diff --git a/ISCamRecorder/ISCamera.cs b/ISCamRecorder/ISCamera.cs
index 52a22f7..5a55c6d 100644
--- a/ISCamRecorder/ISCamera.cs
+++ b/ISCamRecorder/ISCamera.cs
@@ -25,6 +25,7 @@
         SinkListener _SinkListener = new SinkListener();
         IFrameQueueBuffer[] _bufferlist = null; // 録画バッファ
         bool _Recoding = false;     // 録画中フラグ
+        DateTime _RecodingBegin;    // 録画開始時間
 
         public float FrameRate { get { return _Fps.FrameRate; } }
 
@@ -105,6 +106,7 @@
             // メモリ確保
             _RecSink.AllocAndQueueBuffers(framesToCapture);
             // 撮影
+            _RecodingBegin = DateTime.Now;
             while (_Recoding) {
                 if (framesToCapture <= _RecSink.OutputQueueSize + 1) break;
             }
@@ -129,12 +131,14 @@
                 _RecSink.OutputFrameType, (int)frrate, movieRate * 1000);
             writer.Begin();
             // ファイル保存
+            var firstDriverTime = _bufferlist[0].FrameMetadata.DriverFrameFirstPacketTime;
             for (int i = 0; i < _bufferlist.Length; i++) {
                 writer.Write(_bufferlist[i]);
+                var driverTime = _bufferlist[i].FrameMetadata.DriverFrameFirstPacketTime;
+                var frameTime = _RecodingBegin.Add(driverTime - firstDriverTime);
                 //このフレームの最初のパケットをドライバが受信した時刻が格納されます。
-                string strSampleStartTime = _bufferlist[i].FrameMetadata.
-                    DriverFrameFirstPacketTime.ToString(@"hhmmss\.fff");
-                var fileName = $"{_CamID}_{strSampleStartTime}.{imageType.ToLower()}";
+                string strSampleTime = frameTime.ToString(@"HHmmss\.fff");
+                var fileName = $"{_CamID}_{strSampleTime}.{imageType.ToLower()}";
                 var filePath = Path.Combine(outDir2, fileName);
                 switch (imageType) {
                 case "JPG":
diff --git a/ISCamRecorder/MainForm.cs b/ISCamRecorder/MainForm.cs
index cf98c53..dcf46f8 100644
--- a/ISCamRecorder/MainForm.cs
+++ b/ISCamRecorder/MainForm.cs
@@ -243,6 +243,7 @@
                 Directory.CreateDirectory(outputDir);
                 var imageType = CboImageType.Text;
                 // 録画
+                //DateTime recordStartTime = DateTime.Now;
                 Task[] tasks = new Task[4];
                 for (var i = 0; i < _Cameras.Count; i++) {
                     var cam = _Cameras[i];
diff --git a/ISCamRecorder/SensorData.cs b/ISCamRecorder/SensorData.cs
index 0a5f0ac..8bd032f 100644
--- a/ISCamRecorder/SensorData.cs
+++ b/ISCamRecorder/SensorData.cs
@@ -11,12 +11,16 @@
     internal class SensorData {
         readonly string SERIAL_PORT_NAME = "USB シリアル";
 
+        // センサー値
         public Queue<int> Values { get; private set; } = new Queue<int>();
+        // サンプル時間
         public Queue<DateTime> Times { get; private set; } = new Queue<DateTime>();
-        SerialPort _Serial = null;
+
+        SerialPort _Serial = null;      // シリアル通信オブジェクト
         bool _ExitSignal = false;       // 終了シグナル
-        int _QueueLength = 100;
-        public static object Locker = new object();
+        int _QueueLength = 1;           // グラフ表示するサンプル数
+        public static object Locker = new object(); // 受信データの排他制御
+        bool _Recoding = false;         // 記録中フラグ
 
         /// <summary>
         /// 接続
@@ -97,5 +101,9 @@
             }
             return portname;
         }
+
+        public void StartRecoding() {
+
+        }
     }
 }