The gradient effect overlays a smooth color gradient on top of every video frame. It is useful for all sorts of background fills, for partially filtering, adding depth to the image, or for adding moving highlights. The Gradient effect can generate linear or circular color fills / shape. For linear fills, you can choose the angle, for circular fills the center (X, Y) of the created gradient pattern. You can control the slope of the color transition by selecting a transition function (linear, logarithmic, squared) and by changing the start (inner) and stop (outer) radius. Note that both colors used in this color transition can contain an arbitrary Alpha value (transparency). All parameters can be keyed and will be interpolated between keyframes.
The first time you use the plugin it may seem complicated, but if you understand that we have to adjust the gradient from an inner spot we choose to an outer spot we also choose, the work will become easy and fast.
Note: The inner and outer colors are visibly mixed in the gradient area. If you want to make a vignetting of only black, you must set the two colors to black and then make the inner one transparent so that it does not cover the figure.
The CINELERRA-GG Community, 2021