只压缩新增的图片，压缩效果如图：Responsive Image

Responsive Image

操作步骤

1. 将脚本保存到任意位置

compress_images.py

python
 1import os
 2import time
 3from PIL import Image
 4import sys
 5
 6def compress_image(input_path, quality=75):
 7    """
 8    压缩图片并直接覆盖原文件
 9    :param input_path: 输入图片路径
10    :param quality: 压缩质量 (1-100)
11    """
12    try:
13        # 创建临时备份文件
14        backup_path = f"{input_path}.bak"
15        os.rename(input_path, backup_path)
16
17        with Image.open(backup_path) as img:
18            if img.mode != 'RGB':
19                img = img.convert('RGB')
20            img.save(input_path, quality=quality, optimize=True)
21
22        # 删除备份文件
23        os.remove(backup_path)
24        print(f"成功压缩并替换: {input_path}")
25    except Exception as e:
26        print(f"处理 {input_path} 时出错: {str(e)}")
27
28def process_directory(input_dir, quality=75, timestamp_file='.compress_timestamp'):
29    """
30    处理目录中新增或修改的图片文件并直接覆盖原文件
31    :param input_dir: 输入目录
32    :param quality: 压缩质量 (1-100)
33    :param timestamp_file: 记录上次压缩时间的文件
34    """
35    supported_extensions = ('.jpg', '.jpeg', '.png', '.webp')
36
37    # 获取上次压缩时间
38    last_compress_time = 0
39    if os.path.exists(timestamp_file):
40        with open(timestamp_file, 'r') as f:
41            last_compress_time = float(f.read())
42
43    # 遍历目录处理文件
44    for root, _, files in os.walk(input_dir):
45        for file in files:
46            if file.lower().endswith(supported_extensions):
47                input_path = os.path.join(root, file)
48                file_mtime = os.path.getmtime(input_path)
49                if file_mtime > last_compress_time:
50                    compress_image(input_path, quality)
51
52    # 更新压缩时间记录
53    with open(timestamp_file, 'w') as f:
54        f.write(str(time.time()))
55
56if __name__ == "__main__":
57    if len(sys.argv) < 2:
58        print("用法: python compress_images.py <输入目录> [质量(1-100)] [时间戳文件]")
59        sys.exit(1)
60
61    input_dir = sys.argv[1]
62    quality = int(sys.argv[2]) if len(sys.argv) > 2 else 75
63    timestamp_file = sys.argv[3] if len(sys.argv) > 3 else '.compress_timestamp'
64
65    process_directory(input_dir, quality, timestamp_file)

注意：

  1. 该脚本默认压缩质量为 75，可根据需要自行修改。
  2. 该脚本默认会在当前目录下创建一个.compress_timestamp文件来记录上次压缩时间，可根据需要自行修改。

2. 运行脚本

  1. 默认压缩
bash
1python compress_images.py content
  1. 自定义压缩质量
bash
1python compress_images.py content 85
  1. 自定义时间戳文件
bash
1python compress_images.py content 85 my_timestamp.txt