Capture video from camera in Mac OS X
How I can filter video stream from camera in MacOS X. I write quicktime sequence grabber channel component, but it`s work only if app used SG API. If app used QTKit Capture the component is not worked开发者_JAVA技巧.
Somebody know how I can implement it?
You could use OpenCV for video processing, it's a cross platform image/video processing library: http://opencv.willowgarage.com
Your code would look something like this:
CvCapture* capture = NULL;
if ((capture = cvCaptureFromCAM(-1)) == NULL)
{
std::cerr << "!!! ERROR: vCaptureFromCAM No camera found\n";
return -1;
}
cvNamedWindow("webcam", CV_WINDOW_AUTOSIZE);
cvMoveWindow("webcam", 50, 50);
cvQueryFrame(capture);
IplImage* src = NULL;
for (;;)
{
if ((src = cvQueryFrame(capture)) == NULL)
{
std::cerr << "!!! ERROR: vQueryFrame\n";
break;
}
// perform processing on src->imageData
cvShowImage("webcam", &src);
char key_pressed = cvWaitKey(2);
if (key_pressed == 27)
break;
}
cvReleaseCapture(&camera);
I had success using OpenCV on Mac OS X using cvCaptureFromCAM(0) instead of passing it -1. On linux, -1 seems to do Ok.
It looks like there should be cvReleaseCapture(&capture);
at the end.
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