减少队列中帧的数量，降低延迟

biz/checkpoint/checkpoint_biz.py

@@ -725,7 +725,7 @@ class FrameProcessorWorker(threading.Thread):
 
                 # 抽帧控制
                 if ts - self.last_ts.get(cam_id, 0) < target_interval:
-                    self.raw_queue.task_done()
+                    # self.raw_queue.task_done()
                     continue
                 self.last_ts[cam_id] = ts
 
@@ -793,9 +793,10 @@ class FrameProcessorWorker(threading.Thread):
                     # logger.info(f"[PERF] Camera {cam_id} - Total: {total_time:.1f}ms | "
                     #            f"Detect: {detect_time:.1f}ms | "
                     #            f"Encode: {encode_time:.1f}ms | ")
-                self.raw_queue.task_done()
 
             except Exception as e:
                 logger.error(f"[ERROR] Frame processing failed for camera {cam_id if 'cam_id' in locals() else 'unknown'}: {e}")
                 logger.exception("Exception details:")  # 打印完整的堆栈跟踪
                 # 继续处理下一帧，不要退出循环
+            finally:
+                self.raw_queue.task_done()