// and fezzik doesn't overdo it with throwing rocks...
mlt_properties_set( properties, "westley", "was here" );
+ // We need to ensure that all further properties are mirrored in the producer
+ mlt_properties_mirror( properties, mlt_producer_properties( producer ) );
+
// Now, we return the producer of the tractor
producer = mlt_tractor_producer( tractor );
}