I cannot manage to get the output you describe. I always use the command line but I have tried your approach above and the command line below without any issues
"C:\Program Files\CMake\bin\cmake.exe" -BC:/opencv/build -Hc:/opencv -G"Visual Studio 17 2022" -DOPENCV_FFMPEG_USE_FIND_PACKAGE=ON -DFFMPEG_DIR=C:/fmpeg-master-latest-win64-gpl-shared/cmake
Note: The only difference in the GUI is that I add the FFMPEG_DIR and OPENCV_FFMPEG_USE_FIND_PACKAGE variables before hitting Configure the first time.
The output for FFMpeg config is then:
– Video I/O:
– FFMPEG: YES (find_package)
– avcodec: YES (59.18.100)
– avformat: YES (59.16.100)
– avutil: YES (57.17.100)
– swscale: YES (6.4.100)
– avresample: NO
– GStreamer: NO
– DirectShow: YES
– Media Foundation: YES
– DXVA: YES
Do you receive any warnings etc. in the window at the bottom before the configuration output?