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diff --git a/mpeglib/lib/util/syncClockMPEG.h b/mpeglib/lib/util/syncClockMPEG.h
new file mode 100644
index 00000000..1a812c45
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+++ b/mpeglib/lib/util/syncClockMPEG.h
@@ -0,0 +1,77 @@
+/*
+  synchronisation of audio/video (PTS) against system clock stamps (SCR)
+  Copyright (C) 2000 Martin Vogt
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Library General Public License as published by
+  the Free Software Foundation.
+
+  For more information look at the file COPYRIGHT in this package
+
+ */
+
+
+#ifndef __SYNCCLOCKMPEG_H
+#define __SYNCCLOCKMPEG_H
+
+
+#include "syncClock.h"
+
+/**
+   The idea is similar to this:
+   We start a clock and selext a synchronisation mode.
+   (AUDIO,VIDEO,BOTH,NONE)
+   Assume we select AUDIO. When the audio thread delivers an SCR
+   and an PTS, we set the SCR from this set, as the new
+   time reference fo rthis clock.
+   If a video thread enters the class, with an SCR,PTS we wait,
+   or directly return if the PTS is in time or out of time,
+   but we never set the SCR.
+*/
+
+class SyncClockMPEG : public SyncClock {   
+
+  int syncMode;
+  double lastSCR;
+  double lastPTS;
+  double jitter;
+  double oldjitter;
+  timeval_t lastSCR_time;
+  timeval_t lastPTS_time;
+  timeval_t drift_time;
+
+ public:
+  SyncClockMPEG();
+  ~SyncClockMPEG();
+
+  int getSyncMode();
+  void setSyncMode(int syncMode);
+
+  
+  int syncAudio(double pts,double scr);
+  int syncVideo(double pts,double scr,
+		class TimeStamp* earlyTime,class TimeStamp* waitTime);
+
+  void print(char* text);
+
+  double getPTSTime(double* window);
+ private:
+
+  void printTime(timeval_t* a,char* text);
+  void markLastPTSTime(double scr,double pts);
+  int gowait(double scr,double pts,
+	     class TimeStamp* earlyTime,class TimeStamp* waitTime);
+  int a_Minus_b_Is_C(timeval_t* a,timeval_t* b,timeval_t* c);
+  double timeval2Double(timeval_t* a);
+  void double2Timeval(double a,timeval_t* dest);
+
+  void lockSyncClock();
+  void unlockSyncClock();
+
+  abs_thread_mutex_t scrMut; 
+  abs_thread_mutex_t changeMut; 
+
+
+};
+#endif
+