Maskfun

Video Single output Transform

Create Mask.

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

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

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

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
low	int	10	0–65535	set low threshold
high	int	10	0–65535	set high threshold
planes	int	15	0–15	set planes
fill	int	0	0–65535	set fill value
sum	int	10	0–65535	set sum value

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