OpenCV 3.0.0 “configure” fails, ffmpeg not downloaded

Question

I get the following error when trying to configure OpenCV using CMAKE on windows:

CMake Warning at cmake/OpenCVUtils.cmake:865 (message):
Download: Local cop         


        

Answer 1

You have to copy the files into your source folder, where you want to built from.

In my case it is then

C:\opencv_source\3rdparty\ffmpeg\downloads\35fe6ccdda6d7a04e9056b0d73b98e76

C:\opencv_source\3rdparty\ffmpeg\downloads\89c783eee1c47bfc733f08334ec2e31c

C:\opencv_source\3rdparty\ffmpeg\downloads\8606f947a780071f8fcce8cbf39ceef5

An they include these files in the same order

opencv_ffmpeg_64.dll
opencv_ffmpeg.dll
ffmpeg_version.cmake

Have a look into the file ffmpeg_cmake what CMake expects as md5-hash as folder label