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I'm composing a video from set of 16bit tiff pictures. The pictures are very dark, and needs to be brightened. Currently I'm applying -vf "mp=eq2=1.0:1.0:0.3:1.0:1.0:1.0:1.0:1.0" filter to make pictures brighter, as said here, but they becomes too "faded".

I used to rescale their histogram with "levels adjustment" operation in image editor to make them brighter, but now I need to make a video, not a single image file. Also, preffered way of applying such operations to image - is to applying it to each color band separatly, because they have different brightness attributes initialy.

Can I do something similar with ffmpeg?

1 Answer 1

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original with curves filter

You could possibly use the curves filter. It has a lighter preset:

ffmpeg -i input -vf curves=preset=lighter -c:a copy output

The red, green, and blue components can be adjusted separately. The following is the same as what the lighter preset uses:

curves=r='0.4/0.5':g='0.4/0.5':b='0.4/0.5'

Additionally you can make your own curves preset in Photoshop, export it as an .acv file, and then the curves filter can utilize it:

curves=psfile=/path/to/ps_curves_file.acv
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  • Awesome, exactly what I needed Nov 26, 2014 at 6:07
  • Do you know why I get a warning when trying to run the filter with the values that the lighter preset is supposedly using under the hood? Only one point (at (0.100000;0.500000)) is defined, this is unlikely to behave as you expect. Jan 21 at 1:28

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