因为工作需要去研究了下png的压缩，发现转换成webp可以小很多，但是webp在手机上的解码速度比png的解码速度慢很多。出于进几年手机设备的处理器的性能也不错了，所以准备两套方案。
在网上搜索了一些资料发现了http://www.linuxfromscratch.org/blfs/view/svn/general/libwebp.html这个和https://pngquant.org/这个。
恩，我不会说了，反正第三方库的网站在这了，参数什么的自己用help看。下面是我的代码：
1.png压缩
1 import os
2 import os.path
3
4 root_path = os.getcwd()+ os.sep
5 exe_path = "E:\workSpace\pngTest\pngquant.exe"
6
7 # full path
8 def check_file(file):
9 dic = os.path.splitext(file)
10 if dic[1] == ".png":
11 return True
12 return False
13
14 def is_file(path):
15 return os.path.isfile(path)
16
17 def do_common(path):
18 common = exe_path + " -f --quality 100 --ext .png --speed 1 " + path
19 print("*" * 10 + "\n" + path)
20 os.system(common)
21
22
23 def walk_dir():
24 for root, dir_names, file_names in os.walk(root_path):
25 for file_name in file_names:
26 full_path = os.path.join(root, file_name)
27 if is_file(full_path):
28 if check_file(full_path):
29 do_common(full_path)
30 else:
31 walk_dir(full_path)
32
33 if __name__ == "__main__":
34 walk_dir()
2：png转webp
1 import os
2 import os.path
3
4 root_path = os.getcwd()+ os.sep
5 exe_path = '''E:\workSpace\pngTest\webp\libwebp-0.3.1-windows-x64\cwebp.exe'''
6
7 # full path
8 def check_file(file):
9 dic = os.path.splitext(file)
10 if dic[1] == ".png":
11 return True
12 return False
13
14 def is_file(path):
15 return os.path.isfile(path)
16
17 def do_common(path):
18 dir_name = os.path.dirname(path)
19 file = os.path.basename(path)
20 dic = os.path.splitext(file)
21 file_name = dic[0]
22 file_out_name = file_name + "_webp"
23 ext = dic[1]
24 file_out = os.path.join(dir_name, file_out_name + ".webp")
25
26 common = exe_path + " -preset drawing -q 100 -alpha_q 100 -quiet " + path + " -o " + file_out
27 print("*" * 10 + "\n" + path)
28 os.system(common)
29
30 os.remove(path)
31 print("#" * 10 + "\n" + file_out)
32 os.rename(file_out, path)
33
34
35
36 def walk_dir():
37 for root, dir_names, file_names in os.walk(root_path):
38 for file_name in file_names:
39 full_path = os.path.join(root, file_name)
40 if is_file(full_path):
41 if check_file(full_path):
42 do_common(full_path)
43 else:
44 walk_dir(full_path)
45
46 if __name__ == "__main__":
47 walk_dir()
如果不符合你的需求，可以自己去改代码！
转载请注明出处