How to set properties in GStreamer elements

[arpi d]

How to set the element's properties in C using g_object_set():

I would like to set the properties of x264enc element as
x264enc tune=zerolatency byte-stream=true bitrate=300

I have used this code I am getting the warning:
g_object_set (videoenc,
"tune","zerolatency","byte-stream",TRUE,"bitrate",300,NULL);

GLib-GObject-WARNING **: value "((GstX264EncTune) Zero latency (requires
constant framerate) | 134519424)" of type `GstX264EncTune' is invalid or out
of range for property `tune' of type `GstX264EncTune

  I would like to set the properties of  udpsink :

  I have used this code and getting warning:

  rtpsink = gst_element_factory_make ("udpsink", "rtpsink");
  g_assert (rtpsink);

  g_object_set (rtpsink, "port", 5000,"host", DEST_HOST, NULL);
  g_object_set(rtpsink,"ts-offset",VOFFSET,NULL);


  GLib-GObject-WARNING **: g_object_set_valist: object class `GstUDPSink'
has no property named `127.0.0.1'

  Please some one reply me what I need to change that all work fine.

  Thanks in advance.
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