How could you get the camera parameter for mixamo smpls

[EricGuo5513]

Hi, thanks for you interesting work.

In demo_imitator.py, you transfer motions from mixamo smpls (e.g. ./assets/samples/refs/mixamo) to images. I guess these motions are obtained from Adobe Mixamo https://www.mixamo.com/#/?page=1&type=Motion%2CMotionPack. I notice there is a 3d camera parameters for each frame in the result.pkl file. Do you have any idea ehre this parameter come from?

Thanks in advance.