How to play and detect an object using captured video in background subtractor model?

Question

everyone.! I am using opencv2.4.2. actually I am doing project on object detection. I tried using BackgroundSubtractorMOG model. But I am not able to load video file

Answer 1

The video loading in opencv works for me. To load a video you can try something like this. Once you have captured frame you either do processing in the loop or can call a separate function.

std::cout<<"Video File "<<argv[1]<<std::endl;

cv::VideoCapture input_video(argv[1]);

namedWindow("My_Win",1);

Mat cap_img;

while(input_video.grab())
{
   if(input_video.retrieve(cap_img))
   {
     imshow("My_Win", cap_img);
     /* Once you have the image do all the processing here */
     /* Or Call your image processing function */
     waitKey(1);

   }
}

or You can do something

int main(int argc, char*argv[])
{

    char *my_file = "C:\\vid_an2\\desp_me.avi";
    std::cout<<"Video File "<<my_file<<std::endl;
    cv::VideoCapture input_video;

    if(input_video.open(my_file))
    {
         std::cout<<"Video file open "<<std::endl;
    }
    else
    {
        std::cout<<"Not able to Video file open "<<std::endl;

    }
    namedWindow("My_Win",1);
    namedWindow("Segemented", 1);
    Mat cap_img;
    for(;;)
    {
         input_video >> cap_img;
         imshow("My_Win", cap_img);
          waitKey(0);
    }
   return 0;
 }