move ffmpeg to dll subdirectory

BizHawk.MultiClient/AVOut/FFmpegWriter.cs

@@ -73,7 +73,11 @@ namespace BizHawk.MultiClient
 		void OpenFileSegment()
 		{
 			ffmpeg = new Process();
-			ffmpeg.StartInfo.FileName = "ffmpeg";
+#if WINDOWS
+			ffmpeg.StartInfo.FileName = System.IO.Path.Combine(PathManager.GetBasePathAbsolute(), "dll", "ffmpeg.exe");
+#else
+			ffmpeg.StartInfo.FileName = "ffmpeg"; // expecting native version to be in path
+#endif
 
 			string filename = String.Format("{0}_{1,4:D4}{2}", baseName, segment, ext);
 

BizHawk.MultiClient/Config.cs

@@ -155,7 +155,7 @@ namespace BizHawk.MultiClient
 		public string PathINTVGROM = Path.Combine(".", "grom.bin");
 		public string PathINTVEROM = Path.Combine(".", "erom.bin");
 
-		public string FFMpegPath = "%exe%/ffmpeg.exe";
+		public string FFMpegPath = "%exe%/dll/ffmpeg.exe";
 
 		// General Client Settings
 		public bool StackOSDMessages = true;