使用C ++中的DirectShow從網絡攝像頭在Windows中進行簡單的視頻捕獲

Question

我一直在嘗試編寫一個簡單的程序，僅錄制幾秒鍾的攝像頭視頻並將其存儲在文件中，但我無法這樣做。 如果有人曾經經歷過此事，請幫助我。 謝謝

Answer 1

我建議改用opencv。 有許多書籍和開源項目。 示例取自（ http://opencv.willowgarage.com/wiki/CameraCapture ）

這是一個簡單的框架，用於連接攝像機並在Window中顯示圖像。

#include "cv.h" 
#include "highgui.h" 
#include <stdio.h>  
// A Simple Camera Capture Framework 
int main() {
  CvCapture* capture = cvCaptureFromCAM( CV_CAP_ANY );
  if ( !capture ) {
    fprintf( stderr, "ERROR: capture is NULL \n" );
    getchar();
    return -1;
  }
 // Create a window in which the captured images will be presented
 cvNamedWindow( "mywindow", CV_WINDOW_AUTOSIZE );
 // Show the image captured from the camera in the window and repeat
 while ( 1 ) {
   // Get one frame
   IplImage* frame = cvQueryFrame( capture );
   if ( !frame ) {
     fprintf( stderr, "ERROR: frame is null...\n" );
     getchar();
     break;
   }
   cvShowImage( "mywindow", frame );
   // Do not release the frame!
   //If ESC key pressed, Key=0x10001B under OpenCV 0.9.7(linux version),
   //remove higher bits using AND operator
   if ( (cvWaitKey(10) & 255) == 27 ) break;
 }
 // Release the capture device housekeeping
 cvReleaseCapture( &capture );
 cvDestroyWindow( "mywindow" );
 return 0;
}