adding whisper feature for duration

whisper_app.py

@@ -39,7 +39,7 @@ class WHISPERModel:
             else:
                 raise("Unable to reach for URL {}".format(audio_path))
         else:
-            self.read_audio(audio_path)
+            audio = self.read_audio(audio_path)
         if audio :
             conv_language = self.get_info(audio)
             if conv_language !='en':
@@ -50,8 +50,8 @@ class WHISPERModel:
                 res = self.model.transcribe(audio)
             audio_duration = audio.shape[0] / SAMPLE_RATE
             text_data['text'] = res['text']
-            text_data['duration'] = audio_duration
-            text_data['language'] = conv_language
+        text_data['duration'] = audio_duration
+        text_data['language'] = conv_language
         return text_data