diff --git a/reproject/alert.py b/reproject/alert.py
index 0a9fa2d..4df414e 100644
--- a/reproject/alert.py
+++ b/reproject/alert.py
@@ -1,5 +1,3 @@
-
-
 import os
 import queue
 import threading
@@ -19,9 +17,14 @@ class Alert:
         self.upload_thread = None
         self.stop_event = threading.Event()
         self.dropped_frames = 0
+        self.accepting_frames = False
+        self.ended = False
 
     def start(self, width=1920, height=1080, fps=30):
         print(f"Starting alert with {width}x{height}")
+        self.accepting_frames = True
+        self.ended = False
+        self.stop_event.clear()
         read_fd, write_fd = os.pipe()
         self.read_pipe = os.fdopen(read_fd, "rb", buffering=0)
         self.write_pipe = os.fdopen(write_fd, "wb", buffering=0)
@@ -65,8 +68,6 @@ class Alert:
                 while not self.stop_event.is_set() or not self.frame_queue.empty():
                     try:
                         frame = self.frame_queue.get(timeout=0.1)
-                        if frame is None:
-                            break
                         av_frame = av.VideoFrame.from_ndarray(frame, format="bgr24")
                         for packet in self.stream.encode(av_frame):
                             self.container.mux(packet)
@@ -83,6 +84,8 @@ class Alert:
         self.encode_thread.start()
 
     def provide_frame(self, frame):
+        if not self.accepting_frames or self.ended:
+            return
         try:
             self.frame_queue.put(frame, block=True, timeout=0.05)
         except queue.Full:
@@ -94,17 +97,20 @@ class Alert:
                 )
 
     def end(self):
+        if self.ended:
+            return
+        self.ended = True
+        self.accepting_frames = False
         print(
             f"Stopping alert, queued frames: {self.frame_queue.qsize()}, dropped frames: {self.dropped_frames}"
         )
-        self.frame_queue.put(None)
         self.stop_event.set()
 
         # 等待编码线程完成
         if self.encode_thread:
-            self.encode_thread.join(timeout=30)
+            self.encode_thread.join()
             if self.encode_thread.is_alive():
-                print("Warning: Encode thread still running after timeout")
+                print("Warning: Encode thread still running")
             else:
                 print(f"Encode thread completed with {self.frame_count} frames")
 
diff --git a/reproject/main.py b/reproject/main.py
index bd3fc92..a776acd 100644
--- a/reproject/main.py
+++ b/reproject/main.py
@@ -1,5 +1,6 @@
 from calendar import c
 from tracemalloc import stop
+from av import buffer
 import cv2
 import threading
 import time
@@ -61,7 +62,7 @@ def capture_thread():
     """
     采集线程：优化了分发逻辑，对视频流进行降频处理
     """
-    cap = cv2.VideoCapture(0)
+    cap = cv2.VideoCapture(1)
     cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1280)
     cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 720)
 
@@ -438,6 +439,7 @@ def alert_thread(server):
     alert_status = False
     alert_st = ""
     level = 0
+    timett = 0
     while not stop_event.is_set():
         try:
             frame = ana_video_queue.get(timeout=1)
@@ -476,6 +478,15 @@ def alert_thread(server):
                 # no_face_time
                 if data["label"] == "":
                     no_face_time += 1
+                    sleep_time = 0
+                    haqian_time = 0
+                    heart_spe = 0
+                    heart_num = 0
+                    eye_close = False
+                    down_emo_time = 0
+                    pianyi_time = 0
+                else:
+                    no_face_time = 0
 
                 alert_time = now
 
@@ -489,7 +500,7 @@ def alert_thread(server):
                     alert_st += alert_info["pianyi_time"] + "; "
                     pianyi_time = 0
                     level += 1
-                if no_face_time >= 60:
+                if no_face_time >= 30:
                     alert_status = True
                     alert_st += alert_info["no_face_time"] + "; "
                     no_face_time = 0
@@ -509,7 +520,7 @@ def alert_thread(server):
                     alert_status = True
                     alert_st += alert_info["haqian_time"] + ";"
                     level += 1
-                if heart_spe < 60 or heart_spe > 120:
+                if (heart_spe < 60 and timett != 0 and heart_spe != 0) or heart_spe > 120:
                     alert_status = True
                     alert_st += alert_info["heart_spe"] + ";"
                     level += 1
@@ -535,18 +546,38 @@ def alert_thread(server):
                     alert = server.alert(int(time.time()), alert_st, info_level)
                     alert = HookMocker(alert, "http://10.128.48.204:5000/api/osshook")
                     alert.start(width=1280, height=720, fps=30)
-                    for f in buffered_frame:
-                        alert.provide_frame(f)
-                    alert.end()
+                    print(f"upload buffered frames... {buffered_frame.__len__()}")
+                    frames_to_upload = buffered_frame
+                    buffered_frame = []
+                    upload_task = threading.Thread(
+                        target=handle_alert_upload,
+                        args=(frames_to_upload, alert),
+                        daemon=True
+                    )
+                    upload_task.start()                  
                 alert_status = False
                 alert_st = ""
                 buffered_frame = []
                 level = 0
+                timett += 1
         except queue.Empty:
             continue
-        except Exception as e:
-            print(f"[Alert] 错误: {e}")
-            continue
+        # except Exception as e:
+        #     print(f"[Alert] 错误: {e}")
+        #     continue
+
+def handle_alert_upload(frames, _alert_instance):
+    """
+    后台线程：负责将缓存的帧喂给 alert 对象，并执行编码和上传
+    """
+    try:
+        # print("后台上传线程启动...")
+        for f in frames:
+            _alert_instance.provide_frame(f)
+        _alert_instance.end() # 这里阻塞也没关系，因为是在后台线程里
+        # print("后台上传线程结束")
+    except Exception as e:
+        print(f"后台上传出错: {e}")
 
 
 def draw_debug_info(frame, result):