c++ - Image not being displayed using webcam in opencv -

i have started learn opencv, stuck in program.

i trying run program displays video in-built webcam.

#include <opencv2\highgui\highgui.hpp>  int main() { cvnamedwindow("streaming", cv_window_autosize); cvcapture* capture = cvcreatecameracapture(0); iplimage* frame; while (1) {     frame = cvqueryframe(capture);     if (!frame) break;     cvshowimage("streaming", frame);     char c = cvwaitkey(33);     if (c == 27) break; } cvreleasecapture(&capture); cvdestroywindow("streaming"); return 0; } 

all working fine no errors being thrown, when run program new window named streaming being opened , webcam light switch on (means webcam has started), inspite of no video being displayed in new window opened.

can on this? beginner in this.

thanks in advance!!

i suggest migrating old cv implementation newly made methods opencv 2.

take @ videocapture class, has more intuitive methods. example, can use method isopened() check if webcam has been activated.

there's nice tutorial on here out new methods.