Zoneplate

Video Single output Source

Generate zone-plate.

FFmpeg filter: zoneplate — the official reference.

Generate a stream. Zoneplate 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 Zoneplate(…));

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
size	string	320x240	—	set video size
rate	string	25	—	set video rate
duration	int	-1	≥ -1	set video duration
sar	string	—	—	set video sample aspect ratio
precision	int	10	4–16	set LUT precision
xo	int	0	—	set X-axis offset
yo	int	0	—	set Y-axis offset
to	int	0	—	set T-axis offset
k0	int	0	—	set 0-order phase
kx	int	0	—	set 1-order X-axis phase
ky	int	0	—	set 1-order Y-axis phase
kt	int	0	—	set 1-order T-axis phase
kxt	int	0	—	set X-axis*T-axis product phase
kyt	int	0	—	set Y-axis*T-axis product phase
kxy	int	0	—	set X-axis*Y-axis product phase
kx2	int	0	—	set 2-order X-axis phase
ky2	int	0	—	set 2-order Y-axis phase
kt2	int	0	—	set 2-order T-axis phase
ku	int	0	—	set 0-order U-color phase
kv	int	0	—	set 0-order V-color phase

FFmpeg also names these options (use the parameter shown above): s → size, r → rate, d → duration.

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