Houdini 12 Nodes Compositing nodes

Blends frames from two sequences together using a simple linear blend.

This operations blends frames from two sequences together using a simple linear blend. An optional third sequence can be used to specify the blend factor on a per-pixel basis.

Parameters

Blend

Blend Method

When a third input is not attached, a global blend is applied between the 2 inputs.

Use Blend Factor

Out = (1-Blend) Input1 + Blend Input2

Use Blend Weights

Out = Weight1 Input1 + Weight2 Input2

Blend Factor

Globally blends between input one (0) and two (1).

Input 1 Weight

If using blend weights, this specifies the factor to multiply input 1 by.

Input 2 Weight

This specifies the factor to multiply input 2 by.

Normalize Weights

If on, the weights will always be scaled to sum up to 1.

Blend Mask

If a third input is used to control the blending, this menu selects the plane or component to use as the blend mask. Black is input 1, white is input 2.

Invert Blend Mask

If on, black is input 2, while white is input 1.

Merge

Overview

These parameters specify how to build the output sequence when there are differences between the input sequences.

Plane Merge

If the planes in the inputs differ, this specifies what the output planes should be.

Raster Depth

If the raster depth for a given plane differs between inputs, this specifies when the output raster depth for the plane should be.

Frame Range

If the frame ranges of the inputs differ, this determines what the output range should be.

Frame Rate

If the frame rates of the inputs differ, this determines what the output frame rate should be.

Frame Match

If the frame rates of the inputs differ, this determines which input frame to pick when the cook time doesn’t reside on a frame boundary.

Local variables

L

Sequence length

S

Start of sequence

E

End of sequence

IL

Input sequence length

SR

Sequence frame rate

NP

Number of planes in sequence

W,H

Width and height of image

I

Image index (0 at start frame)

IT

Image time (0 at start frame)

AI

Current plane array index

PI

Current plane index

PC

Num of channels in current plane

CXRES

Composite Project X resolution

CYRES

Composite Project Y resolution

CPIXA

Composite Project pixel aspect ratio

CDEPTH

Composite Project raster depth

CBP

Composite Project black point

CWP

Composite Project white point

Examples

Load | Launch

.../examples/nodes/cop2/blend/Wipe.otl

This example demonstrates a simple wipe effect using the Blend COP. The wipe transition is created by inputting an animated alpha mask into the Blend COP.

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