Need an SR rescaling filter for Avidemux

[dokipubast]

Something like Genuine Fractals/Perfect Resize. For upscaling by a factor of ~3:1. Is there anything that is superior to bicubic/lanzcos3?

[manono]

Yes, Nnedi3rpow2. Probably not for AviDemux, though, for AviSynth.

[dokipubast]

For upscaling by a factor of ~3:1.

nnedi3_rpow2 is for enlarging images by powers of 2.

what

[poisondeathray]

Most SR algorithms use powers of 2. You scale up 2*2 then back down to your desired final dimensions. In nnedi3_rpow2, you can use fwidth=x , fheight=y for final dimensions, and you can specify the scaling algorithm used for the downscale with cshift

[jagabo]

For upscaling by a factor of ~3:1.

nnedi3_rpow2 is for enlarging images by powers of 2.

what

Use:

nnedi3_rpow2(2, cshift="Spline36Resize", fwidth=width*3, fheight=height*3) # upscale 2x then resize to 3x

or

nnedi3_rpow2(4, cshift="Spline36Resize", fwidth=width*3, fheight=height*3) # upscale 4x then resize to 3x

Both are better than Spline36Resize(width*3, height*3). Following up with Sharpen() or aWarpSharp() can help too. Or upscale half way, sharpen, upscale the other half way, sharpen().

What works best depends on your source though. Something like hq3x() (part of the pointsize package) works best for some older game console graphics.

https://forum.videohelp.com/threads/331048-I-updated-Super-%28c%29-it-s-giving-HORRID-r...=1#post2051159

Of course, none of this works within AviDemux.