how to install pyflow into root lib?

[HuangBo-Terraloupe]

Hello,
I have 2 questions:

1, How to install pyflow into root, so we can directly use it?
2, I assume that we calculate the optical flow using current frame and previous frame, I want to make sure that and I want to make sure that 2 input image into the function are in right order.
For example the image in demo.py, car1 will be the frame in time step 1, car2 will be the frame in time step 2?

thanks in advance.

[HuangBo-Terraloupe]

please answer my second question, I did not found any documentation in the code.
thanks.