static gboolean
sigusr1_cb (gpointer user_data)
{
  GstEvent *event;

g_print ("doing force_key encoder\n");

  event =gst_video_event_new_downstream_force_key_unit(
          GST_CLOCK_TIME_NONE, GST_CLOCK_TIME_NONE,
          GST_CLOCK_TIME_NONE, TRUE, 0);
  gst_element_send_event (pipeline, event);

  return TRUE;
}