stream receiver in C

[xname]

Hello there,
My stream receiver is now working;
under request, I will share it here:
(forgive my bad practice to paste code in the mailing list)

=== hellostream.c ====

/* video stream player - xname 2012
compile it with:
gcc -Wall hellostream.c -o hellostream $(pkg-config --cflags --libs
gstreamer-0.10) */

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


static gboolean
bus_call (GstBus     *bus,
          GstMessage *msg,
          gpointer    data)
{
  GMainLoop *loop = (GMainLoop *) data;

  switch (GST_MESSAGE_TYPE (msg)) {

    case GST_MESSAGE_EOS:
      g_print ("End of stream\n");
      g_main_loop_quit (loop);
      break;

    case GST_MESSAGE_ERROR: {
      gchar  *debug;
      GError *error;

      gst_message_parse_error (msg, &error, &debug);
      g_free (debug);

      g_printerr ("Error: %s\n", error->message);
      g_error_free (error);

      g_main_loop_quit (loop);
      break;
    }
    default:
      break;
  }

  return TRUE;
}

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

  GstElement *pipeline, *source, *rtph264, *decoder, *sink;
  GstCaps* caps;
  GstBus *bus;

  /* Initialisation */
  gst_init (&argc, &argv);

  loop = g_main_loop_new (NULL, FALSE);

  /* Check input arguments */
  if (argc != 1) {
    g_printerr ("Usage: no need to declare a file, just make sure you are
emitting on the right IP");
    return -1;
  }

  /* Create gstreamer elements */
  pipeline = gst_pipeline_new ("videostream-receiver");
  source   = gst_element_factory_make ("udpsrc",       "stream-source");
  rtph264 = gst_element_factory_make ("rtph264depay", "rtpdepay");
  decoder = gst_element_factory_make ("ffdec_h264", "ffdec");
  sink     = gst_element_factory_make ("autovideosink", "video-output");
  /* for mac use:
  sink     = gst_element_factory_make ("glimagesink", "video-output"); */

  if (!pipeline || !source || !rtph264 || !decoder || !sink) {
    g_printerr ("One element could not be created. Exiting.\n");
    return -1;
  }

   /* Specify the RTP stream that we expect */
   caps = gst_caps_new_simple( "application/x-rtp",
                   "clock-rate", G_TYPE_INT, 90000,
                   "encoding-name", G_TYPE_STRING, "H264",
                   NULL);
    g_object_set( source, "caps", caps, NULL );
    gst_caps_unref( caps );

   /* On what port are you listening? */
   g_object_set (G_OBJECT(source), "port", 4000, NULL);

  /* Add a message handler */
  bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
  gst_bus_add_watch (bus, bus_call, loop);
  gst_object_unref (bus);

  /* Add all elements into the pipeline */
  gst_bin_add_many (GST_BIN (pipeline),
                    source, rtph264, decoder,sink, NULL);

  /* We link the elements together */
  gst_element_link_many (source, rtph264, decoder, sink, NULL);

  /* Set the pipeline to "playing" state */
  g_print ("Receiving stream...\n");
  gst_element_set_state (pipeline, GST_STATE_PLAYING);

  /* Iterate */
  g_print ("Running...\n");
  g_main_loop_run (loop);

  /* Out of the main loop, clean up nicely */
  g_print ("Returned, stopping playback\n");
  gst_element_set_state (pipeline, GST_STATE_NULL);

  g_print ("Deleting pipeline\n");
  gst_object_unref (GST_OBJECT (pipeline));

  return 0;
}