commit 8e6d9e50bca97d68ac80497bdfc13ec3d5b7bddf
Author: Zev Averbach <zev@averba.ch>
Date:   Thu Oct 7 21:33:45 2021 +0200

    first

diff --git a/app/extract_audio b/app/extract_audio
new file mode 100755
index 0000000..65b4d9b
--- /dev/null
+++ b/app/extract_audio
@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+
+from pathlib import Path
+from subprocess import check_output
+from sys import argv as args
+import threading
+
+
+def extract_audio(dir_, fp):
+    return check_output(f"ffmpeg -i {fp} -vn -acodec copy {dir_}{fp.stem}.m4a", shell=True)
+
+
+def main(dir_):
+    threads = []
+    for fp in Path(dir_).iterdir():
+        a = threading.Thread(
+            target=extract_audio,
+            args=(
+                dir_,
+                fp,
+            ),
+        )
+        threads.append(a)
+        a.start()
+    for thread in threads:
+        thread.join()
+
+
+if __name__ == "__main__":
+    dirpath = args[1]
+    main(dirpath)