extern mlt_position mlt_multitrack_clip( mlt_multitrack self, mlt_whence whence, int index );
extern void mlt_multitrack_close( mlt_multitrack self );
extern int mlt_multitrack_count( mlt_multitrack self );
+extern void mlt_multitrack_refresh( mlt_multitrack self );
extern mlt_producer mlt_multitrack_track( mlt_multitrack self, int track );
#endif