Oopps, forgot to add multitrack file

BizHawk.MultiClient/movie/MultitrackRecording.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace BizHawk.MultiClient
+{
+    public class MultitrackRecording
+    {
+        public bool isActive;
+        public bool[] RecordingPlayer;
+    }
+}