A disc blur filter with advanced channel and masking options. The areas produced by a disc blur algorithm have a circular shape that is more defined compared to the output of gaussian blur. Please note that this effect is very resource-intentsive and may render slower than the standard blur.
Effect Parameters
Frame Margin
The margin available around the frame. It is useful to increase this value when the effect renders pixels outside the area of the input frame. This parameter is only available in Motion and After Effects, since variable-sized output frames are not supported by Final Cut Pro or Final Cut Express.
Presets
Presets contain a snapshot of the plug-in parameters. The Presets control lets you choose among one of the presets built into the plug-in, save current parameter values to a preset file, or load an existing preset file from disk.
A preset file saved to disk via the "Save As" button can be loaded from another instance of the same plug-in by clicking the "Open" button. Presets generated in one host can also be loaded from the same plug-in when used in a different host.
Radius
The radius of the gaussian blur.
Channels
This popup menu lets you pick the color channels that are affected by the blur. In addition to the usual combinations of the Red, Green and Blue channels, this parameter also lets you pick the Chroma and Luminance values.
Repeat Edges
Controls whether pixels that are accessed outside the edges of the frame have the value of the closest edge rather than black. This option prevents transparent black pixels from bleeding into the picture when the effect is applied. This option may negatively affect rendering times on older hardware configurations.
Mask
By default, the effect is applied to the entire image. The Mask parameter group gives you options for applying the effect only to specific parts of the image.
Mask Popup Menu
This popup menu lets you choose mask shape. The default setting is "None", which means that the effect is applied to the entire image. The available options include the most common shapes used for masking out effects. You may also supply your own mask shape by choosing the "Use Custom Mask" option in this parameter and dropping your own media into the "Custom Mask" image well parameter.
 Oval |  Rectangular |  Gradient |
 Bar |  Ring |  Custom Mask |
Custom Mask
This image well lets you supply your own mask shape when the "Use Custom Mask" option is set in the Mask popup menu parameter. Mask shapes should be grayscale images.
Mask Center
The position of the mask shape on the frame.
Mask Scale
The scaling factory of the mask.
Mask Aspect Ratio
The aspect ratio of the mask shape. The default value of 1 will generate a circle when the current shape is "Oval", and a square if the current shape is "Rectangular". An aspect ratio of 1 will also ensure that any custom mask image you supply via the image well is maintained at its native aspect ratio.
Mask Angle
The angle of rotation of the mask.
Mask Softness
Controls the smoothness of the transition between the in and out areas of the mask shape (indicated by white and black, respectively). When using a custom mask shape, this parameter controls a gaussian blur applied to the image to soften its color values.
Mask Invert
Controls whether the shape defined by the current settings is inverted. For example, an "Oval" mask will apply the effect inside the oval shape. By enabling this option, the effect will be applied outside the oval, hence simulating a common vignette.
Mask Preview
When this parameter is enabled, the effect renders a preview of the mask shape. This mode is helpful in setting up a precise mask shape when finalizing the effect setup.
Correct for Aspect Ratio
Scales the image to its natural display aspect ratio before the effect is applied. This parameter guarantees that geometric features in the effect appear undistorted when the footage is viewed at its display aspect ratio.
This parameter should be enabled for most footage whose display aspect ratio differs from the native aspect ratio of the codec, e.g. NTSC DV frames recorded at 720x480 pixels and displayed at 4:3 (640x480 pixels), or HDV frames recorded at 1440x1080 and displayed at 16:9 (1920x1080 pixels).
Disable this option if you have already taken steps to adjust the frame aspect ratio and/or notice that this parameter is causing unwanted distortion in your footage rather than preventing it.