we can export!!

src/Utility/Utils.cs

@@ -2,11 +2,14 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Reflection.Metadata.Ecma335;
 using System.Threading.Tasks;
 using Avalonia.Controls;
 using Avalonia.Platform;
 using Avalonia.Platform.Storage;
 using Avalonia.Threading;
+using FFMpegCore;
+using FFMpegCore.Arguments;
 using MercuryConverter.UI;
 
 namespace MercuryConverter.Utility;
@@ -47,4 +50,19 @@ public static class Utils
     /// <param name="path">Forward-slash (/)-separated path to asset.</param>
     /// <returns></returns>
     public static Stream AssetPath(string path) => AssetLoader.Open(new Uri("avares://MercuryConverter/Assets/" + path));
+
+    public static string IIDToMusicFilePath(uint id)
+    {
+        return $"MER_BGM_S{id / 1000:D2}_{id % 1000:D3}";
+    }
+
+    public static bool IsFFMpegAvailable()
+    {
+        // FFMpegArguments
+        //     .FromFileInput("dummy_input.mp4") // Use a dummy input, as it won't be processed
+        //     .OutputToFile("dummy_output.mp4", true, options => options.WithArgument(new CustomArgument("-version"))) // Request FFmpeg version
+        //     .ProcessSynchronously();
+
+        return false;
+    }
 }