Pandoc filter to convert all images to webp format

pandoc-filter-convert-images-webp.py

#!/usr/bin/env python

"""
Pandoc filter to convert all images to WebP format.
"""

import os
from pandocfilters import toJSONFilter, Image
from PIL import Image as PILImage

def convert_to_webp(image_path):
    """
    Converts the given image to WebP format and returns the new file path.
    """
    base, ext = os.path.splitext(image_path)
    webp_path = f"{base}.webp"

    try:
        with PILImage.open(image_path) as img:
            img.save(webp_path, format='webp')
        return webp_path
    except Exception as e:
        print(f"Error converting {image_path} to WebP: {e}")
        return image_path

def image_to_webp(key, value, format, meta):
    if key == 'Image':
        attrs, alt_text, [src, title] = value
        webp_src = convert_to_webp(src)
        return Image(attrs, alt_text, [webp_src, title])

if __name__ == "__main__":
    toJSONFilter(image_to_webp)