Paul B Mahol (12023-06-14):
> To flag filters that can work with variable frame size changes
> all the time in graph. So no rescalers are need to be inserted or
> filtergraph reset.
> 
> Once all such filters are flaged with such capability then code will be
> added so auto inserted rescale filter is inserted where neccesarry to
> filters in
> filtergraph that do not support dynamic width/height changes.

If you have a proof-of-concept patch series where this flag is actually
useful, I will review it.

As it is, it is dead code and not for commit.

-- 
  Nicolas George