[FFmpeg-user] curves filter and tmix filter, suggestions for improvement

Michael Koch astroelectronic at t-online.de
Sat Feb 2 19:10:04 EET 2019

Hi all,

I have two suggestions for improvement:

1. It would be nice if the curves filter could import curves files from 
GIMP. GIMP can export curves files in two different formats, either the 
default format or the "old curves file format". For the old format I 
have a selfmade C# converter to the *.acf format which FFmpeg's curves 
filter can import. But it would be better if FFmpeg could directly 
import GIMP's newer curves format, because it contains more informations.

2. For the tmix filter it would be nice if it would accept "frames = 1", 
meaning "no mixing at all, just a bypass mode". Then it's easier to 
switch the filter on and off with a variable in batch file.
Please add to the documentation: "If the weights parameter is not 
specified, the default is 1 for each frame".


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