gint ghb_select_audio_codec(signal_user_data_t *ud, gint track);
const gchar* ghb_select_audio_codec_str(signal_user_data_t *ud, gint track);
gint ghb_find_closest_audio_bitrate(gint codec, gint rate);
gint ghb_select_audio_codec(signal_user_data_t *ud, gint track);
const gchar* ghb_select_audio_codec_str(signal_user_data_t *ud, gint track);
gint ghb_find_closest_audio_bitrate(gint codec, gint rate);