c++ - Video from 2 cameras (for Stereo Vision) using OpenCV, but one of them is lagging -

i'm trying create stereo vision using 2 logitech c310 webcams. result not enough. 1 of videos lagging compared other one.

here opencv program using vc++ 2010:

#include <opencv\cv.h> #include <opencv\highgui.h> #include <iostream>  using namespace cv; using namespace std;  int main() {     try     {         videocapture cap1;         videocapture cap2;          cap1.open(0);         cap1.set(cv_cap_prop_frame_width, 1040.0);         cap1.set(cv_cap_prop_frame_height, 920.0);          cap2.open(1);           cap2.set(cv_cap_prop_frame_width, 1040.0);         cap2.set(cv_cap_prop_frame_height, 920.0);         mat frame,frame1;          (;;)         {             mat frame;             cap1 >> frame;              mat frame1;             cap2 >> frame1;              transpose(frame, frame);             flip(frame, frame, 1);              transpose(frame1, frame1);             flip(frame1, frame1, 1);              imshow("img1", frame);             imshow("img2", frame1);              if (waitkey(1) == 'q')                 break;         }          cap1.release();         return 0;     }     catch (cv::exception & e)     {         cout << e.what() << endl;     } } 

how can avoid lagging?

you're saturating usb bus.

try plug 1 in front, other in back(in hope land on different buses),

or reduce frame size / fps generate less traffic.