unable to play gstreamer in QWidget

[prkhr4u]

I am trying to use gstreamer to play video from a network camera in QWidget.
I am utilizing "mjpeg" stream of the camera.

I am able to successfully play the video in terminal using :

gst-launch souphttpsrc location=http://169.254.75.39/video2.mjpg timeout=5 ! jpegdec ! xvimagesink

The same code I am trying to play in QWidget using this code:

#include <glib.h>
#include <gst/gst.h>
#include <gst/interfaces/xoverlay.h>

#include <QApplication>
#include <QTimer>
#include <QWidget>

int main(int argc, char *argv[])
{
if (!g_thread_supported ())
g_thread_init (NULL);

gst_init (&argc, &argv);
QApplication app(argc, argv);
app.connect(&app, SIGNAL(lastWindowClosed()), &app, SLOT(quit ()));

// prepare the pipeline

GstElement *pipeline = gst_pipeline_new ("xvoverlay");
GstElement *src = gst_element_factory_make ("souphttpsrc",NULL);
GstElement *sink = gst_element_factory_make ("xvimagesink", NULL);
gst_bin_add_many (GST_BIN (pipeline), src, sink, NULL);
gst_element_link (src, sink);
g_object_set (src, "location", "http://169.254.75.39/video2.mjpg", NULL);
// prepare the ui

QWidget window;
window.move(0,0);
window.resize(320, 240);
window.show();

WId xwinid = window.winId();
gst_x_overlay_set_window_handle (GST_X_OVERLAY (sink), xwinid);

// run the pipeline

GstStateChangeReturn sret = gst_element_set_state (pipeline,
GST_STATE_PLAYING);
if (sret == GST_STATE_CHANGE_FAILURE) {
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (pipeline);
// Exit application
QTimer::singleShot(0, QApplication::activeWindow(), SLOT(quit()));
}

int ret = app.exec();

window.hide();
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (pipeline);

return ret;
}


When I run the code,all I am getting is a blank QWidget with nothing.

My gstreamer has been correctly setup in QT and I was able to play a sample pattern easily in QWidget.

I guess I am missing the decoder configuration in QT for 'jpegdec'
Can anyone tell how to correctly set it up?
Here is the .pro file content:

QT += core gui

TARGET = streaming
TEMPLATE = app


SOURCES += main.cpp\
mainwindow.cpp

HEADERS += mainwindow.h

FORMS += mainwindow.ui

CONFIG += link_pkgconfig
PKGCONFIG += gstreamer-0.10\
gstreamer-interfaces-0.10\
gtk+-2.0\

QMAKE_CXXFLAGS += -fpermissive

P.S. : using ubuntu 12.04

[apurv]

I am also looking for the answer. Have you got any solution?