Grows, shrinks, or adds noise to the alpha channel of the
Source input. This can be useful for removing blue or green spill
from a chroma key.
In the Sapphire Composite effects submenu.
Source: The current layer. The input clip containing the matte to process. The matte
is assumed to have anti-aliased but hard edges, because very soft
edges might not be affected in a useful way.
- Shrink- Grow+: Default: 0, Range: any.
Amount to grow the matte edges in
approximate pixels, or shrink if negative.
- Edge Softness: Default: 1, Range: 0.01 or greater.
The resulting softness of the edges.
- Post Blur: Default: 0, Range: 0 or greater.
If positive, the result is blurred by this amount.
This is an alternative method for softening the edges.
Popup menu, Default: Triangle.
The type of blur filter to use for the shrink or grow process.
- Box: uses a rectangular shaped filter.
- Triangle: smoother, uses a pyramid shaped filter.
- Gauss: smoothest, uses a gaussian shaped filter.
- Matte Use:
Popup menu, Default: Alpha.
Determines how the Matte input channels are used to make
a monochrome matte.
- Luma: the luminance of the RGB channels is used.
- Alpha: only the Alpha channel is used.
- Invert Matte: Check-box, Default: off.
If enabled, the black and white of the output matte
Popup menu, Default: RGBA.
Selects the format of the output.
- Matte: the processed Matte is output as white.
- RGBA: the Alpha output channel receives the processed
Matte, and the RGB channels are passed through from the input
- RGBA Premult: the Alpha output channel receives the
processed Matte, and the RGB channels receive the input multiplied
by the new Matte. This option can be appropriate if you are
shrinking a matte and need an RGBA result for pre-multiplied
- Matte Premult: the processed Matte is output on all channels.
- Noise Amplitude: Default: 0, Range: 0 or greater.
The amount of noise texture to add to the edges.
- Noise Width: Default: 2, Range: 0 or greater.
The width of the area at the matte edges where the
noise is included. This has no effect unless Noise Amplitude is
- Frequency: Default: 100, Range: 0.1 or greater.
The frequency of the noise. Increase for finer grain
noise, decrease for coarser noise. This has no effect unless Noise
Amplitude is positive.
- Frequency Rel X: Default: 1, Range: 0.01 or greater.
The relative horizontal frequency of the noise.
Increase to stretch the noise vertically, decrease to stretch it
horizontally. This has no effect unless Noise Amplitude is
- Octaves: Integer, Default: 1, Range: 1 to 10.
The number of summed layers of noise. Each octave is
twice the frequency and half the magnitude of the previous. This
has no effect unless Noise Amplitude is positive.
- Seed: Default: 0.23, Range: 0 or greater.
Used to initialize the random number generator. The actual
seed value is not significant, but different seeds give different
results and the same value should give a repeatable result.
- Noise Shift: X & Y, Default: [0 0], Range: any.
The horizontal and vertical translation of
the noise texture.
- Jitter Frames: Integer, Default: 1, Range: 0 or greater.
If this is 0, the noise texture will remain the same
for every frame processed. If it is 1, a new noise texture is used
for each frame. If it is 2, a new noise texture is used for every
other frame, and so on.
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