Update app.py

app.py

@@ -19,6 +19,7 @@ import cv2
 # folder_url = f"https://drive.google.com/drive/folders/1UtKgzKjFAOmZkhNK-OYT0caJ_w2XAnib"
 # gdown.download_folder(url=folder_url, output="pretrained_weights", quiet=False)
 
+import os
 import sys
 from src.utils.video import extract_audio
 from elevenlabs_utils import ElevenLabsPipeline