diff --git a/biz/prison/indoor_biz.py b/biz/prison/indoor_biz.py
index 73235c0..e4527fa 100644
--- a/biz/prison/indoor_biz.py
+++ b/biz/prison/indoor_biz.py
@@ -14,7 +14,7 @@ RTSP_FPS = 10  # 视频流目标FPS
 ALERT_PUSH_INTERVAL = 5  # 相同报警5秒内仅推送1次
 ALERT_PUSH_URL = "http://123.57.151.210:10000/picenter/websocket/test/process"
 # 消失判定：中心点在ROI内消失后，持续无检测的帧数（1.0秒，可微调）
-ROI_LOST_FRAMES_THRESH = int(0.5 * RTSP_FPS)
+ROI_LOST_FRAMES_THRESH = int(0.5 * RTSP_FPS)  # todo: 从frame改为时间
 
 # ========================= 默认ROI区域配置（当config.yaml未配置时使用） =========================
 DEFAULT_DOOR_ROIS = {