Vcpkg fails to configure the opencv build. Apparently ffmpeg could not be downloaded. This can be circumvented by downloading it manually and putting it in the opencv-cache folder.
Steps to reproduce:

• Download vcpkg (I just downloaded the zip and unzipped it)
• cd vcpkg
• bootstrap.bat
• ./vcpkg install opencv[opengl,ffmpeg,dnn]:x64-windows

I suppose only the ffmpeg option is relevant here. It was functional before and still is on our old/modified fork: https://github.com/BioroboticsLab/RF_vcpkg
System: Windows 7, x64
cl: Microsoft (R) C/C++ Optimizing Compiler Version 19.15.26729 for x64
config-x64-windows-out.log