Converting to AVIF with Python

After checking the blog with PageSpeed Insights, I found that it took a long time to load images.

I realized it was time for an image diet.

I originally used the webp format but discovered that AVIF offers higher compression rates, better compatibility, and even supports GIFs.

So, I decided to compare them.

After converting the png file to AVIF, the size was reduced by 10 times.

Two to three times is one thing, but 10 times is a lot.

I felt it had to be changed.

Using Python, it's possible to convert png to AVIF or vice versa.

First, install the necessary libraries using pip.

pip install pillow pillow_avif imageio

For now, my images are stored in paths like posts/[slug]/*.png.

Therefore, navigate to the path and convert all png files to AVIF.

from PIL import Image
import pillow_avif
import imageio
import pathlib

path = pathlib.Path.cwd()
# Check all files in the current path.
for folder in path.iterdir():
    if folder.is_dir():
        for file in folder.iterdir():
            # If it's a folder, check the files inside.
            # If the extension is jpg, png, etc., execute the conversion.
            if file.suffix in [".jpg", ".png", ".gif", ".PNG", ".JPG", ".jpeg", ".webp"]:
                img = Image.open(file)
                # If it's a gif file, it's definitely an animated image.
                # Save each image as a frame and convert.
                if file.suffix == ".gif" :
                    frames = []
                    frame_count = 0
                    try:
                        while True:
                            current_frame = img.convert('RGB')
                            frames.append(current_frame)
                            img.seek(img.tell() + 1)
                    except EOFError:
                        pass
                    imageio.mimsave(f'{file.parent}/{file.stem}.avif', frames, format='AVIF')
                # Otherwise, just convert and save the extension.
                else:
                    img.save(f'{file.parent}/{file.stem}.avif')