GST_STATE_CHANGE_FAILURE when I set the pipeline to playing state

[Dudi.r]

Hi fellows,

I have this pipeline:



#include <gst/app/gstappsrc.h>
#include <gst/app/gstappsink.h>





static GstFlowReturn new_sample(GstElement *sink, gpointer *data)
{
	g_print("new sample\n");
	GstSample *sample = gst_app_sink_pull_sample(GST_APP_SINK(sink));
	if (sample != NULL)
	{
		GstBuffer *buffer = gst_sample_get_buffer(sample);
	}

	return GST_FLOW_OK;
}


main()
{
    GstAppSrc *src;
    GstAppSink *sink;


    src = (GstAppSrc*)gst_element_factory_make("appsrc", "src");
    rtpdepay=gst_element_factory_make("rtph264depay", "rtpdepay");
    sink = (GstAppSink*)gst_element_factory_make("appsink", "sink");


    gst_bin_add_many(GST_BIN(pipeline), (GstElement*)src, rtpdepay,
(GstElement*)sink  , NULL);
 
     if(!gst_element_link_many((GstElement*)src, rtpdepay,
(GstElement*)sink)){
           g_warning("failed to link");
        }


     g_signal_connect(src, "need-data", G_CALLBACK(start_feed), NULL);
     g_signal_connect(src, "enough-data", G_CALLBACK(stop_feed), NULL);

    gst_app_sink_set_emit_signals(sink,TRUE);
    g_signal_connect(sink, "new-sample", G_CALLBACK(new_sample), NULL);


    ret= gst_element_set_state (pipeline, GST_STATE_PLAYING);   

}



I don't know why, but I the "ret" is- GST_STATE_CHANGE_FAILURE.
the link_many part is o.k... 

I can't figure it out what is wrong with the code...

thanks,
Dudi.



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