Add ffmpeg version to startup output and log file.

OF DL/Program.cs

@@ -748,6 +748,61 @@ public class Program
 				{
 					config.FFmpegPath = config.FFmpegPath.Replace(@"\", @"\\");
 				}
+
+				// Get FFmpeg version
+				try
+				{
+					var processStartInfo = new System.Diagnostics.ProcessStartInfo
+					{
+						FileName = config.FFmpegPath,
+						Arguments = "-version",
+						RedirectStandardOutput = true,
+						RedirectStandardError = true,
+						UseShellExecute = false,
+						CreateNoWindow = true
+					};
+
+					using (var process = System.Diagnostics.Process.Start(processStartInfo))
+					{
+						if (process != null)
+						{
+							string output = await process.StandardOutput.ReadToEndAsync();
+							await process.WaitForExitAsync();
+
+							// Log full output
+							Log.Information("FFmpeg version output:\n{Output}", output);
+
+							// Parse first line for console output
+							string firstLine = output.Split('\n')[0].Trim();
+							if (firstLine.StartsWith("ffmpeg version"))
+							{
+								// Extract version string (text between "ffmpeg version " and " Copyright")
+								int versionStart = "ffmpeg version ".Length;
+								int copyrightIndex = firstLine.IndexOf(" Copyright");
+								if (copyrightIndex > versionStart)
+								{
+									string version = firstLine.Substring(versionStart, copyrightIndex - versionStart);
+									AnsiConsole.Markup($"[green]ffmpeg version detected as {version}[/]\n");
+								}
+								else
+								{
+									// Fallback if Copyright not found
+									string version = firstLine.Substring(versionStart);
+									AnsiConsole.Markup($"[green]ffmpeg version detected as {version}[/]\n");
+								}
+							}
+							else
+							{
+								AnsiConsole.Markup($"[yellow]ffmpeg version could not be parsed[/]\n");
+							}
+						}
+					}
+				}
+				catch (Exception ex)
+				{
+					Log.Warning(ex, "Failed to get FFmpeg version");
+					AnsiConsole.Markup($"[yellow]Could not retrieve ffmpeg version[/]\n");
+				}
 			}
 			else
 			{