i upscale a few anime videos using this script

v = LWLibavVideoSource("d:\4.mp4", fpsnum=30000, fpsden=1001, format="YUV420P8")
a = LWLibavAudioSource("d:\4.mp4")
AudioDub(a,v)
ConvertToYV12()
ColorMatrix(mode="Rec.601->Rec.709")
FastLineDarkenMod()
Spline36Resize(720,480)
ColorYUV(cont_u=20, cont_v=30)
Toon(strength=1.0)
nnedi3_rpow2(2, cshift="Spline36Resize", fwidth=1280, fheight=720)
aWarpSharp(depth=10.0)
sharpen(0.3)


i chage it a bit to bit i need to add denoise filter to it
can some one help me with that?
screep capture
https://forum.videohelp.com/images/imgfiles/rH5zRfz.jpg

you cant really see it here but it appears from time to time

what do you say about the script anyway? it works great for me