if( argc > 2 ) { fprintf(stderr, "Usage: bkgrd [video_file_name]\n"); return -1; } //打开摄像头 if (argc ==1) if( !(pCapture = cvCaptureFromCAM(-1))) { fprintf(stderr, "Can not open camera.\n"); return -2; } //打开视频文件 if(argc == 2) if( !(pCapture = cvCaptureFromFile(argv[1]))) { fprintf(stderr, "Can not open video file %s\n", argv[1]); return -2; } CvVideoWriter * writer=0; //int isColor=1; //int frameH = (int) cvGetCaptureProperty(pCapture, CV_CAP_PROP_FRAME_HEIGHT); //int frameW = (int) cvGetCaptureProperty(pCapture, CV_CAP_PROP_FRAME_WIDTH); //cvSetCaptureProperty(pCapture,CV_CAP_PROP_FOURCC,CV_FOURCC('D', 'I', 'V', 'X')); //double fps = 20.0; // or 30 // int outCompressCodec=CV_FOURCC('D', 'I', 'V', '3'); int key; int frameNum=0; IplImage * img=0; while(1) { img = cvQueryFrame( pCapture ); if(0==frameNum) { int outCompressCodec = cvGetCaptureProperty(pCapture,CV_CAP_PROP_FOURCC); writer=cvCreateVideoWriter("out4.avi",outCompressCodec, 15, cvSize(img->width, img->height), 1 ); } if (!img) { cout<<"pFrame==null"<<endl; return 0; } frameNum++; cvWriteFrame(writer,img); cvShowImage("video",img); if( cvWaitKey(20) >= 0 ) break; } //销毁窗口 cvDestroyWindow("video"); cvReleaseVideoWriter(&writer); cvReleaseCapture(&pCapture); return 0; }