[request] more color/palette control on GIF writing

[villares]

Using the example code from the documentation, the number of colors seems inadequate. Is there already another way of adjusting output color reduction/quality?

from pathlib import Path
import imageio

input_dir = Path.cwd()
images = [
    imageio.v3.imread(file_path)
    for file_path in sorted(input_dir.iterdir())
    if file_path.suffix.lower() == '.png'
]
if images:
    output_path = input_dir / 'output.gif'
    imageio.v3.imwrite(
        output_path,
        images,
        duration=200,
        loop=0,
    )

Example of a PNG used as frame source (1 of 6):

Example output GIF result:

The other frames, if anyone wants to test/reproduce, are here: villares/sketch-a-day@e3772f4

[Pandede]

PNG supports 24-bits colors while GIF only supports 8-bits colors, I think that's the reason why it is inadequate.

[villares]

Cheers @Pandede, I suppose this is the root problem, but other gif-making tools provide some options on how to choose the 256 color palette, and sometimes offer dithering, for example ...

[Pandede]

Cheers @Pandede, I suppose this is the root problem, but other gif-making tools provide some options on how to choose the 256 color palette, and sometimes offer dithering, for example ...

You may check this repository out: https://github.com/ImageOptim/gifski.