pseudocolor
Alter frame colors in video with pseudocolors.
This filter accepts the following options:
- c0
set pixel first component expression
- c1
set pixel second component expression
- c2
set pixel third component expression
- c3
set pixel fourth component expression, corresponds to the alpha component
- index, i
set component to use as base for altering colors
- preset, p
Pick one of built-in LUTs. By default is set to none.
Available LUTs:
- ‘magma’
- ‘inferno’
- ‘plasma’
- ‘viridis’
- ‘turbo’
- ‘cividis’
- ‘range1’
- ‘range2’
- ‘shadows’
- ‘highlights’
- ‘solar’
- ‘nominal’
- ‘preferred’
- ‘total’
- ‘spectral’
- ‘cool’
- ‘heat’
- ‘fiery’
- ‘blues’
- ‘green’
- ‘helix’
- opacity
Set opacity of output colors. Allowed range is from 0 to 1. Default value is set to 1.
Each of the expression options specifies the expression to use for computing the lookup table for the corresponding pixel component values.
The expressions can contain the following constants and functions:
- w
- h
The input width and height.
- val
The input value for the pixel component.
- ymin, umin, vmin, amin
The minimum allowed component value.
- ymax, umax, vmax, amax
The maximum allowed component value.
All expressions default to "val".