RGB THINGIE!

readme.md

you need imagemagick

and I think it only works on linux not sure

either way, I am not responsible if it deletes all your files

oh_yes.py

# CLI ARGS: file resizeX resizeY framesCount delay

import sys, os, shutil
from subprocess import call

if len(sys.argv) < 6:
    print("E.")
    exit(1)

try:
    print("Cleaning cache")
    shutil.rmtree("cache/")
except FileNotFoundError:
    print("Cache was already gone")


os.mkdir("cache/")
print("Resizing file to target resolution")

call("convert " + sys.argv[1] + " -scale " + sys.argv[2] + "x" + sys.argv[3] + " cache/initial.png", shell=True)
print("Done")

print("Applying hue changes")
frames = int(sys.argv[4])

print("| Calculating step...")
step = float(200 / float(frames))

print("| Running hue change")

for i in range(1, frames):
    call("convert cache/initial.png -modulate 100,100," + str(i * step + 100) + " cache/hue" + str(i).zfill(10) + ".png", shell=True)
    print("| | " + str(i))

print("Removing initial resized file to avoid confusing magick")

os.unlink("cache/initial.png")

print("Combining into GIF. This may take a long time")

call("convert -loop 0 -delay " + sys.argv[5] + " cache/hue*.png  " + sys.argv[1] + ".gif", shell=True)

print("Done")