OpenCV Windows - The library is compiled without QT support in function displayOverlay

Question

I'm getting the following error:

python run.py
OpenCV Error: The function/feature is not implemented (The library is compiled without QT support) in displayOverlay, file /build/opencv/src/opencv-3.4.0/modules/highgui/src/window.cpp, line 528
Traceback (most recent call last):
  File "run.py", line 203, in <module>
    change_img_index(0)
  File "run.py", line 25, in change_img_index
    "" + str(last_img_index), 1000)
cv2.error: /build/opencv/src/opencv-3.4.0/modules/highgui/src/window.cpp:528: error: (-213) The library is compiled without QT support in function displayOverlay

If I had installed via cmake I think I would only need to make sure the WITH_QT flag is set to WITH_QT=ON and recompile (as referenced here) but what if I installed using the pre-built libraries?

@Aram I installed using the pre-built packages, first method here: https://docs.opencv.org/master/d3/d52/tutorial_windows_install.html So I didn't use cmake — João Cartucho, Feb 15 '18 at 13:25
Ok I guess I have to re-install everything and this time with cmake, right? — João Cartucho, Feb 15 '18 at 13:26
Oh I misread as you had used the flag WITH_QT=ON, yes its most likely the prebuilts don't use qt. — aram, Feb 15 '18 at 13:31

raggot · Accepted Answer · 2018-02-24T15:43:08.940

3

I came to this page because I had the same problem. I was having it trying to run python run.py for this Github project.

I actually found the solution to the problem on the project's page, in this issue's thread. Following the instructions provided by MattKleinsmith about installing opencv-python using:

pip install opencv-python

the script was able to run immediately.

edited Feb 24 '18 at 15:43

answered Feb 24 '18 at 15:19

raggot

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And by the way, I know you are the project's author and opened this question to help a user solving a similar issue :) – raggot Feb 24 '18 at 15:21

OpenCV Windows - The library is compiled without QT support in function displayOverlay

1 Answers1