import vapoursynth as vs
from vapoursynth import core
from vsrealesrgan import realesrgan

# Video Source
clip = core.ffms2.Source(source='../1-Temp/source.mkv')

# Set Input Colorspace
clip = core.resize.Bicubic(clip, format=vs.RGBS, matrix_in_s="709")

# Upscale
clip = realesrgan(clip=clip, model=4)

# Set Output Colorspace
clip = core.resize.Bicubic(clip, format=vs.YUV420P8, matrix_s="709")

clip.set_output()