https://medium.com/@prabhu_irl/getting-started-with-dlib-on-ios-5e66d77380d
brew install --cask xquartz
brew install cmake
brew install ffmpeg
brew install opencv
brew install openblas
git clone https://github.com/davisking/dlib.git
cd dlib/examples && mkdir build && cd build
cmake -G Xcode ..
cmake --build . --config Release