diff --git a/Sources/Video.FFMPEG/VideoFileWriter.cpp b/Sources/Video.FFMPEG/VideoFileWriter.cpp
index d9ad7f47..197b4979 100644
--- a/Sources/Video.FFMPEG/VideoFileWriter.cpp
+++ b/Sources/Video.FFMPEG/VideoFileWriter.cpp
@@ -31,7 +31,7 @@ namespace AForge { namespace Video { namespace FFMPEG
 
 static void write_video_frame( WriterPrivateData^ data );
 static void open_video( WriterPrivateData^ data );
-static void add_video_stream( WriterPrivateData^ data, int width, int height, int frameRate, int bitRate,
+static void add_video_stream(WriterPrivateData^ data, int width, int height, double frameRate, int bitRate,
 							  enum libffmpeg::CodecID codec_id, enum libffmpeg::PixelFormat pixelFormat );
 
 // A structure to encapsulate all FFMPEG related private variable
@@ -71,18 +71,18 @@ void VideoFileWriter::Open( String^ fileName, int width, int height )
 	Open( fileName, width, height, 25 );
 }
 
-void VideoFileWriter::Open( String^ fileName, int width, int height, int frameRate )
+void VideoFileWriter::Open(String^ fileName, int width, int height, double frameRate)
 {
 	Open( fileName, width, height, frameRate, VideoCodec::Default );
 }
 
-void VideoFileWriter::Open( String^ fileName, int width, int height, int frameRate, VideoCodec codec )
+void VideoFileWriter::Open( String^ fileName, int width, int height, double frameRate, VideoCodec codec )
 {
 	Open( fileName, width, height, frameRate, codec, 400000 );
 }
 
 // Creates a video file with the specified name and properties
-void VideoFileWriter::Open( String^ fileName, int width, int height, int frameRate, VideoCodec codec, int bitRate )
+void VideoFileWriter::Open(String^ fileName, int width, int height, double frameRate, VideoCodec codec, int bitRate)
 {
     CheckIfDisposed( );
 
@@ -374,7 +374,7 @@ static libffmpeg::AVFrame* alloc_picture( enum libffmpeg::PixelFormat pix_fmt, i
 }
 
 // Create new video stream and configure it
-void add_video_stream( WriterPrivateData^ data,  int width, int height, int frameRate, int bitRate,
+void add_video_stream( WriterPrivateData^ data,  int width, int height, double frameRate, int bitRate,
 					  enum libffmpeg::CodecID codecId, enum libffmpeg::PixelFormat pixelFormat )
 {
 	libffmpeg::AVCodecContext* codecContex;
diff --git a/Sources/Video.FFMPEG/VideoFileWriter.h b/Sources/Video.FFMPEG/VideoFileWriter.h
index 43b221ce..ce5a8122 100644
--- a/Sources/Video.FFMPEG/VideoFileWriter.h
+++ b/Sources/Video.FFMPEG/VideoFileWriter.h
@@ -90,9 +90,9 @@ namespace AForge { namespace Video { namespace FFMPEG
 		///
 		/// <exception cref="System::IO::IOException">Thrown if no video file was open.</exception>
 		///
-		property int FrameRate
+		property double FrameRate
 		{
-			int get( )
+			double get()
 			{
 				CheckIfVideoFileIsOpen( );
 				return m_frameRate;
@@ -202,7 +202,7 @@ namespace AForge { namespace Video { namespace FFMPEG
 		/// codec.</note></para>
 		/// </remarks>
 		///
-		void Open( String^ fileName, int width, int height, int frameRate );
+		void Open(String^ fileName, int width, int height, double frameRate);
 
         /// <summary>
         /// Create video file with the specified name and attributes.
@@ -226,7 +226,7 @@ namespace AForge { namespace Video { namespace FFMPEG
         /// <exception cref="VideoException">A error occurred while creating new video file. See exception message.</exception>
         /// <exception cref="System::IO::IOException">Cannot open video file with the specified name.</exception>
         /// 
-		void Open( String^ fileName, int width, int height, int frameRate, VideoCodec codec );
+		void Open(String^ fileName, int width, int height, double frameRate, VideoCodec codec);
 
         /// <summary>
         /// Create video file with the specified name and attributes.
@@ -255,7 +255,7 @@ namespace AForge { namespace Video { namespace FFMPEG
         /// <exception cref="VideoException">A error occurred while creating new video file. See exception message.</exception>
         /// <exception cref="System::IO::IOException">Cannot open video file with the specified name.</exception>
         /// 
-		void Open( String^ fileName, int width, int height, int frameRate, VideoCodec codec, int bitRate );
+		void Open(String^ fileName, int width, int height, double frameRate, VideoCodec codec, int bitRate);
 
         /// <summary>
         /// Write new video frame into currently opened video file.
@@ -304,7 +304,7 @@ namespace AForge { namespace Video { namespace FFMPEG
 
 		int m_width;
 		int m_height;
-		int	m_frameRate;
+		double	m_frameRate;
 		int m_bitRate;
 		VideoCodec m_codec;