Ok so i use the following snippet of code so that i can use the appsrc
element for media playback in playbin2.

m_playbin is a playbin2.


g_object_set(G_OBJECT(m_playbin), "uri", "appsrc://", NULL);
g_signal_connect(G_OBJECT(m_playbin), "deep-notify::source", (GCallback) &QGstreamerPlayerSession::appSrcElementReady, this);

//static class method
void QGstreamerPlayerSession::appSrcElementReady(GObject* object, GObject *orig,
                                           GParamSpec *pspec, QGstreamerPlayerSession* _this)
{
    if (_this == 0)
        return;
    // get handle to appsrc
    GstElement *appsrc = 0; 
    g_object_get(orig, "source", appsrc, NULL);
    if (appsrc == 0)
        qDebug()<<"appsrc is null ";

    if (!_this->appsrc()->configure(GST_APP_SRC(appsrc))) {
        qWarning()<<"could not configure appsrc element";
    }
}

The callback appSrcElementReady is invoked. But i get a NULL appsrc
element from the "source" property.

I get this warning too: (<unknown>:16850): GLib-GObject-WARNING **: IA__g_object_get_valist: value location for `GstElement' passed as NULL


Idea taken from:
http://gst-plugins-bad0.10.sourcearchive.com/documentation/0.10.9-1/appsrc-stream2_8c-source.html

Are there any work around's for this? Unfortunately I'm constrained to gstreamer-0.10.28 as the later versions are too unstable for us in general.