The FrameBlur effect works similar to the normal Blur effect, except that it blurs over a sequence of images. This effect is useful for special effect purposes and for filtering image data over time.

The FrameBlur effect has the following controls:

  • Destination: The post image channel to which the result is stored.

  • Source: The image file channel to be blurred.

  • Blur Start: Defines how many frames before the current image the blur starts. Value 1 starts the processing from the previous image.

  • Blur End: Defines how many frames after the current image the blur ends. For example, if the current image index is 5 and Before=2, After=3, then the result will include the blurred result of images 3, 4, 5, 6, 7 and 8.

  • Range Channel: An optional channel, which controls blur range. When a range channel is selected, the actual range is Before*range_channel ... After*range_channel. For example, if Before is set to 8 frames and the range control channel has a value 0.4 in a certain pixel of the current frame, blurring starts 8*0.4 = 3 frames before the current frame, provided that the respective pixels in preceeding frames have a range control value, which reaches the current frame. By setting the range channel to 0 or 1, one can obtain selective blurring i.e. only selected image areas will be blurred.

[Note] Note
The blur index range may exceed the actual source image range. The effect blurs the images it can find, and missing images do not cause an error. For example, at the end of the animation After indices usually refer to nonexisting images but that is perfectly OK.