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Say image A is a static portrait drawing of someone. You'd like to make an animation that has no movement of the artwork, but just alternating re-colorations of the portrait in such a way that it changes the hue of the image with the same smoothness of pulling the Hue slider in an image editor back and forth between, say, red and blue.

Which free software will allow this to be done, ideally without having to lay out each frame between red and blue, one-by-one, as a .gif so maybe .mp4 even?

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Any non-linear video editor will do. There are several free. Try the first one. Is very lightweight.

Open Shot

This next one has a little weird sub-directory system, but it is reasonably lightweight too.

VSDC

From here, they are overkill for what you need but will get the job done.

Hit Film Express (When downloading move the Price slider to the left)

Blender

Davinci Resolve

Simply put one image on one channel and another on a second channel and choose the fade-in or fade-out tool as needed.

Here is a capture from the first option.

One image over the other and right click enter image description here

There are several ways to do that in each application, so you might need to look at the documentation or google a tutorial.

One image over the other on the same channel enter image description here

This will not animate the hue slider. You need to manually prepare the different keyframes or images for the transitions.

You can also do this on PowerPoint with the dissolve transition between slides.


For the real deal

Use Blender. It is pretty complicated because you need to configure a ton of things. But the basic setup is this:

The red circles are places where you need to pay attention for your specific question.

  1. Import your image as planes
  2. Add a hue node
  3. Select a keyframe and fix a hue status (2 again)
  4. Add a keyframe and change and fix the hue status
  5. Configure your output. You will have an image sequence, which you can export as gif on some other software.

enter image description here

enter image description here

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  • 2 out of the 3 answers here are propagating individual frames one hue at a time :-/
    – user610620
    Feb 7 at 23:27
  • No. You define some keyframes. Not all of them. Only let's say changes in hue every 20%. From there you can make the transition of 50 frames if you want. But the last example is fully automatic. ;-)
    – Rafael
    Feb 7 at 23:36

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