diff --git a/ISCamRecorder/ISCamera.cs b/ISCamRecorder/ISCamera.cs
index 088e483..242f321 100644
--- a/ISCamRecorder/ISCamera.cs
+++ b/ISCamRecorder/ISCamera.cs
@@ -141,20 +141,21 @@
         /// </summary>
         public void RecordToMemory(float recodingLimit) {
             if (!_Cam.DeviceValid) return;
-            _Recoding = false;
 
-            // メモリ確保
+            // 準備
+            _Recoding = false;
             ClearBuffer();
             var framesToCapture = (int)(recodingLimit * CameraFPS) + 1;
-            _RecSink.AllocAndQueueBuffers(framesToCapture);
             Ready.Set();
             Common.DebugOut($"{_CamID} ready for recoding.");
 
             // 撮影待機
             while (!_Recoding) { Thread.Sleep(0); }
+            Ready.Reset();
 
-            // 撮影
+            // 撮影開始
             Common.DebugOut($"{_CamID} starts recoding.");
+            _RecSink.AllocAndQueueBuffers(framesToCapture);
             while (_Recoding) {
                 if (framesToCapture <= _RecSink.OutputQueueSize + 1) break;
             }