John Riselvato

The hue filter allows for modification of the hue and saturation of a video. 

In the example below, the hue is set to 45 degrees with an increased saturation, as seen in figure 57.0:

$ ffmpeg -i input.mp4 -vf "hue=h=45:s=2" output.mp4

The hue filter also has framing and time parameters that allow for great effects like animating through hue colors quickly. Expressions can also be programmed, as seen in figure 57.1:

 $ ffmpeg -i input.mp4 -vf "hue=H=2*PI*t:s=cos(2*PI*t)+10" output.mp4

hue
	Indicates the hue filter name

h
	Indicates the hue angle as a number of degrees (default 0)

s
	Indicates the saturation (10 to -10 with default 1)

H
	Indicates hue angle as a number of radians (default 0)

b
	Indicates the brightness (10 to -10 with default 0)


n
	Indicates frame count of the input frame (starts at 0)

t
	Indicates the timestamp (HH:MM:SS)