On 4/23/19, Michael Koch <astroelectro...@t-online.de> wrote: > 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 > "[0]scale=640:400,atadenoise[a];[1]atadenoise,scale=640:400[b];[a][b]hstack" > out.mov > > There are at least six different denoisers available: atadenoise, bm3d, > dctdnoiz, fftdenoiz, owdenoise and vaguedenoiser
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