MacOS installation
python -m venv opencv-env
source opencv-env/bin/activate
pip list
pip freeze > requirements.txt
# add opencv-python
pip install -r requirements.txt
# check installation, test.py shows the opencv version
brew install ffmpeg
# PyCharm
# models
cat goturn.caffemodel.zip* > goturn.caffemodel.zip
unzip goturn.caffemodel.zip