前言 {#前言}

这段时间，想着把以后在博客网站上的图片都换成webp，压缩加，加载也能快一点。但是不知道有什么好的工具批量生成。

最后搜了一下，发现python是有库的，那就很简单了，接下来直接看代码。

正文 {#正文}

import os
from PIL import Image
def convert_images_to_webp(input_folder, output_folder, quality=80):
"""
Convert all non-WebP images in the input_folder to WebP format and save them to output_folder.
Existing WebP images are skipped.
Args:
- input_folder (str): The folder containing images to convert.
- output_folder (str): The folder where converted WebP images will be saved.
- quality (int): The quality of the converted WebP images, default is 80.
"""

# Check if output folder exists, if not, create it
if not os.path.exists(output_folder):
    os.makedirs(output_folder)

# Iterate over all files in the input folder
for filename in os.listdir(input_folder):
    if filename.lower().endswith(('.png', '.jpg', '.jpeg', '.tiff', '.bmp', '.gif')):
        # Construct the full file path
        file_path = os.path.join(input_folder, filename)
        # Open the image
        image = Image.open(file_path)
        # Convert and save the image in WebP format
        webp_filename = os.path.splitext(filename)[0] + '.webp'
        webp_path = os.path.join(output_folder, webp_filename)
        image.save(webp_path, 'webp', quality=quality)
        print(f"Saved {filename}")
    elif filename.lower().endswith('.webp'):
        webp_path = os.path.join(output_folder, filename)
        with open(file_path, 'rb') as file:
            with open(webp_path, 'wb') as output_file:
                output_file.write(file.read())
        print(f"Skipping existing WebP file: {filename}")

print(f"All non-WebP images from {input_folder} have been converted and saved to {output_folder}")

if name == 'main':
convert_images_to_webp('photos', 'photos/webp2')

注释都很清楚了，这里就说下重点。

主要流程就是将非webp的图片转换后丢到指定目录，已经是webp的就直接丢过去。

有三个参数，input_folder, output_folder, quality

input_folder

你要转换的图片文件夹

output_folder

转换后输出的路径

quality

图片压缩质量，默认80，一般也不用改。

要注意的是，权限要给够，不然可能复制失败。

效果如下： {#效果如下}