add avif compression script

scripts/imagecompressv2.py

@@ -0,0 +1,63 @@
+#!/usr/bin/python3
+
+# requires imagemagick, avifenc, svt-av1
+
+import os
+import subprocess
+import concurrent.futures
+
+# below this threshold, it won't be compressed with avif
+MIN_FILE_SIZE = 30000
+
+def detect_compressible(fpath):
+    mimetype = subprocess.check_output(["file", "--mime-type", "-b", fpath]).strip().decode('utf-8')
+
+    if mimetype in ('image/png', 'image/jpeg'):
+        return True
+
+    if mimetype == 'image/webp':
+        fileout = subprocess.check_output(["file", fpath]).decode('utf-8')
+        if 'lossless' in fileout:
+            return True
+
+    return False
+
+def compress(fpath):
+    rtpath = '/tmp/'+os.urandom(4).hex()+'.png'
+    subprocess.run(["magick", fpath, rtpath])
+    subprocess.run(["avifenc", rtpath, "--yuv", "420", "--range", "l", "-q", "50", "-c", "svt", "-j", "1", "--speed", "0", "--ignore-exif", "-o", fpath])
+    try:
+        os.remove(rtpath)
+    except:
+        pass
+
+def process_files_in_directory(directory):
+    compressible_files = []
+
+    for root, _, files in os.walk(directory):
+        for fi in files:
+            full_path = os.path.join(root, fi)
+            print(f"Checking file: {full_path}")
+            if os.path.getsize(full_path) < MIN_FILE_SIZE:
+                continue
+            if detect_compressible(full_path):
+                compressible_files.append(full_path)
+
+    return compressible_files
+
+def main(directory, max_workers):
+    compressible_files = process_files_in_directory(directory)
+
+    with concurrent.futures.ThreadPoolExecutor(max_workers=max_workers) as executor:
+        futures = {executor.submit(compress, fpath): fpath for fpath in compressible_files}
+
+        for future in concurrent.futures.as_completed(futures):
+            fpath = futures[future]
+            try:
+                future.result()
+                print(f"Successfully compressed: {fpath}")
+            except Exception as exc:
+                print(f"Compression failed for {fpath}: {exc}")
+
+if __name__ == "__main__":
+    main('../docs/', max_workers=32)