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I am trying to write a patch to the FFmpeg API, and I am able to build the FFmpeg library dlls for Windows successfully using the instructions on their website (MinGW/FFmpeg installation guide). However, I'm not sure how to package these various dlls (avfilter.dll, avformat.dll, avcodec.dll, etc.) into the opencv_ffmpeg.dll that the CMake looks for when building OpenCV. I will eventually want to build my custom FFmpeg libraries and OpenCV cross-platform for Linux and Mac OS X, as well. The end game is to have Java-wrapped OpenCV working cross-platform with a modified FFmpeg API. How do I do this?

I am trying to write a patch to the FFmpeg API, and I am able to build the FFmpeg library dlls for Windows successfully using the instructions on their website (MinGW/FFmpeg installation guide). However, I'm not sure how to package these various dlls (avfilter.dll, avformat.dll, avcodec.dll, etc.) into the opencv_ffmpeg.dll that the CMake looks for when building OpenCV. I will eventually want to build my custom FFmpeg libraries and OpenCV cross-platform for Linux and Mac OS X, as well. The end game is to have Java-wrapped OpenCV working cross-platform with a modified FFmpeg API. How do I do this?