Flipping an image to get mirror effect

Question

I am working on a video processing project which needs some flipping of frame. I tried using cvFlip but doesnt seem to flip along y axis (x axis working...) and results in segmentation fault. Is there any other option??

cv::Mat dst=src;      //src= source image from cam
cv::flip(dst, dst, 1);     //segmentation fault shown

imshow("flipped",dst);

Answer 1

cv::Mat src=imload("bla.png");
cv::Mat dst;               // dst must be a different Mat
cv::flip(src, dst, 1);     // because you can't flip in-place (leads to segfault)

Answer 2

Use cv::flip and pass 1 as flipcode.

Looking at your edit with the sample code, you cannot flip in place. You need a separate destination cv::Mat:

cv::Mat dst;
cv::flip(src, dst, 1);
imshow("flipped",dst);