Update app.py

app.py

@@ -88,8 +88,8 @@ class VideoAnalytics:
         """Transcribe speech from an audio file."""
         try:
             with sr.AudioFile(path) as source:
-                audio_listened = r.record(source)
-                text = r.recognize_google(audio_listened)
+                audio_listened = self.r.record(source)
+                text = self.r.recognize_google(audio_listened)
             return text
         except sr.UnknownValueError as e:
             logging.error(f"Speech recognition could not understand audio: {e}")