W3fdif

Video Single output Transform

Apply Martin Weston three field deinterlace.

FFmpeg filter: w3fdif — 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   = $video->addFilter(new W3fdif(…));
$result = $node->outputs()[0];

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

$result = $video->apply(new W3fdif(…));

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
filter	W3fdifFilter	complex	simple, complex	specify the filter
mode	W3fdifMode	field	frame, field	specify the interlacing mode
parity	W3fdifParity	auto	tff, bff, auto	specify the assumed picture field parity
deint	W3fdifDeint	all	all, interlaced	specify which frames to deinterlace

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Maps to FFmpeg’s w3fdif filter. Verified against ffmpeg n7.1.1.