you can fly!? DarkSnow - the Screensaver
part 6 - making an animation loopable

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part 1
-
getting started
part 2
-
making selections & the alpha channel
part 3
-
blurring a selection in the alpha channel
part 4
-
creating an animation
part 5
-
more snow in the foreground
part 6
-
making an animation loopable
part 7
-
save as image sequence
part 8
-
using Irfanview to create the screensaver
part 9
-
more advanced tricks: light diffusion, day for night
part 10
-
shining some light rays from the window
part 11
-
working with frames & adding more drama



Make Loopable

At this time you should have an animation similar to this one:
click here for larger version

When playing the animation, you will notice a sudden jump between last frame and first frame as it cycles through them and loops again and again.


You can reduce this by making the animation loopable. This is done by blending a number of frames out at the end and overlapping them into the first few frames.

Note however that some of this may be the result of saving it as an AVI file with a codec that might not retain all frames: the last or last few frames (or first few) might be missing.

Go to the Animation menu's Frames submenu.

It is also accessible through the Animation toolbar's Filmstrip (if enabled): right-click on the thumbnails in the filmstrip and you'll see the same submenu popup.


Note how you can in fact use this submenu to form in distinct frames to cut and paste them, even on a group of frames (called a block).

There's also a way to reverse the frame sequence (causing the snow flakes to move backwards and up essentially in this case, perhaps more usable for underwater bubbles rising from the ocean floor).

Select the 'Make loopable...' option from the menu.
'From frame' is the frame from which you want to start blending. That frame through the last will be used to blend and fade out over the same number of frames at the start, which will be blending into the animation

In our example here, we're going smack into the middle of the animation: There is currently a total of 50 frames, so we'll do the blending from frame 25 on to the last (frame 49). The remaining frames will be 0 through 24 but the frames from 25 to 49 will appear blending over them. As a result, you won't notice much jumping from last to first frame anymore, since the entire animation is constantly blending into itself, or more precisely: the second half blending over the first half.



next: save as image sequence



part 1
-
getting started
part 2
-
making selections & the alpha channel
part 3
-
blurring a selection in the alpha channel
part 4
-
creating an animation
part 5
-
more snow in the foreground
part 6
-
making an animation loopable
part 7
-
save as image sequence
part 8
-
using Irfanview to create the screensaver
part 9
-
more advanced tricks: light diffusion, day for night
part 10
-
shining some light rays from the window
part 11
-
working with frames & adding more drama





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