The package `libprotobuf-dev` contains files of the sort `google/protobuf/any.proto`. If the package is missing, then `python3 setup.py gen_protos` fails.
If the package `libgtk2.0-dev` is not installed before opencv is build, then the example f15da632de/mediapipe/python/solutions/pose.py doesn't work with a live cam and it fails with the following error message:
```
INFO: Created TensorFlow Lite XNNPACK delegate for CPU.
Traceback (most recent call last):
File "pose.py", line 28, in <module>
cv2.imshow('MediaPipe Pose', image)
cv2.error: OpenCV(3.4.11) /tmp/pip-install-5y2ipa9p/opencv-python/opencv/modules/highgui/src/window.cpp:658: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Carbon support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function 'cvShowImage'
```
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