Upgraded gstreamer 0.1 to 1.0 pipeline stopped to work!

[atelyshev]

Hello, 
probably anybody can point me to the problem. I am reading from ip-camara,
make some framerate and size corrections and pass it to my own code.
Gstreamer 0.1 was fine, but I wanted to upgrade code base and currently in
troubles. Here the code:


GstElement* IpCameraPipeline::CreateSource()
{
	GstElement* source = gst_element_factory_make("uridecodebin", "source");
	//g_object_set (pipelineBase->_uriDecodeBin, "uri",
"http://193.201.74.114:80/mjpg/video.mjpg", NULL);
	g_object_set(G_OBJECT(source), "uri", _uri.c_str(), nullptr);
	//Connect to the pad-added signal of the uridecodebin element
	g_signal_connect(source, "pad-added", G_CALLBACK(PadAddedHandler), this);
	//Connect to the source-setup signal of the uridecodebin element
	g_signal_connect(source, "source-setup", G_CALLBACK(SourceSetupHandler),
this);
	g_signal_connect(source, "drained", G_CALLBACK(DrainedHandler), this);
	return source;
}

*Then build pipeline
*

	GSPipelineBase *pipelineBase = (GSPipelineBase*)data;
	pipelineBase->_sourceElement = pipelineBase->CreateSource();
	pipelineBase->_videoScale = gst_element_factory_make("videoscale",
"videoscale");
	pipelineBase->_videoRate = gst_element_factory_make("videorate",
"videorate");
	pipelineBase->_videoScaleCapsFilter =
gst_element_factory_make("capsfilter", "videoscalecapsfilter");
	pipelineBase->_videoRateCapsFilter = gst_element_factory_make("capsfilter",
"videoratecapsfilter");
	pipelineBase->_videoConverter = gst_element_factory_make("videoconvert",
"videoconverter");
	pipelineBase->_appSinkQueue = gst_element_factory_make("queue",
"appsinkqueue");
	pipelineBase->_appSink = gst_element_factory_make("appsink", "sink");

	gst_bin_add_many(GST_BIN(pipelineBase->_pipeline),
		pipelineBase->_sourceElement, 
		pipelineBase->_videoRate, 
		pipelineBase->_videoRateCapsFilter,
		pipelineBase->_videoScale, 
		pipelineBase->_videoScaleCapsFilter, 
		pipelineBase->_videoConverter,
		pipelineBase->_appSinkQueue, 
		pipelineBase->_appSink, 
		nullptr);

	if (!pipelineBase->LinkElements()) 
	{
		LOG_ERROR("GSPipelineBase error: Unable to link all elements");
		return false;
	}

	//Sets relevant properties for the elements in the pipeline

	//Set the caps filter to DCIF size. This will force the videoscale element
to scale the video to DCIF size.
	rawVideoScaleCaps = gst_caps_new_simple("video/x-raw", 
		"format", G_TYPE_STRING, "YUY2", 
		"width", G_TYPE_INT, GSPipelineBase::FRAME_WIDTH, 
		"height", G_TYPE_INT, GSPipelineBase::FRAME_HEIGHT, nullptr);
	g_object_set(pipelineBase->_videoScaleCapsFilter, "caps",
rawVideoScaleCaps, nullptr);
	gst_caps_unref(rawVideoScaleCaps);

	rawVideoRateCaps = gst_caps_new_simple("video/x-raw", 
		"format", G_TYPE_STRING, "YUY2",
		"framerate", GST_TYPE_FRACTION, GSPipelineBase::FRAMERATE_NUMERATOR,
GSPipelineBase::FRAMERATE_DENOMINATOR, nullptr);
	g_object_set(pipelineBase->_videoRateCapsFilter, "caps", rawVideoRateCaps,
nullptr);
	gst_caps_unref(rawVideoRateCaps);

	//Configure the appsink element
	appSinkCaps = gst_caps_from_string("video/x-raw");
	g_object_set(pipelineBase->_appSink, "emit-signals", TRUE, "caps",
appSinkCaps, nullptr);
	//g_object_set(pipelineBase->_appSink, "emit-signals", TRUE, NULL);	
	gst_caps_unref(appSinkCaps);

	//Connect to the new-buffer signal so we can retrieve samples without
blocking
	g_signal_connect(pipelineBase->_appSink, "new-sample",
G_CALLBACK(pipelineBase->NewSampleHandler), pipelineBase);

	if (!GSPipelineBase::ChangeElementState(pipelineBase->_pipeline,
GST_STATE_PLAYING)) 
	{
		LOG_ERROR("GSPipelineBase: Unable to set the pipeline to the playing
state.");
		return false;
	}

	bus = gst_pipeline_get_bus(GST_PIPELINE(pipelineBase->_pipeline));
	pipelineBase->_busWatchId = gst_bus_add_watch(bus, BusWatchHandler,
pipelineBase);
	gst_object_unref(bus);	

	GST_DEBUG_BIN_TO_DOT_FILE(GST_BIN(pipelineBase->_pipeline),
GST_DEBUG_GRAPH_SHOW_ALL, "graph.dot");
	return false;
}




gboolean GSPipelineBase::LinkElements()
{
	if (!gst_element_link_many(
		_videoRate, 
		_videoRateCapsFilter, 
		_videoScale, 
		_videoScaleCapsFilter, 
		_videoConverter, 
		_appSinkQueue, 
		_appSink, 
		nullptr))
	{
		return false;
	}
	return true;
}

// And finally link all
gboolean IpCameraPipeline::LinkElements()
{
	if (!GSPipelineBase::LinkElements())
	{
		return false;
	}
	if (!gst_element_link_many(_sourceElement, _videoRate, nullptr))
	{
		return false;
	}
	return true;
}

function 
gboolean IpCameraPipeline::LinkElements()
returns false, pipeline cant be created. 

Then I removed this part
	if (!gst_element_link_many(_sourceElement, _videoRate, nullptr))
	{
		return false;
	}
I did it for web camera and it worked, but it also didnt help. 
What is going on, why I cant complete pipeline anymore ?
Thanks



--
Sent from: http://gstreamer-devel.966125.n4.nabble.com/