simple combination of pyimgui and opencv
- https://marina.sys.wakayama-u.ac.jp/~tokoi/?date=20040914
- https://qiita.com/Dhichisutto/items/76ec93c690caf20cedb9
- https://aoirint.hatenablog.com/entry/2020/03/23/011157
- http://wisdom.sakura.ne.jp/system/opengl/gl23.html
- http://wisdom.sakura.ne.jp/system/opengl/gl26.html
- https://blog.mktia.com/save-video-with-opencv-python/
- https://qiita.com/chez_sugi/items/76a839244449b716c587
- platform : ubuntu18.04LTS
- python : 3.8.8
- pyimgui : https://github.com/swistakm/pyimgui
- GLFW : 2.1.0
- imgui : 1.3.1
- OpenCV : 4.5.1