Fix an error when given YouTube URL. Now the app would process the

app.py

@@ -1,4 +1,5 @@
 import os
+import time
 from tsmnet import Stretcher
 import gradio as gr
 from gradio import processing_utils
@@ -41,7 +42,9 @@ def download_yt_audio(url):
         except yt_dlp.DownloadError as error:
             raise gr.Error(f'Failed to download from YouTube: {error}')
 
-    return audio_file
+    new_audio_file = os.path.join(os.path.dirname(audio_file), f'{time.time()}.wav')
+    os.system(f'cp {audio_file} {new_audio_file}')
+    return new_audio_file
 
 
 def prepare_audio_file(rec, audio_file, yt_url):