[FFmpeg-user] which blur filter should I use?

[Carl Eugen Hoyos]

Lingyuan Wang <lwanghpc <at> gmail.com> writes:

> I still don't understand why sws_scale() is used in both 
> filters even the input/output dimensions are the same...).

The software scaler contains the different blur filters 
which is why you don't have to insert a filter in advance 
to scaling, just tell the scaler which algorithm to use.

Carl Eugen