Question

opencv有没有捕捉摄像头的方法，可以替代以前使用的directShow

Answer 1

看下这个代码
int cameraId=0; //0 for the webcam and maybe 1 for other USB cam you plugged in. try 0,1,2 if you
//have multiple ones.
VideoCapture capture;
capture.open(cameraId);
if( capture.isOpened() )
{
Mat view0;
capture >> view0;
}