--- src/gst/parole-gst.c.orig	2019-04-04 12:33:39.000000000 +0200
+++ src/gst/parole-gst.c	2019-08-05 19:09:08.515728933 +0200
@@ -1470,6 +1470,9 @@
         TRACE("Stream status");
         break;
     case GST_MESSAGE_ASYNC_DONE:
+        /* dump graph on preroll */
+        GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (gst->priv->playbin),
+            GST_DEBUG_GRAPH_SHOW_ALL, "parole.async-done");
         if (gst->priv->seeking) {
             gst->priv->seeking = FALSE;
             g_signal_emit(G_OBJECT(gst), signals[MEDIA_SEEKED], 0);