使用C++中的directshow在網絡攝像頭的窗口中進行簡單的視頻捕獲

Question

我一直在試圖編寫一個簡單的程序，它只從幾秒鐘的時間在網絡攝像頭上記錄短視頻並將其存儲在文件中，但我無法這樣做。如果有人已經經歷過這件事，請幫助我。謝謝

Answer 1

我會建議使用opencv代替。有許多書籍和開源項目。取自（http://opencv.willowgarage.com/wiki/CameraCapture）的示例

下面是一個簡單框架，用於連接相機並在窗口中顯示圖像。

#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; 
}