diff --git a/JianGongYun/TRTC/LiveClassroom.cs b/JianGongYun/TRTC/LiveClassroom.cs
index 20cdc23..4887763 100644
--- a/JianGongYun/TRTC/LiveClassroom.cs
+++ b/JianGongYun/TRTC/LiveClassroom.cs
@@ -283,10 +283,10 @@ namespace JianGongYun.TRTC
                 if (liveWinMode.IsLive && !liveWinMode.AudioRecordRunning)
                 {
                     liveWinMode.AudioRecordRunning = true;
-                    var time = Util.TimeStr();
-                    var pars = new TRTCAudioRecordingParams { filePath = Path.Combine(RecoderDir, $"{time}audio.wav") };
+                    //var time = Util.TimeStr();
+                    var pars = new TRTCAudioRecordingParams { filePath = Path.Combine(RecoderDir, $"temp_audio.wav") };
                     var res = lTRTCCloud.startAudioRecording(ref pars);
-                    Console.WriteLine(res);
+                    //Console.WriteLine(res);
                 }
             }
         }
@@ -328,7 +328,7 @@ namespace JianGongYun.TRTC
             var delay = 1000 / (int)fps;//每帧时间
             var delayEqualize = 0;//每帧时间补偿，在性能和其他因素影响下delay的时间不一定充足
             var _recoderDir = RecoderDir;
-            var videoFile = Path.Combine(_recoderDir, $"{Util.TimeStr()}_video.avi");
+            var videoFile = Path.Combine(_recoderDir, $"temp_video.avi");
             //var videoFrameTemp = Path.Combine(_recoderDir, $"videoFrameTemp.bmp");
             var backHeight = BackgroundFrame.Rows;//画面高度
             var backWidth = BackgroundFrame.Cols;//画面宽度
@@ -441,26 +441,30 @@ namespace JianGongYun.TRTC
 
                     Skip2:
 
-                    //Cv2.ImShow("preview", BackgroundFrame);
-                    //Cv2.WaitKey(1);
-                    //BackgroundFrame.SaveImage(videoFrameTemp);
-                    //var temp = Cv2.ImRead(videoFrameTemp);
                     var temp = BackgroundFrame.CvtColor(ColorConversionCodes.BGRA2BGR);
                     vw.Write(temp);
                     temp.Dispose();
                     stopwatch.Stop();
                     var aa = $"video frame run {stopwatch.ElapsedMilliseconds}";
-                    Debug.Print(aa);
+                    //Debug.Print(aa);
                     Console.WriteLine(aa);
                     var sleep = delay - (int)stopwatch.ElapsedMilliseconds;//每帧时间减去每帧处理时间为sleep时间
                     if (sleep < 0)//如果处理时间超过了每帧时间，记录下来
                     {
                         delayEqualize += sleep;
                     }
-                    sleep += delayEqualize;//理论休眠时间再去掉补偿时间
-                    if (sleep > 0)
+                    if (delayEqualize < 0 && sleep > 0)
                     {
-                        Thread.Sleep(sleep);
+                        delayEqualize += sleep;
+                        if (delayEqualize > 0)
+                        {
+                            delayEqualize = 0;
+                        }
+                    }
+                    var lastsleep = sleep + delayEqualize;//理论休眠时间再去掉补偿时间
+                    if (lastsleep > 0)
+                    {
+                        Thread.Sleep(lastsleep);
                     }
                 }
                 BackgroundFrame?.Dispose();
@@ -527,21 +531,32 @@ namespace JianGongYun.TRTC
                 VideoViews.Remove(key);
             }
         }
-
         /// <summary>
         /// 重启音频录制
         /// </summary>
-        public static void RestartAudio() { }
+        //public static void RestartAudio() { }
         /// <summary>
         /// 重设主视频（摄像头）
         /// </summary>
-        public static void ResetVideoMain() { }
+        //public static void ResetVideoMain() { }
         /// <summary>
         /// 重设副视频（录屏）
         /// </summary>
-        public static void ResetVideoSub() { }
+        //public static void ResetVideoSub() { }
 
 
+        /// <summary>
+        /// 停止所有实时渲染
+        /// </summary>
+        /// <param name="pause"></param>
+        public static void PauseAllView(bool pause)
+        {
+            foreach (var item in VideoViews)
+            {
+                item.Value.SetPause(pause);
+            }
+        }
+
         private static void CurrentLiveWindow_Closed(object sender, EventArgs e)
         {
             CurrentLiveWindow = null;
diff --git a/JianGongYun/TRTC/ViewModels/SettingWindowViewModel.cs b/JianGongYun/TRTC/ViewModels/SettingWindowViewModel.cs
index 166ea84..86c8702 100644
--- a/JianGongYun/TRTC/ViewModels/SettingWindowViewModel.cs
+++ b/JianGongYun/TRTC/ViewModels/SettingWindowViewModel.cs
@@ -528,7 +528,7 @@ namespace JianGongYun.TRTC.ViewModels
         /// <summary>
         /// 摄像画面帧率
         /// </summary>
-        private uint _LiveFps = 24;
+        private uint _LiveFps = 20;
         public uint LiveFps
         {
             get
@@ -548,7 +548,7 @@ namespace JianGongYun.TRTC.ViewModels
             {
                 _LiveFps = value;
                 storage.SetValue(INI_ROOT_KEY, INI_KEY_LIVE_FPS, value.ToString());//生成保存本地
-                LiveClassroom.ResetVideoMain();//重设参数
+                //LiveClassroom.ResetVideoMain();//重设参数
                 if (PropertyChanged != null)
                 {
                     PropertyChanged(this, new PropertyChangedEventArgs("LiveFps"));
diff --git a/JianGongYun/TRTC/Windows/LiveWindow.xaml.cs b/JianGongYun/TRTC/Windows/LiveWindow.xaml.cs
index 566094b..7f65faf 100644
--- a/JianGongYun/TRTC/Windows/LiveWindow.xaml.cs
+++ b/JianGongYun/TRTC/Windows/LiveWindow.xaml.cs
@@ -52,6 +52,14 @@ namespace JianGongYun.TRTC.Windows
             Rad2.Foreground = color;
             Rad3.Foreground = color;
             Rad4.Foreground = color;
+            //LiveClassroom.PauseAllView(false);//切前台启动实时预览渲染
+
+        }
+
+        protected override void OnDeactivated(EventArgs e)
+        {
+            base.OnDeactivated(e);
+            //LiveClassroom.PauseAllView(true);//切后台停止实时预览渲染
         }
 
         private Window settingWindow;