fix zero div error

app.py

@@ -224,8 +224,10 @@ def inference(stream_url, start_time, end_time, count_only_api, api_key,
         count_pred = count_pred / 2
         marks_count_pred = marks_count_pred / 2
         count = np.array(count) / 2
-
-    confidence = (np.mean(periodicity[periodicity > miss_threshold]) - miss_threshold) / (1 - miss_threshold)
+    try:
+        confidence = (np.mean(periodicity[periodicity > miss_threshold]) - miss_threshold) / (1 - miss_threshold)
+    except ZeroDivisionError:
+        confidence = 0
     self_err = abs(count_pred - marks_count_pred)
     self_pct_err = self_err / count_pred
     total_confidence = confidence * (1 - self_pct_err)
@@ -393,7 +395,7 @@ with gr.Blocks(theme='WeixuanYuan/Soft_dark') as demo:
     #                ]
 
     gr.Examples(examples=[
-                        ['https://hiemdall-dev2.azurewebsites.net/api/playlist/rec_DA6NyTCw/vod', '0', '30'],
+                        ['https://hiemdall-dev2.azurewebsites.net/api/playlist/rec_DA6NyTCw/vod', '336', '366'],
                         #[os.path.join(os.path.dirname(__file__), "files", "train14.mp4")],
                         #[os.path.join(os.path.dirname(__file__), "files", "train_17.mp4")],
                         #[os.path.join(os.path.dirname(__file__), "files", "train13.mp4")],