Sapphire Plug-ins for Open Fx: DissolveFlashbulbs


Simulates lots of flashbulbs going off while dissolving between two clips. With many small flashes, can look like a stadium scene. With a few large flashes, works well on a celebrity red carpet clip.

In the Sapphire Transitions effects submenu.


From: Optional. Starts the transition with this clip.

To: Optional. Ends the transition with this clip.


Load Preset: Push-button .
Brings up the Preset Browser to browse all available presets for this effect.

Save Preset: Push-button .
Brings up the Preset Save dialog to save a preset for this effect.

Dissolve Amount: Default: 0, Range: -0.5 to 1.
The transition ratio between the From and To inputs. A value of 0 gives only the From input and a value of 1 gives only the To input. By default this parameter automatically animates from 0 to 1 to perform a complete transition.

Dissolve Speed: Default: 3, Range: 1 or greater.
The speed of the dissolve between the From and To clips. When set to 1, the dissolve takes place over the entire duration of the effect. When set higher, the dissolve is shorter, although the flashbulb ramp-up and ramp-down still takes the entire duration. Setting this to 10 can make the transition snappier and more like a quick cut.

Flash Style: Default: 0, Range: 0 or greater.
Style of flashbulb to use. Several styles are available, or you can try some of the glares for a different look.

Max Flashes: Default: 20, Range: 0 or greater.
Maximum number of flashes per frame, in the middle of the dissolve.

Flash Randomness: Default: 0.2, Range: 0 to 1.
Increase to get more flashes on some frames (up to the values of Flashes) and fewer on others.

Flash Size: Default: 0.4, Range: 0 or greater.
Average size of flashes.

Flash Rel Height: Default: 1, Range: 0 or greater.
Use to squash or stretch flashes.

Brightness: Default: 3, Range: 0 or greater.
Overall brightness of the flashes.

Vary Brightness: Default: 0.2, Range: 0 to 1.
Increase to vary the brightness of each flashbulb in each frame.

Flash Gamma: Default: 1, Range: 0.1 or greater.
Brightens or darkens the midtones of the flashes. Can give a round, hard-edged look, or make the flashes more soft and subtle.

Hold Frames: Integer,  Default: 1, Range: 0 or greater.
Each flash trails off slightly in time, to simulate persistence of vision as well as the effect of the filament cooling off in old-time flashbulbs. Hold Frames controls how long that trail lasts.

Flash Decay Rate: Default: 0.1, Range: 0 to 1.
How quickly the flashes decay over the Hold Frames time. Increase to make them stay on screen brighter, for longer; decrease to make them disappear quickly. Note that you may have to increase Hold Frames to see long-lived flash trails.

Combine: Popup menu,  Default: Add .
Determines how the flash image is combined with the background.
Screen: blends the flashes with the background, which can help prevent overly bright results.
Add: causes the flash image to be added to the background.

Seed: Default: 0.1, 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.

Affect Alpha: Default: 0, Range: 0 or greater.
If this value is positive the output Alpha channel will include some opacity from the flashes. The maximum of the red, green, and blue flash brightness is scaled by this value and combined with the background Alpha at each pixel.

Show Flash Size: Check-box, Default: on.
Turns on or off the screen user interface for adjusting the Flash Size parameter.

See Also:

Sapphire Plug-ins Introduction


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