Dynamic pipeline: Trying to dispose object "bin1", but it still has a parent "pipeline".

[Brilliantov Kirill Vladimirovich]

Hello!
I work with GStreamer 0.10.28 on board with FreeScale iMX53 processor 
and I can't change it because I use vendor-specific module for hardware 
encoding video.
I need dynamic change pipeline - plug and unplug bin, follow my code:
GstElement *snapshot = NULL, *f = NULL;
GstPad *snap = NULL, *tee = NULL;
snapshot = gst_bin_new(NULL);
if (NULL == snapshot) {
         ERROR("Failed get snapshot bin!");
	return msg_error_msg("Failed get snapshot bin!");
}
if (!make_snapshot_pipeline(snapshot, w, h, q)) {
	ERROR("Failed build snapshot bin!");
	return msg_error_msg("Failed build snapshot bin!");
}
INFO("Build snapshot bin!");
snap = gst_element_get_pad(snapshot, "snap");
if (NULL == snap) {
	ERROR("Failed get snapshot pad!");
	return msg_error_msg("Failed get snapshot pad!");
}
tee = gst_element_get_request_pad(
		gst_bin_get_by_name(GST_BIN(pipe), "tee"), "src%d");
if (NULL == tee) {
	ERROR("Failed get tee pad!");
	return msg_error_msg("Failed get tee pad!");
}
f = gst_bin_get_by_name(GST_BIN(snapshot), "filesink");
if (NULL == f) {
	ERROR("Failed get filesink element!");
	return msg_error_msg("Failed get filesink element!");
}
INFO("Get filesink element!");
gst_element_set_state(pipe, GST_STATE_PAUSED);
if (!gst_bin_add(GST_BIN(pipe), snapshot)) {
	ERROR("Failed add snapshot to pipeline!");
	return msg_error_msg("Failed add snapshot to pipeline!");
}
INFO("Add snapshot to pipeline!");
if (gst_pad_link(tee, snap)) {
	ERROR("Failed link video and snapshot!");
	return msg_error_msg("Failed link video and snapshot!");
}
INFO("Link video and snapshot!");
while (gst_element_set_state(pipe, GST_STATE_PLAYING) !=
	GST_STATE_CHANGE_SUCCESS) {
	ERROR("Wait state change!");
	g_usleep(500000);
}
.............
/*
  * save snapshot in file
  */
...............
/* unplug snapshot bin */
while (gst_element_set_state(pipe, GST_STATE_NULL) !=
		GST_STATE_CHANGE_SUCCESS) {
	ERROR("Wait change state pipeline after snapshot!");
	g_usleep(500000);
}
/*if (!gst_pad_unlink(tee, snap)) {
	ERROR("Failed unlink snapshot pipe!");
	return msg_error_msg("Failed unlink snapshot pipe!");
}*/
do {
	gst_pad_unlink(tee, snap);
	g_usleep(500000);
	ERROR("Wait unlink tee and snap!");
} while (gst_pad_is_linked(snap));
//gst_element_set_state(snapshot, GST_STATE_NULL);
gst_element_release_request_pad(
	gst_bin_get_by_name(GST_BIN(pipe), "tee"), tee);
gst_object_unref(tee);
gst_object_unref(f);
gst_object_unref(snap);
gst_object_unref(snapshot);
gst_element_set_state(pipe, GST_STATE_PLAYING);

This code work, but everytime I get error messages:
(camerad:2246): GStreamer-CRITICAL **:
Trying to dispose object "bin1", but it still has a parent "pipeline".
You need to let the parent manage the object instead of unreffing the 
object directly.
Bin number everytime is increase.

How can I solve this problem?
Thank you and excuse me my bad english.

-- 
Best regards,
Brilliantov Kirill Vladimirovich
…………………………………………………………………
programmer, technical department
Byterg LLC
…………………………………………………………………
+7(495)221-66-22
http://www.byterg.ru    http://www.bestdvr.ru