this->rect.x = ( this->window_width - this->rect.w ) / 2;
this->rect.y = ( this->window_height - this->rect.h ) / 2;
+ this->rect.x -= this->rect.x % 2;
mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
mlt_properties_set_int( this->properties, "rect_y", this->rect.y );