Improve Support for Floating-point FPS

Util/VideoFFmpeg.cs

@@ -25,8 +25,8 @@ namespace ADOFAIRenderer.Util
 
         public int Width;
         public int Height;
-        public int FrameRate;
-        public int VideoFPS;
+        public double FrameRate;
+        public double VideoFPS;
         public Codec VideoCodec;
 
         private static string Codec2String(Codec c)
@@ -48,7 +48,7 @@ namespace ADOFAIRenderer.Util
             };
         }
 
-        public VideoFFmpeg(int w, int h, int frame, int videoFrame, Codec codec)
+        public VideoFFmpeg(int w, int h, double frame, double videoFrame, Codec codec)
         {
             Width = w;
             Height = h;