+ if (!_export_started) {
+ _export_started = true;
+ set_transport_speed (1.0, 0, false);
+ butler_transport_work ();
+ g_atomic_int_set (&_butler->should_do_transport_work, 0);
+ post_transport ();
+ return 0;
+ }
+
+ _engine.main_thread()->get_buffers ();