Legacy ImageMagick Discussions Archive

I'm trying to blend a pattern onto an animtion

For a single frame, it works great,

composite -blend 50x50 frame.jpg pattern.jpg out.jpg

But, if I use an animated gif, it gets flattened.

I've looked into -layers Composite, but it just overlays it without any blending.

Is there anyway to blend an animation without having to disassemble the animation?

IM works on individual images, not animations. An animation is always disassembled before processing.

Without seeing your images, advice is difficult, but:

1. You probably need "-layers coalesce" to make complete individual frames from the input animation.
2. You might want "-layers optimize" at the end.
3. To composite an individual image with each of the animation frames, you probably want a "NULL:" between the frames and image, then "-layers composite".
4. To get a compose other than the default "over", you need a "-compose something".

See http://www.imagemagick.org/script/comma ... php#layers
See also the animation pages linked from http://www.imagemagick.org/Usage/

Is there a compose operator that does blending? I've studied all the examples. NONE of the animation examples involve blending.

I'm trying to make a generic function here that works for any animation, so deconstructing the animation is problematic.

Maybe there is a script here that efficiently deconstructs an animation, acts on each frame, then reassembles the animation?
(frame timing, looping, offsets need to be maintained)

Some operators work fine with animations, some do not.

Best I can suggest is to use -coalesce. Also see http://www.imagemagick.org/Usage/anim_mods/#composite

dognose wrote:Is there a compose operator that does blending?

"convert -list compose" lists the available compose options. Near the top, you should find "Blend". Use it with, for example, "-define compose:args=25" for a 25% blend.