x264-dev | Rust bindings to x264 | Compression library

Finally, I found the solution. I can solve my problem in the ubuntu:20.04 docker. The important thing you should notice is that you should install OpenCV via apt-get install python3-opencv not using pip.

It is simpler to run cmake & make and make install in the same stage and then copy the install folders. It will allow to not have any build tools like cmake or build-essential in the final docker image.

We will use a custom CMAKE_INSTALL_PREFIX so that OpenCV binaries are installed to a directory and we can copy it straight to the next stage. Using a custom prefix will avoid having to copy CUDA installation or development libraries no longer required. Then we will run ldconfig on that directory to link the libraries as usual.

Modify the build script to use a custom CMAKE_INSTALL_PREFIX:

Since you are new to Docker. Here I will show you something I have known.

You Dockerfile is to create an image with multiple stages:

With multi-stage builds, you use multiple FROM statements in your Dockerfile. Each FROM instruction can use a different base, and each of them begins a new stage of the build. You can selectively copy artifacts from one stage to another, leaving behind everything you don’t want in the final image.

From the description, you need to know all the FROM except the last one is the build pattern, only the complete the application will be copied to the last base image and run in it. So it is not the overwrite, it's a new running environment. You need to install all the dependencies for your application in the last base image if it does not already have.