S_Streaks Motion blurs the bright areas of the source into streaks between the From and To transformations. This can be used to create an extended film exposure effect, or simulate soft beams of light. From and To parameters do not refer to time. They describe the two transformations in space that determine the style of blur applied to each frame. In the Sapphire Lighting effects submenu. Inputs: Source:  The current layer.   The clip to be processed. Matte:  Defaults to None.   If provided, the Source is scaled by the values of this input clip before the areas that get streaked are determined. This can be used to selectively remove or reduce the streaks applied to specific areas of the Source.

Parameters:

Center:   X & Y,   Default: [360 243],  Range: any.
The center of rotation and zooming, in screen coordinates relative to the center of the frame. The shift values should be zero for this location to make sense.

From Z Dist:   Default: 1,  Range: 0.001 or greater.
The 'distance' of the From transformation. This zooms about the Center location when Shift is 0. Increase to zoom out, decrease to zoom in.

From Rotate:   Default: 0,  Range: any.
The rotation angle of the From transformation, in degrees, about the center.

From Shift:   X & Y,   Default: [0 0],  Range: any.
The horizontal and vertical translations of the From transformation. This can be used for directional motion. If it is non-zero the center location becomes less meaningful.

To Z Dist:   Default: 0.8,  Range: 0.001 or greater.
The 'distance' of the To transformation. Increase to zoom out, or decrease to zoom in.

To Rotate:   Default: 0,  Range: any.
The rotation angle of the To transformation, in degrees, about the center. Note that if the From and To Rotate angles are very different, the interpolation between them will become less accurate.

To Shift:   X & Y,   Default: [0 0],  Range: any.
The horizontal and vertical translations of the To transformation. This can be used for directional motion. If it is non-zero the center location becomes less meaningful.

Exposure Bias:   Default: 0,  Range: 0 to 1.
Determines the variable amount of exposure along the path between the From and To transformations. A value of 0 causes more exposure at the From end, 0.5 causes equal exposure along the path, and 1.0 causes more exposure at the To end. If you have bright spots on a dark background, a 0 value would cause the processed spots to be brighter at the From end and dark at the To end, and a 1.0 value would cause the opposite.

Streaks Brightness:   Default: 1,  Range: 0 or greater.
Scales the brightness of the streaks.

Threshold:   Default: 0.5,  Range: 0 to 1.
Streaks are generated from locations in the source clip that are brighter than this value. A value of 0.9 causes streaks at only the brightest spots. A value of 0 causes streaks for every non-black area.

Threshold Add Color:   Default rgb: [0 0 0].
This can be used to raise the threshold on a specific color and thereby reduce the streaks generated on areas of the source clip containing that color.

Mix Source Darks:   Default: 1,  Range: 0 to 1.
The dark non-streaked components of the Source are scaled by this amount and added to the result. This allows combining the streaked and non-streaked versions of the source clip.

Mix Source Brights:   Default: 0,  Range: 0 to 1.
The original bright components of the Source that were used to generate the streaks are scaled by this amount and added to the result. This allows combining some non-streaked bright areas of the source clip with the output.

Result Brightness:   Default: 1,  Range: 0 or greater.
Scales the brightness of the result.

Combine:   Popup menu,  Default: Add.
Determines how the streaks are combined with the background.

Add:  causes the streaks to be added to the background.

Screen:  performs a blend function which can help prevent overly bright results.

Wrap:   Popup menu,  Default: No.
Determines the method for accessing outside the borders of the source image.

No:  gives black beyond the borders.

Tile:  repeats a copy of the image.

Reflect:  repeats a mirrored copy. Edges are often less visible with this method.

Streaks Res:   Popup menu,  Default: Full.
Selects the resolution factor for the streaks. This is similar to the general 'Res' factor parameter, but it only affects the streaks: the original mixed with the streaks remains at full resolution. Higher resolutions give better quality, lower resolutions give faster processing.

Full:  Full resolution is used.

1/2:  The streaks are calculated at half resolution.

1/4:  The streaks are calculated at quarter resolution.

Subpixel:   Check-box,  Default: on.
If enabled, uses a better quality but slightly slower method for rendering the streaks.

Blur Matte:   Default: 0,  Range: 0 or greater.
Blurs the Matte input by this amount before using. This can provide a smoother transition between the matted and unmatted areas. It has no effect unless the Matte input is provided.

Invert Matte:   Check-box,  Default: off.
If on, inverts the Matte input so the effect is applied to areas where the Matte is black instead of white. This has no effect unless the Matte input is provided.

Matte Use:   Popup menu,  Default: Luma.
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.

Opacity:   Popup menu,  Default: Normal.
Determines the method used for dealing with opacity/transparency.

All Opaque:  Use this option to render slightly faster when the input image is fully opaque with no transparency (alpha=1).

Normal:  Process opacity normally.

As Premult:  Process as if the image is already in premultiplied form (colors have been scaled by opacity). This option also renders slightly faster than Normal mode, but the results will also be in premultiplied form, which is sometimes less correct.

Show From Transfm: Check-box, Default: off.
Turns on or off the screen user interface for adjusting the From Z Dist and From Rotate parameters.This parameter only appears on AE and Premiere, where on-screen widgets are supported.

Show To Transform: Check-box, Default: off.
Turns on or off the screen user interface for adjusting the To Z Dist and To Rotate parameters.This parameter only appears on AE and Premiere, where on-screen widgets are supported.

Show From Shift: Check-box, Default: off.
Turns on or off the screen user interface for adjusting the Opacity parameter.This parameter only appears on AE and Premiere, where on-screen widgets are supported.

Show To Shift: Check-box, Default: off.
Turns on or off the screen user interface for adjusting the Opacity parameter.This parameter only appears on AE and Premiere, where on-screen widgets are supported.

See Also:

Rays EdgeRays BlurMotion WarpRepeat WarpChroma Sapphire Plug-ins Introduction

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