void ghb_set_audio(signal_user_data_t *ud, GValue *settings);
gchar* ghb_get_user_audio_lang(
signal_user_data_t *ud, gint titleindex, gint track);
void ghb_set_audio(signal_user_data_t *ud, GValue *settings);
gchar* ghb_get_user_audio_lang(
signal_user_data_t *ud, gint titleindex, gint track);