Pseudocolor

Video Single output Transform

Make pseudocolored video frames.

FFmpeg filter: pseudocolor — the official reference.

Add it to a graph. The explicit form works for every filter — bind it to its input and read the result from outputs():

$node   = $video->addFilter(new Pseudocolor(…));
$result = $node->outputs()[0];

Shorthand. Single-output filters can skip the node — apply() returns the result stream directly:

$result = $video->apply(new Pseudocolor(…));

When to use it

TODO — when this filter shines: what it’s the right tool for, what to reach for instead when it isn’t, and how it composes with neighbouring filters.

How to use it

TODO — prose: how the filter actually works and what its key parameters mean (the explanation FFmpeg’s terse option help omits).

Examples

TODO — runnable PHP, with the equivalent ffmpeg CLI alongside.

Gotchas

TODO

See also

TODO

Parameters

Parameter	Type	Default	Range / values	Description
c0	string	val	—	set component #0 expression
c1	string	val	—	set component #1 expression
c2	string	val	—	set component #2 expression
c3	string	val	—	set component #3 expression
index	int	0	0–3	set component as base
preset	PseudocolorPreset	none	none, magma, inferno, plasma, viridis, turbo, cividis, range1, …	set preset
opacity	float	1	0–1	set pseudocolor opacity

FFmpeg also names these options (use the parameter shown above): i → index, p → preset.

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Maps to FFmpeg’s pseudocolor filter. Verified against ffmpeg n7.1.1.