OverlayYou can optionally add an overlay image or sequence of overlay images on a scene.Motion blur
An overlay image is composed of pixels that have alpha values (transparency level), so you can add a subtitle or a logo on the sequence with nice transparency effect.
Click either on "Single Image" or "Sequence" to define a still overlay image or animated overlay.
For animated overlay, you just have to select one the files of the image sequence, QVM will find others.
The "Loop" option specifies that the overlay sequence will loop during all the scene. If you don't check it, the last image will be used to finish the scene, like a still image. So if you don"t want any loop you may want to add an extra completely transparent image at the end of your animation.
The "Operation" option lets you use sequence or animation files that do not have transparency at all. The combination is done using either Add, Substract or Multiply operation. Each pixel of the overlay source is respectively added to, substracted to or multiplied by the value of each pixel of the scene source.
See Title scenes section to discover how to import Flash animations.
This effect creates trails for objects that moves in the scene. Use the slider to change the trailing effect.
MonochromaticThis one will convert the scene into a monochromatic scene that is removing colors preserving luminance. The resulting luminance is mapped to a given color so it gives an overall hue for the scene. You can change hue with red/green/blue sliders, keep in mind that the resulting test square show the medium hue of the scene, don't make it too dark.Picture In Picture
A black/white movie is obtained by choosing a 50% grey (all sliders centered).
This effect allows to include a scene into another scene. Note: the imported scene won't have any effect, sequence is imported as is.
Select the source sequence, using the menu list that contains all already defined scenes. The imported scene is certainly a sence that should not appear in the movie except using this effect. If so, just invalidate the source in the main scene list (by clicking on the green triangle).
Adjusting the place where the source scene will appear:
You can distord the PIP by unchecking the "Keep aspect ratio" option. Resizing won't be constrained to initial aspect ratio.
- click and drag corners to resize PIP.
- click and drag the middle crosshair to move the PIP.
Luma
This a video intensity correction effect. This allows to change video intensity response like brightness contrast corrections, but in an accurate way. The effect window shows a response curve on which use can place and move points to get a custom luma correction.
This kind of effect allows for example to make dark parst of the scene brighter or darker, or bright parts to get darker or brighter. User can then emphasize explosions or emphasize shadows. You can also achieve gamma correction.
To add a point just click somewhere on the grid. You can move points by dragging them.
When moving a point, if one gets the same absciss value as another point it is automatically removed. So to delete a point, move it over a neighbour point. You can't remove end points, you can't even move them along the abciss axis.
You can obtain the following response curve:
It tends to overbright bright pixels and some dark pixels.
Hint: always avoid saturation, some pixels may change colors as a result.
Copyright Swift-Tools 2002