Blurdetect

Video Single output Transform

Blurdetect filter.

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

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

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

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
high	float	0.11764705882353	0–1	set high threshold
low	float	0.058823529411765	0–1	set low threshold
radius	int	50	1–100	search radius for maxima detection
block_pct	int	80	1–100	block pooling threshold when calculating blurriness
block_width	int	-1	≥ -1	block size for block-based abbreviation of blurriness
block_height	int	-1	≥ -1	block size for block-based abbreviation of blurriness
planes	int	1	0–15	set planes to filter

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