diff --git a/src/zm_event.cpp b/src/zm_event.cpp
index 424fb839a..323229da7 100644
--- a/src/zm_event.cpp
+++ b/src/zm_event.cpp
@@ -1329,7 +1329,7 @@ void EventStream::runStream()
             {
                 delta_us = (unsigned int)(frame_data->delta * 1000000);
                 if ( effective_fps < base_fps )
-                    delta_us = (delta_us * base_fps)/effective_fps;
+                    delta_us = (unsigned int)((delta_us * base_fps)/effective_fps);
                 send_frame = true;
             }
         }
diff --git a/src/zm_monitor.cpp b/src/zm_monitor.cpp
index 8077b0224..ec60745a2 100644
--- a/src/zm_monitor.cpp
+++ b/src/zm_monitor.cpp
@@ -3568,7 +3568,7 @@ void MonitorStream::runStream()
             }
             frame_count++;
         }
-        usleep( (1000000 * ZM_RATE_BASE)/((base_fps?base_fps:1)*abs(replay_rate*2)) );
+        usleep( (unsigned long)((1000000 * ZM_RATE_BASE)/((base_fps?base_fps:1)*abs(replay_rate*2))) );
         if ( ttl )
         {
             if ( (now.tv_sec - stream_start_time) > ttl )
diff --git a/src/zm_mpeg.cpp b/src/zm_mpeg.cpp
index 1ed87fe2c..27c6ce61d 100644
--- a/src/zm_mpeg.cpp
+++ b/src/zm_mpeg.cpp
@@ -67,7 +67,7 @@ void VideoStream::SetupFormat( const char *p_filename, const char *p_format )
 	snprintf( ofc->filename, sizeof(ofc->filename), "%s", filename );
 }
 
-void VideoStream::SetupCodec( int colours, int width, int height, int bitrate, int frame_rate )
+void VideoStream::SetupCodec( int colours, int width, int height, int bitrate, double frame_rate )
 {
 	pf = (colours==1?PIX_FMT_GRAY8:PIX_FMT_RGB24);
 
@@ -102,14 +102,14 @@ void VideoStream::SetupCodec( int colours, int width, int height, int bitrate, i
 		   of which frame timestamps are represented. for fixed-fps content,
 		   timebase should be 1/framerate and timestamp increments should be
 		   identically 1. */
-		c->time_base.den = frame_rate;
-		c->time_base.num = 1;
+		c->time_base.den = (int)(frame_rate*100);
+		c->time_base.num = 100;
 #else
 		/* frames per second */
 		c->frame_rate = frame_rate;
 		c->frame_rate_base = 1;
 #endif
-		c->gop_size = frame_rate/2; /* emit one intra frame every half second or so */
+		//c->gop_size = frame_rate/2; /* emit one intra frame every half second or so */
 		c->gop_size = 12;
 		if ( c->gop_size < 3 )
 			c->gop_size = 3;
@@ -233,7 +233,7 @@ void VideoStream::OpenStream()
 	av_write_header(ofc);
 }
 
-VideoStream::VideoStream( const char *filename, const char *format, int bitrate, int frame_rate, int colours, int width, int height )
+VideoStream::VideoStream( const char *filename, const char *format, int bitrate, double frame_rate, int colours, int width, int height )
 {
 	if ( !initialised )
 	{
diff --git a/src/zm_mpeg.h b/src/zm_mpeg.h
index 8c6b7ba43..ff363bb39 100644
--- a/src/zm_mpeg.h
+++ b/src/zm_mpeg.h
@@ -54,11 +54,11 @@ protected:
 	static void Initialise();
 
 	void SetupFormat( const char *p_filename, const char *format );
-	void SetupCodec( int colours, int width, int height, int bitrate, int frame_rate );
+	void SetupCodec( int colours, int width, int height, int bitrate, double frame_rate );
 	void SetParameters();
 
 public:
-	VideoStream( const char *filename, const char *format, int bitrate, int frame_rate, int colours, int width, int height );
+	VideoStream( const char *filename, const char *format, int bitrate, double frame_rate, int colours, int width, int height );
 	~VideoStream();
 	const char *MimeType() const;
 	void OpenStream();
diff --git a/src/zm_stream.cpp b/src/zm_stream.cpp
index 0b9c45621..487477820 100644
--- a/src/zm_stream.cpp
+++ b/src/zm_stream.cpp
@@ -60,7 +60,7 @@ void StreamBase::updateFrameRate( double fps )
     while( effective_fps > maxfps )
     {
         effective_fps /= 2.0;
-        frame_mod *= 2.0;
+        frame_mod *= 2;
     }
     Debug( 3, "aEFPS:%.2f, aFM:%d", effective_fps, frame_mod );
 }