Question

I have implemented contour detection code using opencv 2.3 in real time. I have use my web camera for it.
Now I want to implement it in captured video which are recorded previously and are in my database.

cv::Mat frame;
cv::Mat back;
cv::Mat fore;
cv::VideoCapture cap(0);
cv::BackgroundSubtractorMOG2 bg;
bg.nmixtures = 3;
bg.bShadowDetection = true;

std::vector<std::vector<cv::Point> > contours;

I have not mention my whole code because to load an AVI file I have to do formation here only.

Please anyone can guide me?

Thanx.

Answer 1

You can open a video and read a frame with the following code snippet:

cv::Mat frame;
cv::VideoCapture cap("/path/to/file.avi");
bool ok = cap.open();
// check for errors
cap >> frame; // or cap.read(frame);

You can read about the documentation for VideoCapture for more details. If you encounter problems, you should check, if your video’s codec is supported.