[FFmpeg-user] Problems controlling sws-scale dithering.

Steinar Apalnes steipal at gmail.com
Fri Jun 25 11:14:19 EEST 2021


I'm having difficulty controlling dithering when video bit depth goes down.
The following command illustrates the problem:

ffplay.exe -f lavfi -i mandelbrot -sws_dither none -vf

I'm just using ffplay to visually show the undesired effect. Normal
operation would be with ffmpeg but the outcome is the same in both cases.
The image goes down from 8 bit to 3 bit per component and is dithered, even
though I'm trying to turn it off dithering. So I'm interested in
controlling dithering in the sws-scaler in general but cannot find the
means to do it. Either it's not working properly or I'm doing something


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