Atrim

Audio Single output Transform

Pick one continuous section from the input, drop the rest.

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

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

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

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
starti	int	—	—	Timestamp of the first frame that should be passed
endi	int	—	—	Timestamp of the first frame that should be dropped again
start_pts	int	—	—	Timestamp of the first frame that should be passed
end_pts	int	—	—	Timestamp of the first frame that should be dropped again
durationi	int	0	≥ 0	Maximum duration of the output
start_sample	int	-1	≥ -1	Number of the first audio sample that should be passed to the output
end_sample	int	—	≥ 0	Number of the first audio sample that should be dropped again

FFmpeg also names these options (use the parameter shown above): start → starti, end → endi, duration → durationi.

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