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

Paul B Mahol onemda at gmail.com
Sat Feb 2 20:01:53 EET 2019

On 2/2/19, Michael Koch <astroelectronic at t-online.de> wrote:
> 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".

This is not correct, default is one as described in documentation.

> Thanks,
> Michael
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