Qt 5 OpenCV windows deployment error

[Bence991]

Hello everyone.

I am developing a image corrector app, using QT creator(Qt 5) and OpenCV libraries. I built OpenCV with Cmake, the works fine until try to deploy a release runnable version. For building I using MinGW and for deploying I am using the QT mingw deployment tool. This too,l works fine when I deploy non OpenCV based projects. I am an unexperienced developer and a bit confused where should I start to search the answer. When I try to run the executable in the release folder I got the following error message:The application was unable to start correctly (0xc000007b).
I would be grateful any kind of help.

[jsulm]

@Bence991 Did you try to copy OpenCV DLLs manualy into your app folder where the executable is?

[Bence991]

@jsulm Yes I tried. About a year ago I deployed a simple webcamera app which also used OpenCV and I remembered that I had to copy these files that time also.

[jsulm]

@Bence991 So, does it work now if you copy these DLLs manually?

[Bence991]

No, I tried it before posted here the problem. I also tried to check the problem with the "Dependencies" program, and as much I understand the UI it did not find any missing dll. I got the same error message, it behaves like I did not used the deployment tool.

[SGaist]

Hi,

The output looks good.

Just in case, did you also check the OpenCV dlls to see if you have their dependencies as well ?

[Bence991]

@SGaist I got the same results If I check the Qt based dlls and the opencv dlls, but i am sure the OpenCV part is the key, because I can deploy other non OpenCV based projects with the same method. Just do not understand what is the problem and how to debug it.

[SGaist]

Did you try to replicate that with a minimal example that uses only a simple call from the OpenCV library ?