diff --git a/apps/ecm/service.py b/apps/ecm/service.py
index 5a10ec47..cabaf5fd 100644
--- a/apps/ecm/service.py
+++ b/apps/ecm/service.py
@@ -603,16 +603,23 @@ def get_area_from_point(x: int, y: int, floorNo: str, area_fix_id):
 def snap_and_analyse(vchannel: TDevice, algo_codes: list, opl: Opl = None):
     global_img_o = dhClient.snap(vchannel.code, raise_exception=False)
     happen_time = timezone.now()
+    ckey = 'vchannel_' + vchannel.id
+    cvalue = cache.get(ckey, {})
     if global_img_o is None:  # 说明视频抓拍失败
-        ckey = 'vchannel_' + vchannel.id
-        cvalue = cache.get(ckey, None)
         if cvalue:
             try:
-                cvalue.update({'snap': 'fail', 'snap_time':  datetime.strftime("%Y-%m-%d %H:%M:%S")})
-                cache.set(ckey, cvalue)
+                cvalue.update({'snap': 'fail', 'snap_time':  datetime.now().strftime("%Y-%m-%d %H:%M:%S")})
+                cache.set(ckey, cvalue, timeout=60)
             except:
                 pass
         return
+    else:
+        if cvalue:
+            try:
+                cvalue.update({'snap': 'success', 'snap_time':  datetime.now().strftime("%Y-%m-%d %H:%M:%S")})
+                cache.set(ckey, cvalue, timeout=60)
+            except:
+                pass
     ec_codes = ai_analyse_2(algo_codes, global_img=global_img_o)  # 算法处理返回的事件结果
     if ec_codes:
         # 获取本次所有发生事件种类
diff --git a/apps/ecm/tasks.py b/apps/ecm/tasks.py
index 6458f58b..20b4ec8c 100644
--- a/apps/ecm/tasks.py
+++ b/apps/ecm/tasks.py
@@ -137,7 +137,7 @@ def monitor_check(vc_ids = []):
         ckey = 'vchannel_' + vc.id
         if algo_codes:
             tid = str(uuid.uuid4())
-            cache.set(ckey, {'id': tid, 'algo_codes': algo_codes, 'start_time':  datetime.strftime("%Y-%m-%d %H:%M:%S")})
+            cache.set(ckey, {'id': tid, 'algo_codes': algo_codes, 'start_time':  datetime.now().strftime("%Y-%m-%d %H:%M:%S")}, timeout=60)
             Thread(target=loop_and_analyse, args=(vc, tid), daemon=True).start()
         else:
             cache.delete(ckey)