(main:22786): GLib-GObject-WARNING **: invalid (NULL) pointer instance
(main:22786): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
(main:22786): GLib-GObject-WARNING **: invalid (NULL) pointer instance
(main:22786): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
(main:22786): GLib-GObject-WARNING **: invalid (NULL) pointer instance
(main:22786): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
(main:22786): GStreamer-CRITICAL **: gst_object_ref_sink: assertion 'GST_IS_OBJECT (object)' failed
(main:22786): GStreamer-CRITICAL **: gst_element_get_bus: assertion 'GST_IS_ELEMENT (element)' failed
(main:22786): GStreamer-CRITICAL **: gst_bus_add_watch_full: assertion 'GST_IS_BUS (bus)' failed
(main:22786): GStreamer-CRITICAL **: gst_bus_set_sync_handler: assertion 'GST_IS_BUS (bus)' failed
(main:22786): GStreamer-CRITICAL **: gst_object_ref: assertion 'object != NULL' failed
(main:22786): GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
(main:22786): GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
(main:22786): GStreamer-CRITICAL **: gst_object_ref: assertion 'object != NULL' failed
(main:22786): GStreamer-CRITICAL **: gst_element_set_state: assertion 'GST_IS_ELEMENT (element)' failed
(main:22786): GLib-GObject-CRITICAL **: g_object_get: assertion 'G_IS_OBJECT (object)' failed
(main:22786): GStreamer-CRITICAL **: gst_element_set_state: assertion 'GST_IS_ELEMENT (element)' failed
(main:22786): GStreamer-CRITICAL **: gst_bus_set_sync_handler: assertion 'GST_IS_BUS (bus)' failed
(main:22786): GStreamer-CRITICAL **: gst_object_unref: assertion 'object != NULL' failed
(main:22786): GStreamer-CRITICAL **: gst_object_unref: assertion 'object != NULL' failed