Simplify demo.py

[bhack]

Can you simplify the demo to just return, tracks, visibility and eventually a video writer?
All the Tensorboard summary logics for a simple/minial inference demo it It is too convoluted to incentivize the pip2 testability

[aharley]

What do you mean by video writer?

[bhack]

I meant a basic demo will just require 2d points tracks, occlusions x point and eventually/optionally a video or image sequence writer for visualization.
Depending on the tensorboard summary for the minimal demo is convoluted.

[merveenoyan]

Hello @aharley would you be into creating a demo with gradio and hosting it on Hugging Face Spaces instead? We could also grant you hardware upgrade for limited time!