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This problem appears only if you build OpenCV as static library with CUDA and FFmpeg.

To fix the problem replace the following lines in opencv/modules/gpu/src/ffmpeg_video_source.cpp

#ifdef HAVE_FFMPEG
    #include "cap_ffmpeg_impl.hpp"
#else
    #include "cap_ffmpeg_api.hpp"
#endif

with

#if defined(HAVE_FFMPEG) && defined(BUILD_SHARED_LIBS)
    #include "cap_ffmpeg_impl.hpp"
#else
    #include "cap_ffmpeg_api.hpp"
#endif