Update app.py

app.py

@@ -112,7 +112,7 @@ def merge_video(music, img_list):
     print('wav audio converted to mp3 audio' )
     print('now getting duration of this mp3 audio' )
     #getting audio clip's duration
-    audio_length = int(MP3(music).info.length)
+    audio_length = int(MP3(mp3file_name).info.length)
     print('Audio length is :',audio_length)
     
     file_name = 'video_no_audio.mp4'