Add autocat.py.

autocat.py

@@ -0,0 +1,24 @@
+import glob
+import os
+import sys
+import tempfile
+import time
+
+if len(sys.argv) < 3:
+    raise ValueError()
+
+output_filename = sys.argv.pop(-1)
+patterns = sys.argv[1:]
+
+names = [name for pattern in patterns for name in glob.glob(pattern)]
+names = [os.path.abspath(x) for x in names]
+cat_lines = [f'file \'{x}\'' for x in names]
+cat_text = '\n'.join(cat_lines)
+cat_file = tempfile.TemporaryFile('w', encoding='utf-8', delete=False)
+cat_file.write(cat_text)
+cat_file.close()
+
+cmd = f'ffmpeg -f concat -safe 0 -i {cat_file.name} -c copy "{output_filename}"'
+os.system(cmd)
+
+os.remove(cat_file.name)