For gif animation are available 2 modes, replace and combine but as far i know for normal video files only the replace mode is available

If that true, if there is no way to chose the combine mode when exporting to avi or other video format i would love a script to do it, because combine mode allow effect not possible with other methods

the concept is simple, but do manually would be a nightmare, basically the script should

1 take a gimp animation as input call it A
2 create a new image (as container for the output) call this B
3) make all layers of A except the BG INVISIBLE
4) copy the visible from A...paste as BG layer of B
5) make visible in A also the layer above the visible
6) as 4: paste the visible of A as new layer of B
7) as 5, make make another layer above visible in A

and so on and on till the top layer

Or as alternative save the output not as layers of a new image but as a series of frames (this may reduce the risk to create a too huge images that may become to heavy to be saved)

This should allow to use the combine effect also for video, not only for gif

"Filters->Animation->Unoptimize"

???

How unoptimize may allow to save the animation as AVI in combine mode ?

Also unoptmize would do nothing if the image was never optimized, and i don't see why optimize for gif what i want save as .avi

I am missing something obvious or you didn't get well my question ?

Have you tried it?


Wrong!

@ Saulgoode

Not yet, i will try if you are sure but i fear a misunderstanding :

i want preserve the effect in this gif
(NB 10MB file ! ) http://fc06.deviantart.net/fs70/f/2012/ ... 54wies.gif

But exporting the ORIGINAL xcf (not a gif) as AVI but ,instead all i was able to get is this

https://vimeo.com/44652017

That spoils all the effect

EDIT
usually you are right so i am going to try now !

WOW !
from what i see in the layers window ...YOU ARE A GENIUS !..thanks !