python 調用第三方庫壓縮png或者轉換成webp，pythonwebp

python 調用第三方庫壓縮png或者轉換成webp，pythonwebp

因為工作需要去研究了下png的壓縮，發現轉換成webp可以小很多，但是webp在手機上的解碼速度比png的解碼速度慢很多。出於進幾年手機裝置的處理器的效能也不錯了，所以準備兩套方案。

在網上搜尋了一些資料發現了http://www.linuxfromscratch.org/blfs/view/svn/general/libwebp.html這個和https://pngquant.org/這個。

恩，我不會說了，反正第三方庫的網站在這了，參數什麼的自己用help看。下面是My Code：

1.png壓縮

 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 True12     return False13 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 " + path19     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轉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 True12     return False13 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_out27     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，可以自己去改代碼！

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