Справка Houdini на русском Nodes Compositing nodes

Shift compositing node

Shifts an image sequence in time.

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This operation shifts an image sequence in time. An optional second input can be used as a reference, so that this sequence becomes 'linked' to the start or end of the reference sequence and shifts if they change.

This operation does not use any cache memory.

Note

This operator’s parameters can not be animated (as they affect time).

Parameters

Shift Method

Sequences can be shifted in several ways if no reference input is connected.

Relative Shift

Shifts the amount specified by the Shift Value.

Shift Start to Shift Value

Starts at the point specified by Shift Value.

Shift End to Shift Value

Shifts the image sequence such that it ends at the point specified by the Shift Value.

Input Shift

If a reference input is connected, several different ways of linking the two sequences together can be used. The sequence will always follow any changes in the reference sequence’s start or end time.

Align Start with 2nd Input’s Start

Make the output sequence start at the same time as the sequence attached to input #2.

Align End with 2nd Input’s End

Make the output sequence end at the same time as the sequence attached to input #2.

Shift To Precede 2nd Input

Output sequence will end on the frame just before the second input starts.

Shift To Follow 2nd Input

Output sequence will start on the frame after 2nd input ends.

Shift Value

The amount to shift by, in either frames or seconds.

Units

The shift units, either Frames or Seconds.

Locals

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

See also

Compositing nodes

  • Add

    Adds two images together.

  • Anaglyph

    Creates an anaglyph from a pair of input images.

  • Atop

    Composites the first input (Foreground) over the second (background), but only where the background alpha exists.

  • Average

    Averages the foreground image and the background image.

  • Blend

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

  • Blur

    Blurs an image.

  • Border

    Adds a border to the image.

  • Bright

    Applies a brightness factor and bright shift to the first input.

  • Bump

    Builds a bump map from a plane.

  • Channel Copy

    Copy channels from any of inputs into the output image.

  • Chromakey

    Mask or "key" an image based on its color.

  • Color

    Creates a constant color image.

  • Color Correct

    Applies a variety of color corrections to the image

  • Color Curve

    Adjusts the R,G,B and/or A channels based on a user-defined curve.

  • Color Map

    Maps a range of color to a new range.

  • Color Replace

    Replace a color region in an image with another region.

  • Color Wheel

    Generates a simple HSV color wheel.

  • Composite

    Does a composite (over, under, inside, add, etc) between two images.

  • Contrast

    Increases or decreases the contrast of an image.

  • Convert

    Changes the data format of a plane.

  • Convolve

    Performs a generic convolve on the source image.

  • Corner Pin

    Fits an image into an arbitrary quadrilateral.

  • Corner Ramp

    Generates a four corner ramp.

  • Crop

    Crops an image and changes its resolution.

  • Cryptomatte

    Extracts matte from Cryptomatte image.

  • DSM Flatten

    Flattens a Deep Shadow/Camera Map into a flat 2D raster.

  • Defocus

    Defocuses an image similar to a real camera defocus.

  • Deform

    Deforms an image by moving the underlying UV coordinates.

  • Degrain

    Removes film grain from an image.

  • Deinterlace

    De-interlaces a frame of video by either averaging scanlines or copying a scanline.

  • Delete

    Removes planes or components from an input sequence.

  • Denoise

    Removes white noise from an image.

  • Depth Darken

    Darkens depth boundaries in an image.

  • Depth of Field

    Creates a depth-of-field mask, which describes how out of focus parts of the image are.

  • Diff

    Computes the difference between the foreground image and the background image.

  • Dilate/Erode

    Expands and shrinks mattes.

  • Drop Shadow

    Creates a blurred shadow offset of an image.

  • Edge Blur

    Blurs the edges of an image.

  • Edge Detect

    Detects edges in the input image.

  • Emboss

    Adds a lighting effect to the image by using a bump map.

  • Environment

    Applies an environment map to an image.

  • Equalize

    Equalizes colors by stretching or shifting the image histogram.

  • Error Function Table Generator

    Creates an image containing precomputed error function terms for hair albedo computation

  • Expand

    Expands and shrinks mattes.

  • Extend

    Extends the length of a sequence so that it can be animated beyond its frame range.

  • Fetch

    Fetches a sequence of images from another COP, even in another network.

  • Field Merge

    Merges two fields into one Interlaced Frame.

  • Field Split

    Splits an interlaced frame into two fields per frame (odd and even fields).

  • Field Swap

    Swaps the two fields containing the even and odd scanlines of the frame.

  • File

    Loads image files into Houdini.

  • Flip

    Flips the image horizontally and/or vertically.

  • Fog

    Adds a variety of atmospheric effects to an image, including fog, haze and heat waves.

  • Font

    Renders anti-aliased text.

  • Front Face

    Cleans up flipped normals by making them face the camera.

  • Function

    Performs a variety of mathematical functions on the input image.

  • Gamma

    Applies gamma correction to the image.

  • Geokey

    Keys out parts of the image based on pixel position or normal direction.

  • Geometry

    Renders geometry from a SOP as a single color image.

  • Gradient

    Computes the gradient of an image.

  • Grain

    Adds grain to an image.

  • HSV

    Converts between RGB and HSV color spaces, or applies hue and saturation modifications.

