diff --git a/UI/FFmpegDownloadUI.cs b/UI/FFmpegDownloadUI.cs
index 0bd0574..b65af45 100644
--- a/UI/FFmpegDownloadUI.cs
+++ b/UI/FFmpegDownloadUI.cs
@@ -25,8 +25,8 @@ namespace ADOFAIRenderer.UI
         private bool _isDownloading;
         private string DownloadUrl => Application.platform switch
         {
-            RuntimePlatform.WindowsPlayer => "https://github.com/BtbN/FFmpeg-Builds/releases/download/latest/ffmpeg-master-latest-win64-gpl-shared.zip", 
-            _ => "https://github.com/BtbN/FFmpeg-Builds/releases/download/latest/ffmpeg-master-latest-linux64-gpl-shared.tar.xz"
+            RuntimePlatform.WindowsPlayer => "https://github.com/BtbN/FFmpeg-Builds/releases/download/autobuild-2026-05-31-13-22/ffmpeg-N-124714-g49a77d37be-win64-gpl-shared.zip", 
+            _ => "https://github.com/BtbN/FFmpeg-Builds/releases/download/autobuild-2026-05-31-13-22/ffmpeg-N-124714-g49a77d37be-linux64-gpl-shared.tar.xz"
         };
         
         private System.Threading.CancellationTokenSource? _cts;
@@ -37,15 +37,31 @@ namespace ADOFAIRenderer.UI
             var userLibs = MelonEnvironment.UserLibsDirectory;
             if (!Directory.Exists(userLibs)) return false;
 
-            var searchPattern = Application.platform switch
+            string[] searchPatterns = Application.platform switch
             {
-                RuntimePlatform.WindowsPlayer => "avcodec-*.dll",
-                RuntimePlatform.OSXPlayer => "libavcodec.*.dylib",
-                _ => "libavcodec.so*"
+                RuntimePlatform.WindowsPlayer => new[]
+                {
+                    "avcodec-*.dll", "avformat-*.dll", "avutil-*.dll", "swscale-*.dll", "swresample-*.dll"
+                },
+                RuntimePlatform.OSXPlayer => new[]
+                {
+                    "libavcodec.*.dylib", "libavformat.*.dylib", "libavutil.*.dylib", "libswscale.*.dylib", "libswresample.*.dylib"
+                },
+                _ => new[]
+                {
+                    "libavcodec.so*", "libavformat.so*", "libavutil.so*", "libswscale.so*", "libswresample.so*"
+                }
             };
-            
-            var files = Directory.GetFiles(userLibs, searchPattern);
-            return files.Length > 0;
+
+            foreach (var pattern in searchPatterns)
+            {
+                if (Directory.GetFiles(userLibs, pattern).Length == 0)
+                {
+                    return false;
+                }
+            }
+
+            return true;
         }
 
         public static void ShowDownloadUI()
diff --git a/Util/FFmpeg/FFmpegNativeEncoder.cs b/Util/FFmpeg/FFmpegNativeEncoder.cs
index 0fc5c47..0f87ef0 100644
--- a/Util/FFmpeg/FFmpegNativeEncoder.cs
+++ b/Util/FFmpeg/FFmpegNativeEncoder.cs
@@ -789,6 +789,11 @@ namespace ADOFAIRenderer.Util.FFmpeg
                     _isInitialized = true;
                     _loggedConversionMode = false;
                 }
+                catch (NotSupportedException ex)
+                {
+                    Dispose();
+                    throw new Exception("FFmpeg 네이티브 라이브러리(DLL)를 로드할 수 없습니다. UserLibs 폴더의 FFmpeg DLL 파일(avcodec, avformat 등)이 누락되었거나 손상되었는지 확인하고, UserLibs 폴더의 FFmpeg DLL 파일들을 삭제한 후 게임을 재시작하세요.", ex);
+                }
                 catch (Exception)
                 {
                     // 초기화 도중 실패 시 부분 할당된 리소스를 모두 정리합니다.