A Straightforward method to build ffmpeg for OpenCV?

[Wynters]

I have been working and doing research into how to build the opencv_ffmpegxxx.dll.

I’m working with OpenCV 4.5.5, the contrib modules and Visual Studio 2019. I AM able to compile OpenCV to dll’s and the world version but getting ffmpeg to build is beyond me.

I set the ffmpeg setting in CMake. Nothing, though I do see a number of mentions in the world dll. Perhaps it is being built but if so, I still can’t use that version with Darknet since it “appears” to need the opencv_ffmpegxxx.dll.

After scouring the web I’ve downloaded many versions of ffmpeg. I’ve tried to build them separately, which won’t work for my needs, but I tried. I tried replacing the code in the opencv-master version but still no dll build.

There surely must be a simple and straightforward way to do this. I’m working with Windows 10, Visual Studio 2019, C++, and OpenCV 4.5.5 with the extra modules.

Any ideas out there? I don’t mind if it’s so simple that I completely overlooked it. I would simply like to build the complete version of OpenCV with the ffmpeg dll.

[cudawarped]

Here you go

Cap_ffmpeg_impl.hpp changes are not applied to opencv build

Hello zadok, Maybe you already found a solution for your problem. If it’s not the case, I share with you a tutorial I made to build the opencv_videoio_ffmpeg*.dll. It’s made to be use by anybody so don’t be mad if you found it too childish. Tutorial to compil you own modified version of opencv_videoio_ffmpeg*.dll Goal: We will modify the library to change the pixel format used when writing raw video with the fourcc codec 0x00000000 which stand for BI_RGB label. There is no fourcc label to u…

Or if you have the ffmpeg libs you could modify the cmake script to link against that instead of using the dll.