How to stream images/data from camera in C++

Question

I have a USB camera pluged in my PC (using windows 7) and I'm trying to create a program to stream images from the camera.

How do I go about doing this? I've got the VID and PID of the camera, but don't know anything more about it. Please help.

Thanks

Have you tought about using DirectShow? I've wrote about it [here](http://stackoverflow.com/questions/7859442/grab-video-stream-from-firewire/7865752#7865752). Maybe it'll be useful. — baderman, May 11 '12 at 15:31

score 5 · Accepted Answer · answered May 11 '12 at 12:47

If you can use OpenCV, there is a very nice example here

 #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;
 }

How to stream images/data from camera in C++

1 Answers1