Agraphmonitor

Audio Video Single output Transform

Show various filtergraph stats.

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

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

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

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
size	string	hd720	—	set monitor size
opacity	float	0.9	0–1	set video opacity
mode	int|string	0	—	set mode
flags	int|string	1	—	set flags
rate	string	25	—	set video rate

FFmpeg also names these options (use the parameter shown above): s → size, o → opacity, m → mode, f → flags, r → rate.

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