  • Hue Curve

    Adjusts the saturation or luminance of the image based on hue.

  • Illegal Pixel

    Detects illegal pixels, like NAN and INF, in images.

  • Inside

    Restricts the foreground color to the area of the background’s alpha matte.

  • Interleave

    Interleaves image sequences.

  • Invert

    Applies a photographic pixel inversion to the image.

  • Layer

    Layers a series of inputs together by compositing them one by one on the background image (input 1).

  • Levels

    Adjusts black point, white point, and midrange to increase, balance, or decrease contrast.

  • Lighting

    Adds a light to the image.

  • Limit

    Limits the pixel range at the high end, low end or both.

  • Lookup

    Applies a lookup table to the input.

  • Loop

    Cooks the subnet COPs multiple times in a loop, accumulating the results.

  • Luma Matte

    Sets the alpha to the luminance of the color.

  • Lumakey

    Keys the image based on luminance (or similar function).

  • Mask

    Masks out an area of an image.

  • Max

    Outputs the maximum value of the foreground and background images for each pixel, which tends to lighten the image.

  • Median

    Applies a 3 x 3 or 5 x 5 median filter to the input image.

  • Merge

    Merges the planes of several inputs together.

  • Metadata

    Applies metadata to an image sequence.

  • Min

    Outputs the minimum value of the foreground and background images for each pixel, which tends to darken the image.

  • Mono

    Converts a color or vector into a scalar quantity, like luminance or length.

  • Mosaic

    Takes a sequence of images and combines them into 1 image by tiling them.

  • Multiply

    Multiplies the foreground image with the background image.

  • Noise

    Generates continuous noise patterns.

  • Null

    Does nothing.

  • Outside

    Restricts the foreground color to the area outside of the background’s alpha matte.

  • Over

    Composites the first input (Foreground) over the second (background).

  • Pixel

    Modifies an image’s pixels using expressions.

  • Premultiply

    Allows colour to be converted to or from a premultiplied form.

  • Pulldown

    Performs a pulldown (cine-expand) on the input sequence.

  • Pushup

    Performs a pushup (cine-expand) on the input sequence.

  • Quantize

    Quantizes input data into discrete steps.

  • ROP File Output

    Renders frames out to disk.

  • Radial Blur

    Does a radial or angular blur.

  • Ramp

    Generates a variety of linear and radial ramps, which are fully keyframable.

  • Reference

    Copies the sequence information from its input.

  • Rename

    Change the name a plane.

  • Render

    Renders a mantra output driver directly into a composite network.

  • Reverse

    Simply reverses the frames in the sequence.

  • Rotoshape

    Draws one or more curves or shapes.

  • SOP Import

    Imports a 2d Volume from SOPs as planes into a composite network.

  • Scale

    Changes the resolution of the image.

  • Screen

    Adds two images together, saturating at white like photographic addition.

  • Sequence

    Sequences two or more inputs end to end.

  • Shape

    Generates simple shapes, such as circles, stars and regular N-sided polygons.

  • Sharpen

    Sharpens an image by enhancing the contrast of edges.

  • Shift

    Shifts an image sequence in time.

  • Shuffle

    Shuffle frames around to do out-of-order editing.

  • Sky Environment Map

    Creates sky and ground images for use as environment maps.

  • Snip

    Either removes frames from a sequence or allows you to order them in a user-defined order.

  • Streak Blur

    Streaks an image, adding a motion blur effect.

  • Subnetwork

    Contains networks of other COPs.

  • Subtract

    Subtracts the foreground image from the background image.

  • Switch

    Passes the input of one of its connected inputs through, acting like an exclusive switch.

  • Switch Alpha

    Replaces input 1's alpha with input 2's alpha.

  • Terrain Noise

    Generate noise suitable for terrain height maps.

  • Tile

    Tiles the image sequence with multiple copies of the input image.

  • Time Filter

    Blurs a pixel through several frames.

  • Time Machine

    Uses a second input to time warp the first input on a per pixel basis.

  • Time Scale

    Stretches or compresses a sequence in time.

  • Time Warp

    Warps time by slowing or speeding it up throughout the sequence.

  • Transform

    Translates, rotates and/or scales the input image without changing the image resolution.

  • Trim

    Trims an input sequence in time by adjusting the beginning or the end of the sequence.

  • UV Map

    Creates a UV map.

  • Under

    Composites the first input (Foreground) under the second (background).

  • Unpin

    Extracts an arbitrary quadrilateral area out of the input image.

  • VEX Filter

    Runs a VEX script on its input planes.

  • VEX Generator

    Runs a VEX script on the planes it generates.

  • VOP COP2 Filter

    Contains a VOP network that filters input image data.

  • VOP COP2 Generator

    Contains a VOP network that generates image data.

  • Vector

    Performs vector operations on the input.

  • Velocity Blur

    Blurs an image by using pixel velocity to produce a motion blur effect.

  • Window

    Cuts a small window out of a larger image.

  • Wipe

    Does a wipe between two input sequences.

  • Xor

    Makes two elements mutually exclusive; if their alpha mattes overlap, the overlap is removed.

  • Z Comp

    Does a Z composite of two images.