Ebur128

Audio Multiple outputs Transform

EBU R128 scanner.

FFmpeg filter: ebur128 — 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():

$outputs = $audio->addFilter(new Ebur128(…))->outputs(); // one stream per output pad

Shorthand. Not available — apply() returns a single stream, and Ebur128 has multiple outputs. Use addFilter() + outputs() above.

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
video	bool	false	—	set video output
size	string	640x480	—	set video size
meter	int	9	9–18	set scale meter (+9 to +18)
framelog	Ebur128Level	-1	quiet, info, verbose	force frame logging level
metadata	bool	false	—	inject metadata in the filtergraph
peak	int|string	0	—	set peak mode
dualmono	bool	false	—	treat mono input files as dual-mono
panlaw	float	-3.0102999566398	-10–0	set a specific pan law for dual-mono files
target	int	-23	-23–0	set a specific target level in LUFS (-23 to 0)
gauge	Ebur128Gaugetype	momentary	momentary, shortterm	set gauge display type
scale	Ebur128Scaletype	absolute	absolute, relative	sets display method for the stats
integrated	float	0	—	integrated loudness (LUFS)
range	float	0	—	loudness range (LU)
lra_low	float	0	—	LRA low (LUFS)
lra_high	float	0	—	LRA high (LUFS)
sample_peak	float	0	—	sample peak (dBFS)
true_peak	float	0	—	true peak (dBFS)

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Maps to FFmpeg’s ebur128 filter. Verified against ffmpeg n7.1.1.