I could make something along these lines. How long it would take depends on how much time I have for it though, and how complex the program is.
The easiest for me would be something like a command-line program that just takes in a .txt file with your specifications, but I can imagine that it would be a pain to use. I can probably make a GUI program that has some options and lets you see a preview or something. Do you have any sort of outline of what you'd want it to be like? E.g. what kind of options, would it be one frame per image or would some images have multiple frames, etc.
The easiest for me would be something like a command-line program that just takes in a .txt file with your specifications, but I can imagine that it would be a pain to use. I can probably make a GUI program that has some options and lets you see a preview or something. Do you have any sort of outline of what you'd want it to be like? E.g. what kind of options, would it be one frame per image or would some images have multiple frames, etc.