diff --git a/Core/RenderManager.cs b/Core/RenderManager.cs
index f59dcda..3474e3c 100644
--- a/Core/RenderManager.cs
+++ b/Core/RenderManager.cs
@@ -63,6 +63,7 @@ namespace ADOFAIRenderer.Core
 
         // Thread and Queue State
         internal SortedList<long, CapturedFrame> ImageQueue = new();
+        internal AutoResetEvent FrameAvailableEvent = new(false);
         public Thread? RenderThread;
         public long passCount;
         public bool endRequested;
@@ -236,6 +237,7 @@ namespace ADOFAIRenderer.Core
                             Length = byteSize
                         };
                     }
+                    FrameAvailableEvent.Set();
                 }
                 
                 renderCheck = false; // 진행 허용
@@ -386,6 +388,7 @@ namespace ADOFAIRenderer.Core
             skipCount = 0;
             endRequested = false;
             endSuccessful = false;
+            FrameAvailableEvent.Reset();
 
             var renderFPS = Configuration.RenderFPS;
             var videoFPS = Configuration.VideoFPS;
@@ -493,7 +496,7 @@ namespace ADOFAIRenderer.Core
                             if (passCount > lastRequestedVideoFrameIndex) break;
                         }
 
-                        Thread.Sleep(1);
+                        FrameAvailableEvent.WaitOne(50);
                     }
 
                     if (isRenderCancelled)
@@ -552,6 +555,7 @@ namespace ADOFAIRenderer.Core
             {
                 isRenderCancelled = true;
             }
+            FrameAvailableEvent.Set();
             skipPressToStart = false;
             _renderSetup = false;
             if (_escapeHandlerObj)
@@ -664,7 +668,7 @@ namespace ADOFAIRenderer.Core
             {
                 foreach (var kvp in ImageQueue.Values)
                 {
-                    if (kvp.ManagedBuffer != null && kvp.ManagedBuffer.Length > 0)
+                    if (kvp.ManagedBuffer is { Length: > 0 })
                     {
                         ArrayPool<byte>.Shared.Return(kvp.ManagedBuffer);
                     }
diff --git a/Util/FrameReader.cs b/Util/FrameReader.cs
index 3ba0dbf..226573d 100644
--- a/Util/FrameReader.cs
+++ b/Util/FrameReader.cs
@@ -151,6 +151,7 @@ namespace ADOFAIRenderer.Util
             {
                 RenderManager.Instance.ImageQueue[frame] = capturedFrame;
             }
+            RenderManager.Instance.FrameAvailableEvent.Set();
         }
         
         public void Dispose()