Tblend

Video Single output Transform

Blend successive frames.

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

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

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

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
c0_mode	TblendMode	normal	addition, addition128, and, average, burn, darken, difference, difference128, …	set component #0 blend mode
c1_mode	TblendMode	normal	addition, addition128, and, average, burn, darken, difference, difference128, …	set component #1 blend mode
c2_mode	TblendMode	normal	addition, addition128, and, average, burn, darken, difference, difference128, …	set component #2 blend mode
c3_mode	TblendMode	normal	addition, addition128, and, average, burn, darken, difference, difference128, …	set component #3 blend mode
all_mode	TblendMode	-1	addition, addition128, and, average, burn, darken, difference, difference128, …	set blend mode for all components
c0_expr	string	—	—	set color component #0 expression
c1_expr	string	—	—	set color component #1 expression
c2_expr	string	—	—	set color component #2 expression
c3_expr	string	—	—	set color component #3 expression
all_expr	string	—	—	set expression for all color components
c0_opacity	float	1	0–1	set color component #0 opacity
c1_opacity	float	1	0–1	set color component #1 opacity
c2_opacity	float	1	0–1	set color component #2 opacity
c3_opacity	float	1	0–1	set color component #3 opacity
all_opacity	float	1	0–1	set opacity for all color components

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