Fix Preset Save

UI/RenderConfigUIManager.cs

@@ -327,7 +327,7 @@ namespace ADOFAIRenderer.UI
                 AudioBitrate = config.AudioConfig.AudioBitrate
             };
 
-            if (_root.Contains(_audioEncodingConfigContainer))
+            if (_audioEncodingConfigContainer != null && _root.Contains(_audioEncodingConfigContainer))
             {
                 _root.Remove(_audioEncodingConfigContainer);
             }
@@ -372,9 +372,14 @@ namespace ADOFAIRenderer.UI
             // 3. 샘플 레이트 로우
             var sampleRateRow = CreateRow();
             var sampleRateLabel = CreateFormLabel("샘플 레이트(Hz)");
+            var sampleRateStr = tempAudioConfig.AudioSampleRate.ToString();
+            if (sampleRateStr != "44100" && sampleRateStr != "48000")
+            {
+                sampleRateStr = "44100";
+            }
             var sampleRateDropdown = new DropdownField(
                 new List<string> { "44100", "48000" },
-                tempAudioConfig.AudioSampleRate.ToString()
+                sampleRateStr
             );
             sampleRateRow.Add(sampleRateLabel);
             sampleRateRow.Add(sampleRateDropdown);
@@ -498,6 +503,7 @@ namespace ADOFAIRenderer.UI
                 config.RandomSeed = null;
 
             RenderManager.Instance.Configuration.VideoConfig ??= GenerateEncodingConfig();
+            RenderManager.Instance.Configuration.AudioConfig ??= GenerateAudioEncodingConfig();
             
             RenderManager.Instance.SetupCaptureDirectory();
             RenderManager.Instance.SetupGameScene();
@@ -569,6 +575,9 @@ namespace ADOFAIRenderer.UI
                 }
             }
 
+            config.VideoConfig ??= GenerateEncodingConfig();
+            config.AudioConfig ??= GenerateAudioEncodingConfig();
+
             RenderManager.Instance.Configuration = config;
         }
 
@@ -921,6 +930,7 @@ namespace ADOFAIRenderer.UI
                     }
 
                     currentConfig.VideoConfig = RenderManager.Instance.Configuration.VideoConfig ?? GenerateEncodingConfig();
+                    currentConfig.AudioConfig = RenderManager.Instance.Configuration.AudioConfig ?? GenerateAudioEncodingConfig();
 
                     PresetManager.SavePreset(presetName, currentConfig);
                     nameField.value = string.Empty;