4.2. The GOption interface

You can also use a GOption table to initialize your own parameters as shown in the next example:

Example 4-2. Initialisation using the GOption interface

#include <gst/gst.h>

main (int   argc,
      char *argv[])
  gboolean silent = FALSE;
  gchar *savefile = NULL;
  GOptionContext *ctx;
  GError *err = NULL;
  GOptionEntry entries[] = {
    { "silent", 's', 0, G_OPTION_ARG_NONE, &silent,
      "do not output status information", NULL },
    { "output", 'o', 0, G_OPTION_ARG_STRING, &savefile,
      "save xml representation of pipeline to FILE and exit", "FILE" },
    { NULL }

  ctx = g_option_context_new ("- Your application");
  g_option_context_add_main_entries (ctx, entries, NULL);
  g_option_context_add_group (ctx, gst_init_get_option_group ());
  if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
    g_print ("Failed to initialize: %s\n", err->message);
    g_error_free (err);
    return 1;

  printf ("Run me with --help to see the Application options appended.\n");

  return 0;


As shown in this fragment, you can use a GOption table to define your application-specific command line options, and pass this table to the GLib initialization function along with the option group returned from the function gst_init_get_option_group. Your application options will be parsed in addition to the standard GStreamer options.