Added NVDIA gpu check

Encoder/EncoderService.cs

@@ -1,4 +1,6 @@
+using System.Diagnostics;
 using FFMpegCore;
+using FFMpegCore.Helpers;
 using Microsoft.Extensions.Options;
 
 namespace Encoder;
@@ -81,6 +83,20 @@ public class EncoderService : BackgroundService, IEncoderService {
         job.Status = JobStatus.InProgress;
         var file = job.FilePath;
         string outputPath = Path.Combine(options.TemporaryFilesPath, Path.GetFileName(job.FilePath));
+        
+        // Determine if an NVDA graphics card is available for hardware acceleration
+        ProcessStartInfo psi = new ProcessStartInfo {
+            FileName = Path.Combine(options.FfmpegPath, "ffmpeg.exe"),
+            Arguments = @"-hide_banner -init_hw_device ""list""",
+            CreateNoWindow = true,
+            UseShellExecute = true,
+            RedirectStandardOutput = true
+        };
+        using Process ffmpeg = Process.Start(psi)!;
+        string output = await ffmpeg.StandardOutput.ReadToEndAsync(cancellationToken);
+        await ffmpeg.WaitForExitAsync(cancellationToken);
+        bool nvenc = output.Contains("cuda");
+        
         IEncodingStrategy strategy = job.RequestedEncoding switch {
             EncoderType.H264 => new H264EncodingStrategy(file, outputPath, job),
             EncoderType.HEVC => new HEVCEncodingStrategy(file, outputPath, job),