extern mlt_filter mlt_producer_filter( mlt_producer self, int index );
extern mlt_producer mlt_producer_cut( mlt_producer self, int in, int out );
extern int mlt_producer_is_cut( mlt_producer self );
+extern int mlt_producer_is_mix( mlt_producer self );
extern mlt_producer mlt_producer_cut_parent( mlt_producer self );
+extern int mlt_producer_optimise( mlt_producer self );
extern void mlt_producer_close( mlt_producer self );
#endif