Some VapourSynth functions

[hello_hello]

I won't bother repeating the threads for them here, but I thought I'd add a post to the VapourSynth sub-forum for anyone who might be interested.

As a learning experience I've created native VapourSynth versions of these three functions.

CropResize (https://forum.doom9.org/showthread.php?t=176667)
A function for cropping and resizing without having to calculate aspect error.

FrostyBorders (https://forum.doom9.org/showthread.php?t=175039)
Adds various types of borders that change based on the current frame. Also included in CropResize.

CPreview (https://forum.doom9.org/showthread.php?t=183781)
A simple function for previewing cropping based on the cropping preview in CropResize.

RGBColor (https://forum.doom9.org/showthread.php?t=185022)
For specifying a color for borders or BlankClip in an Avisynth-like manner.

[hello_hello]

I've updated all three scripts. The new versions are dated 2023-10-02.

Links can be found in the opening post of their respective threads.