c++ - How to show different Frame per second of video in two window in opencv -

i using opencv show frames camera. want show frames in 2 separation windows. want show real frame camera first window (show frames after every 30 mili-seconds) , show frames in second window delay (that means show frames after every 1 seconds). possible task. tried code not work well. please give me 1 solution task using opencv , visual studio 2012. in advance

this code

videocapture cap(0); if (!cap.isopened()) {     cout << "exit" << endl;     return -1; } namedwindow("window 1", 1); namedwindow("window 2", 2); long count = 0; mat face_algin; while (true) {     mat frame;     mat original;     cap >> frame;     if (!frame.empty()){         original = frame.clone();                    cv::imshow("window 1", original);         }     if (waitkey(30) >= 0) break;// delay 30ms first window } 

you write loop display frames in single function video file name argument , call them simultaneously multi-threading.

the pseudo code like,

void* play_video(void* frame_rate) {     // play @ specified frame rate } main() {     create_thread(thread1, play_video, normal_frame_rate);     create_thread(thread2, play_video, delayed_frame_rate);     join_thread(thread1);     join_thread(thread2); }