I want to know the best way to do a resize

[funkguy4]

Hey guys.
I'm going to start some testing with MainConcept for MPEG-2 encoding.

I know that frameserving from VirtualDub is relatively slow...so I was wondering some things:

-What is AVISynth's counterpart of the "precise Bicubic Resize" from VDub
-Is it as sharp as VDub's Bicubic resize
-Does Mainconcept's native resize do a good job? (This would probably be one of the fastest solutions if it is)

[deadpac]

AVISynth[/url] Documention]With b = 0 and c = 0.75 the filter is exactly the same as VirtualDub's "precise bicubic," and the results are identical except for the VirtualDub scaling problem mentioned above.

The code being reference above looks something like this.

BicubicResize(clip, int target_width, int target_height, float "b", float "c")

A lot of people seem to like LanczosResize as a good if not better alternative to BicubicResize.

LanczosResize is an alternative to BicubicResize with high values of c about 0.6 ... 0.75 which produces quite strong sharpening.
It usually offers better quality (fewer artifacts) and a sharp image.

A good tool to use in conjuntion with AVISynth is FitCD which is great for resizing, it even saves the script for you.

[funkguy4]

thx a bunch yo

i decided to run with Lanczos, but what's crazy is that it ties up 40% of my CPU to play it in WMP 9!