GdkPixbuf* ghb_get_preview_image(
gint titleindex, gint index, signal_user_data_t *ud,
gint *width, gint *height);
-gint ghb_calculate_target_bitrate(GValue *settings, gint titleindex);
gchar* ghb_dvd_volname(const gchar *device);
gint ghb_get_title_number(gint titleindex);
gint ghb_subtitle_track_source(signal_user_data_t *ud, gint track);