[fadedmaple]

Originally Posted by Khanattila

Hi fadedmaple, can you post the whole script?
The situation you describe is typical of a CPU-bottleneck.

here the whole script ，nothing special

from vapoursynth import core
import vapoursynth as vs

src = core.lsmas.LWLibavSource(r'E:\OB\MEET_THE_FOCKERS_HDCLUB\BDMV\STREAM\00372.m2ts')

src = core.knlm.KNLMeansCL(src,d = 3,a = 6, h = 1.2,channels="Y",device_type = "gpu" )
src = core.knlm.KNLMeansCL(src,d = 3,a = 6, h = 1.2,channels="UV",device_type = "gpu" )

src.set_output()

If i set the parametes as default (d = 1,a = 2),the x265 get a faster speed，even faster than no denoise.
So I think it really is using my GPU.

I use vseditor to benchmark ,when set d=3 a=6 ,CPU usage is very low，why CPU-bottleneck?