将菜单栏添加到QT cvNameWIndow

Question

I am trying to create video-player application with open CV using QT creator. using openCV it is possible to play video files by adding each video frame as an image on an instance of cvNamedWindow.

Now I would like to add a menu bar to this cvNamedWindow so that I can add File, help etc menus. menus. I looked up the documentation of cvNamedWindow and I couldn't find any clue. Any suggestions?

Ps In opencv windows created using QMainWindow, it is straightforwaed to add menu bar. But what I want is to add the menu bar to cvNamedWindow not to a window created using QMainWindow.

Answer 1

OpenCV's user interface is quite limited, so there's no way to accomplish what you are looking for with OpenCV's API.

On the other hand, Qt has a rich API for building graphic applications. Luckily for you, I just shared cvVideo: an example that demonstrates how to play videos on a QWidget surface . Plus, the demo has some neat tricks to change aspect ratio modes . Almost forgot, it displays a simple QMenuBar too.

Answer 2

you can use createButton and createTrackbar with namedWindow, but that's it.

sure, you could simulate a menu with a row of buttons, but if you need something more advanced, stick to the native Qt api.