Life

Video Single output Source

Create life.

FFmpeg filter: life — the official reference.

Generate a stream. Life is a source — it has no input, so you create a stream from it rather than applying it to one:

$video = \FFmpeg\VideoStream::generate(new Life(…));

apply() and addFilter() do not apply to source filters (there is nothing to attach them to).

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
filename	string	—	—	set source file
size	string	—	—	set video size
rate	string	25	—	set video rate
rule	string	B3/S23	—	set rule
random_fill_ratio	float	0.61803398874989	0–1	set fill ratio for filling initial grid randomly
random_seed	int	-1	≥ -1	set the seed for filling the initial grid randomly
stitch	bool	true	—	stitch boundaries
mold	int	0	0–255	set mold speed for dead cells
life_color	string	white	—	set life color
death_color	string	black	—	set death color
mold_color	string	black	—	set mold color

FFmpeg also names these options (use the parameter shown above): f → filename, s → size, r → rate, ratio → random_fill_ratio, seed → random_seed.

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