My problem is, I cannot create Gstreamer element.
I am creating Gstreamer
project using Qt 5.2.1
What I am doing :
Try to make a different element and see if that works, e.g.:
gst_element_factory_make("fakesrc", NULL);
If that also fails then it is likely your environment is not set up correctly. You can try setting the environment variable GST_PLUGIN_PATH
to the directory containing your gstreamer plugins.