Question about online demo

[andrewwang0612]

Thanks for the great work.
I want to ask the questions about the code of online demo/main.py!!
How does the buffer mean??

And another question is about the input of model and tvm，
As I know，when I want to compile the torch2tvm ，
the shape have to same with the input shape of model = (4,3,224,224) [If I use num_segment = 4]，
So I am curios about why it can still compile??
Could you tell me the possible reason?

Thank you so much!!