Add script for converting webp to jpeg or gif

README.md

@@ -24,6 +24,10 @@ Crop an image on specific coordinates
 
 ## webp
 
+```md
+webp.py
+```
+
 webp to jpg or gif converter
 
 *Notice: This requires [Pillow](https://python-pillow.org/).*

webp.py

@@ -0,0 +1,34 @@
+import os
+from PIL import Image
+
+# taken from https://stackoverflow.com/a/61242086
+def isAnimated(file_path: str) -> bool:
+    with open(file_path, mode='rb') as file_handler:
+        file_handler.seek(12)
+        if file_handler.read(4) == b'VP8X':
+            file_handler.seek(20)
+            is_animated_byte = file_handler.read(1)
+            return (ord(is_animated_byte) >> 1) & 1
+        return False
+
+def isTransparent(img: Image) -> bool:
+    return img.mode == "RGBA" or "transparency" in img.info
+
+def convert(file_path: str, format = 'jpeg', overwrite = False, **params) -> None:
+    new_file_path = file_path[:-4] + format
+    img = Image.open(file_path)
+
+    # JPEG does not support alpha channel
+    if isTransparent(img) and format == 'jpeg':
+        img = img.convert('RGB')
+
+    img.save(new_file_path, format, **params)
+
+    if overwrite:
+        os.remove(file_path)
+
+file_path = ''
+if isAnimated(file_path):
+    convert(file_path, 'gif', quality=95, optimize=True, save_all=True)
+else:
+    convert(file_path, 'jpeg', quality=95, optimize=True, subsampling=0)