Fftdnoiz

Video Single output Transform

Denoise frames using 3D FFT.

FFmpeg filter: fftdnoiz — 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 Fftdnoiz(…));
$result = $node->outputs()[0];

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

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

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
sigma	float	1	0–100	set denoise strength
amount	float	1	0.01–1	set amount of denoising
block	int	32	8–256	set block size
overlap	float	0.5	0.2–0.8	set block overlap
method	FftdnoizMethod	wiener	wiener, hard	set method of denoising
prev	int	0	0–1	set number of previous frames for temporal denoising
next	int	0	0–1	set number of next frames for temporal denoising
planes	int	7	0–15	set planes to filter
window	FftdnoizWinFunc	hanning	rect, bartlett, hanning, hamming, blackman, welch, flattop, bharris, …	set window function

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