this->process = composite_process;
// Default starting motion and zoom
- mlt_properties_set( properties, "start", arg != NULL ? arg : "0,0:100%x100%" );
+ mlt_properties_set( properties, "start", arg != NULL ? arg : "0/0:100%x100%" );
// Default factory
mlt_properties_set( properties, "factory", mlt_environment( "MLT_PRODUCER" ) );