mlt_properties_set_data( properties, "producer", producer, 0, ( mlt_destructor )mlt_producer_close, NULL );
// Now attach normalising filters
+ last = create_filter( tractor, last, "deinterlace" );
last = create_filter( tractor, last, "rescale" );
last = create_filter( tractor, last, "resize" );
last = create_filter( tractor, last, "resample" );