GstPipeline and bus call

[Yaroslav]

Hi all!

Now i need to play udp stream on my imx6 boards and show image(logo) when no
data on port.

Server: 

gst-launch-1.0 -v filesrc location=/video/0001.mp4 ! decodebin ! vpuenc_h264
bitrate=8192 ! rtph264pay ! udpsink host=192.168.5.255 port=5555

Client (C code):


#define GST_PLAYER_UDP "udpsrc port=5555 caps=\"application/x-rtp,
media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264,
payload=(int)96\"\
		! rtph264depay ! decodebin ! videoconvert ! autovideosink"
....

static gboolean bus_call (GstBus     *bus, GstMessage *msg, gpointer   
data)
{
	printf("msg=%s (from
%s)\n",gst_message_type_get_name(GST_MESSAGE_TYPE(msg)),
GST_MESSAGE_SRC_NAME(msg));

	return TRUE;
}
...
GstElement* gstLaunch()
{
	GstElement *pipeline;
	GError *error = NULL;

	pipeline = gst_parse_launch (GST_PLAYER_UDP, &error);
	if (!pipeline){
		g_print ("\tParse error: %s\n", error->message);
		return 0;
	}

	gst_element_set_state (pipeline, GST_STATE_PLAYING);

	GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
	guint watch_id = gst_bus_add_watch (bus, bus_call, NULL);
	gst_object_unref (bus);

	return pipeline;
}

-----------------------------------------------------------------------------------------------

When i start streaming all work fine and i can see when streamig start:

display(/dev/fb0) resolution is (1280x800).
====== OVERLAYSINK: 4.0.9 build on May 12 2017 10:36:47. ======
display(/dev/fb0) resolution is (1280x800).
display(/dev/fb0) resolution is (1280x800).
msg=state-changed (from autovideosink0)
msg=state-changed (from videoconvert0)
msg=state-changed (from typefind)
msg=state-changed (from decodebin0)
msg=state-changed (from rtph264depay0)
msg=state-changed (from udpsrc0)
msg=state-changed (from pipeline0)
msg=state-changed (from videoconvert0)
msg=state-changed (from typefind)
msg=state-changed (from rtph264depay0)
msg=stream-status (from src)
msg=state-changed (from udpsrc0)
msg=state-changed (from pipeline0)
msg=stream-status (from src)
msg=new-clock (from pipeline0)
msg=state-changed (from videoconvert0)
msg=state-changed (from rtph264depay0)
msg=state-changed (from udpsrc0)
msg=state-changed (from h264parse0)
msg=state-changed (from h264parse0)
[INFO]	Product Info: i.MX6Q/D/S
msg=state-changed (from vpudec0)
[INFO]	Product Info: i.MX6Q/D/S
====== VPUDEC: 4.0.9 build on May 12 2017 10:36:53. ======
	wrapper: 1.0.65 (VPUWRAPPER_ARM_LINUX Build on May 12 2017 10:30:05)
	vpulib: 5.4.33
	firmware: 3.1.1.46072
msg=state-changed (from vpudec0)
[INFO]	bitstreamMode 1, chromaInterleave 1, mapType 0, tiled2LinearEnable 0
msg=state-changed (from decodebin0)
msg=stream-start (from pipeline0)

msg=state-changed (from autovideosink0-actual-sink-overlay)
msg=state-changed (from autovideosink0)
msg=async-done (from pipeline0)
msg=state-changed (from autovideosink0-actual-sink-overlay)
msg=state-changed (from autovideosink0)
msg=state-changed (from vpudec0)
msg=state-changed (from capsfilter0)
msg=state-changed (from h264parse0)
msg=state-changed (from typefind)
msg=state-changed (from decodebin0)
msg=state-changed (from pipeline0)
msg=qos (from autovideosink0-actual-sink-overlay)
msg=tag (from autovideosink0-actual-sink-overlay)

but when file play all or server not available there is no message on bus
What should I do to understand that the video data is not received by the
client(and i need to show splashscreen)??

PS please, help! I spent a lot of time and start despair...




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