Q:

What are XForm In and XFormOut Pins in directshow?

What are XForms pins? How are they different than normal Input/output pins? Do they behave different than normal pins when connecting them? 

A:

How are they different than normal Input/output pins? 

Different just by naming, suggesting that "X" stands for "Trans-". The naming actually comes from underlying base class CTransformFilter.

Do they behave different than normal pins when connecting them? 

No.

