[Feature Request] Apply "remove duplicates" only in the selected frames

[Diogo]

Is your feature request related to a problem? Please describe.
No

Describe the solution you'd like
The action "remove duplicates" could identify a selected group of frames to apply the action, instead of applying to all frames.

Describe alternatives you've considered
I tried to remove the frame range I would like to keep and then remove duplicates, but can't obtain the correct result.

Additional context
I recorded a gif with a range of images that I would like to keep, even if they are similar. But there is another range of frames with very similar images that I would like to remove the duplicates. This is the context of this feature request.