[FFmpeg-user] denoise after scaling or before?

Michael Koch astroelectronic at t-online.de
Tue Apr 23 13:09:48 EEST 2019

Am 23.04.2019 um 11:43 schrieb Jon bae:
> Hello,
> I just have an general question:
> As I know denoiser are specialized to specific noise pattern.
> Makes it a different when I denoise after scaling a video, or is the
> quality better when I denoise before scaling.
> In terms of speed it would be better for me, denoising after scaling, but
> when the quality is better, then I would go that way.

You could try both versions simultaneously and compare them with hstack:

ffmpeg -i in.mov -i in.mov -filter_complex 

There are at least six different denoisers available: atadenoise, bm3d, 
dctdnoiz, fftdenoiz, owdenoise and vaguedenoiser


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