gst eos problem

gistfile1.cpp

#include <gst/gst.h>
#include <unistd.h>

int main(int argc, char *argv[]) {

	GstElement *pipeline, *source, *capsfilter, *h264parse, *mux, *sink, *encoder;
	GstBus *bus;
	GstMessage *msg;
	GstPad *blockpad;

	gst_init (NULL,NULL);

	source = gst_element_factory_make("videotestsrc","source");
	capsfilter = gst_element_factory_make("capsfilter","caps");
	h264parse = gst_element_factory_make("h264parse","h264parse");
	mux = gst_element_factory_make("mp4mux","mux");
	sink = gst_element_factory_make("filesink","sink");
	encoder = gst_element_factory_make("x264enc","encoder");

	//g_object_set(source, "bitrate", 6000000, NULL);
	//g_object_set(rtph264, "config-interval", 1, NULL);
	//g_object_set(rtph264, "pt", 96 , NULL);
	g_object_set(sink, "location" , "test.mp4",NULL);


	g_object_set(capsfilter, "caps", gst_caps_new_simple("video/x-raw",
		"width", G_TYPE_INT, 1280,
		"height", G_TYPE_INT, 720,
		"framerate", GST_TYPE_FRACTION, 30 , 1 ,NULL), NULL);

	pipeline = gst_pipeline_new("test-pipeline");

	gst_bin_add_many(GST_BIN(pipeline), source,capsfilter,encoder,h264parse,mux,sink,NULL);
	

	gst_element_link_many(source,capsfilter,encoder,sink,NULL);

	gst_element_set_state (pipeline, GST_STATE_PLAYING);
   
	sleep(5);
	
	gst_element_send_event(sink, gst_event_new_eos ());

	gst_element_set_state(GST_ELEMENT(pipeline), GST_STATE_NULL);

	gst_object_unref(GST_OBJECT(pipeline));

	return 0;

}