Overlay (Video)

This effect can combine several tracks by using the so called Overlayer. This is a basic internal device normally used by CINELERRA-GG INFINITY to create the dissolve transitions and for compositing the final output of every track onto the output bitmap. The Overlayer has the ability to combine one or several image layers on top of a bottom layer. It can do this combining of images in several different (and switchable) output modes such as Normal, Additive, Subtractive, Multiply (Filter), Divide, Max and Replace. For a detailed list refer to the on Overlays chapter – PorterDuff.

The overlay plugin enables the use of this Overlayer device in the middle of any plugin stack, opening endless filtering and processing possibilities. It is only useful as a shared plugin (i.e. a multitrack plugin). To use the overlay plugin:

  1. Add the effect to Track A.
  2. Choose attach effect from the context menu of another track (Track B).
  3. Choose Track A: Overlay as a shared plugin.
  4. Manipulate the plugin parameters in Track A.

The CINELERRA-GG Community, 2021
https://www.cinelerra-gg.org