diff --git a/funclip/videoclipper.py b/funclip/videoclipper.py
index 14097e5..9475b08 100644
--- a/funclip/videoclipper.py
+++ b/funclip/videoclipper.py
@@ -152,6 +152,11 @@ def video_recog(self, video_filename, sd_switch='no', hotwords="", output_dir=No
             base_name, _ = os.path.splitext(video_filename)
             clip_video_file = base_name + '_clip.mp4'
             audio_file = base_name + '.wav'
+
+        if video.audio is None:
+            logging.error("No audio information found.")
+            sys.exit(1)
+
         video.audio.write_audiofile(audio_file)
         wav = librosa.load(audio_file, sr=16000)[0]
         # delete the audio file after processing
@@ -441,4 +446,4 @@ def main(cmd=None):
 
 
 if __name__ == '__main__':
-    main()
\ No newline at end of file
+    main()