Silenceremove

Audio Single output Transform

Remove silence.

FFmpeg filter: silenceremove — 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   = $audio->addFilter(new Silenceremove(…));
$result = $node->outputs()[0];

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

$result = $audio->apply(new Silenceremove(…));

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
start_periods	int	0	0–9000	set periods of silence parts to skip from start
start_duration	int	0	≥ 0	set start duration of non-silence part
start_threshold	float	0	≥ 0	set threshold for start silence detection
start_silence	int	0	≥ 0	set start duration of silence part to keep
start_mode	SilenceremoveMode	any	any, all	set which channel will trigger trimming from start
stop_periods	int	0	-9000–9000	set periods of silence parts to skip from end
stop_duration	int	0	≥ 0	set stop duration of silence part
stop_threshold	float	0	≥ 0	set threshold for stop silence detection
stop_silence	int	0	≥ 0	set stop duration of silence part to keep
stop_mode	SilenceremoveMode	all	any, all	set which channel will trigger trimming from end
detection	SilenceremoveDetection	rms	avg, rms, peak, median, ptp, dev	set how silence is detected
window	int	20000	0–100000000	set duration of window for silence detection
timestamp	SilenceremoveTimestamp	write	write, copy	set how every output frame timestamp is processed

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