A gstreamermm init example.
#include <gstreamermm.h>
#include <glibmm/optioncontext.h>
class MainOptionGroup : public Glib::OptionGroup
{
public:
  MainOptionGroup();
};
MainOptionGroup::MainOptionGroup()
: Glib::OptionGroup("main_group", "main group"),
{
  Glib::OptionEntry entry1;
  entry1.set_long_name("version");
  entry1.set_short_name('v');
  entry1.set_description("Show gstreamer version");
}
static void print_gstreamer_version()
{
  guint major, minor, micro, nano;
  
  switch (nano) {
    case 1: nano_str = "(CSV)"; break;
    case 2: nano_str = "(Prerelease)"; break;
  }
  std::cout << 
"This program is linked against GStreamer "       << major << "." << minor << "." << micro << "."
}
int main (int argc, char *argv[])
{
  
  Glib::OptionContext context("- gstreamermm init example");
  MainOptionGroup main_group;
  context.set_main_group(main_group);
  
  context.add_group(gst_group);
  try
  {
    context.parse(argc, argv);
  }
  catch (const Glib::Error& ex)
  {
    std::cerr << 
"Failed to initialize: " << ex.what() << 
std::endl;
     return 1;
  }
  if (main_group.version)
  {
    print_gstreamer_version();
  }
  std::cout << 
"Run me with --help to see the Application options appended." << 
std::endl;
  return 0;
}