Several breaking changes were made in version 2 to allow the project to follow modern php standards.
The most significant of these was renaming all classes to allow for autoloading.
All classes are now within the namespace JamesHeinrich\GetID3 and their old and new names are shown below:
Old name in root namespace New name in JamesHeinrich\GetID3
getID3 GetID3
getid3_lib Utils
getid3_writetags Writer
getID3_cached_dbm Cache\Dbm
getID3_cached_mysql Cache\Mysql
getID3_cached_mysqli Cache\Mysqli
getID3_cached_sqlite3 Cache\Sqlite3
getid3_gzip Module\Archive\Gzip
getid3_rar Module\Archive\Rar
getid3_szip Module\Archive\Szip
getid3_tar Module\Archive\Tar
getid3_zip Module\Archive\Zip
getid3_zip Module\Archive\Zip
getid3_aac Module\Audio\Aac
getid3_aa Module\Audio\Aa
getid3_ac3 Module\Audio\Ac3
getid3_amr Module\Audio\Amr
getid3_au Module\Audio\Au
getid3_avr Module\Audio\Avr
getid3_bonk Module\Audio\Bonk
getid3_dss Module\Audio\Dss
getid3_dts Module\Audio\Dts
getid3_flac Module\Audio\Flac
getid3_la Module\Audio\La
getid3_lpac Module\Audio\Lpac
getid3_midi Module\Audio\Midi
getid3_mod Module\Audio\Mod
getid3_monkey Module\Audio\Monkey
getid3_mp3 Module\Audio\Mp3
getid3_mpc Module\Audio\Mpc
getid3_ogg Module\Audio\Ogg
getid3_optimfrog Module\Audio\OptimFrog
getid3_rkau Module\Audio\Rkau
getid3_shorten Module\Audio\Shorten
getid3_tta Module\Audio\Tta
getid3_voc Module\Audio\Voc
getid3_vqf Module\Audio\Vqf
getid3_wavpack Module\Audio\WavPack
getid3_asf Module\AudioVideo\Asf
getid3_bink Module\AudioVideo\Bink
getid3_flv Module\AudioVideo\Flv
getid3_matroska Module\AudioVideo\Matroska
getid3_mpeg Module\AudioVideo\Mpeg
getid3_nsv Module\AudioVideo\Nsv
getid3_quicktime Module\AudioVideo\QuickTime
getid3_real Module\AudioVideo\Real
getid3_riff Module\AudioVideo\Riff
getid3_swf Module\AudioVideo\Swf
getid3_ts Module\AudioVideo\Ts
getid3_bmp Module\Graphic\Bmp
getid3_efax Module\Graphic\Efax
getid3_gif Module\Graphic\Gif
getid3_jpg Module\Graphic\Jpg
getid3_pcd Module\Graphic\Pcd
getid3_png Module\Graphic\Png
getid3_svg Module\Graphic\Svg
getid3_tiff Module\Graphic\Tiff
getid3_cue Module\Misc\Cue
getid3_exe Module\Misc\Exe
getid3_iso Module\Misc\Iso
getid3_msoffice Module\Misc\MsOffice
getid3_par2 Module\Misc\Par2
getid3_pdf Module\Misc\Pdf
getid3_torrent Module\Misc\Torrent
getid3_apetag Module\Tag\ApeTag
getid3_id3v1 Module\Tag\ID3v1
getid3_id3v2 Module\Tag\ID3v2
getid3_lyrics3 Module\Tag\Lyrics3
Image_XMP Module\Tag\Xmp
getid3_write_apetag Write\ApeTag
getid3_write_id3v1 Write\ID3v1
getid3_write_id3v2 Write\ID3v2
getid3_write_lyrics3 Write\Lyrics3
getid3_write_metaflac Write\MetaFlac
getid3_write_real Write\Real
getid3_write_vorbiscomment Write\VorbisCommentOld constant New constant
GETID3_MIDI_MAGIC_MTHD JamesHeinrich\GetID3\Module\Audio\Midi::MAGIC_MTHD
GETID3_MIDI_MAGIC_MTRK JamesHeinrich\GetID3\Module\Audio\Midi::MAGIC_MTRK
GETID3_MP3_VALID_CHECK_FRAMES JamesHeinrich\GetID3\Module\Audio\Mp3::VALID_CHECK_FRAMES
GETID3_FLV_TAG_AUDIO JamesHeinrich\GetID3\Module\AudioVideo\Flv::TAG_AUDIO
GETID3_FLV_TAG_VIDEO JamesHeinrich\GetID3\Module\AudioVideo\Flv::TAG_VIDEO
GETID3_FLV_TAG_META JamesHeinrich\GetID3\Module\AudioVideo\Flv::TAG_META
GETID3_FLV_VIDEO_H263 JamesHeinrich\GetID3\Module\AudioVideo\Flv::VIDEO_H263
GETID3_FLV_VIDEO_SCREEN JamesHeinrich\GetID3\Module\AudioVideo\Flv::VIDEO_SCREEN
GETID3_FLV_VIDEO_VP6FLV JamesHeinrich\GetID3\Module\AudioVideo\Flv::VIDEO_VP6FLV
GETID3_FLV_VIDEO_VP6FLV_ALPHA JamesHeinrich\GetID3\Module\AudioVideo\Flv::VIDEO_VP6FLV_ALPHA
GETID3_FLV_VIDEO_SCREENV2 JamesHeinrich\GetID3\Module\AudioVideo\Flv::VIDEO_SCREENV2
GETID3_FLV_VIDEO_H264 JamesHeinrich\GetID3\Module\AudioVideo\Flv::VIDEO_H264
H264_AVC_SEQUENCE_HEADER JamesHeinrich\GetID3\Module\AudioVideo\Flv::H264_AVC_SEQUENCE_HEADER
H264_PROFILE_BASELINE JamesHeinrich\GetID3\Module\AudioVideo\Flv::H264_PROFILE_BASELINE
H264_PROFILE_MAIN JamesHeinrich\GetID3\Module\AudioVideo\Flv::H264_PROFILE_MAIN
H264_PROFILE_EXTENDED JamesHeinrich\GetID3\Module\AudioVideo\Flv::H264_PROFILE_EXTENDED
H264_PROFILE_HIGH JamesHeinrich\GetID3\Module\AudioVideo\Flv::H264_PROFILE_HIGH
H264_PROFILE_HIGH10 JamesHeinrich\GetID3\Module\AudioVideo\Flv::H264_PROFILE_HIGH10
H264_PROFILE_HIGH422 JamesHeinrich\GetID3\Module\AudioVideo\Flv::H264_PROFILE_HIGH422
H264_PROFILE_HIGH444 JamesHeinrich\GetID3\Module\AudioVideo\Flv::H264_PROFILE_HIGH444
H264_PROFILE_HIGH444_PREDICTIVE JamesHeinrich\GetID3\Module\AudioVideo\Flv::H264_PROFILE_HIGH444_PREDICTIVE
EBML_ID_* JamesHeinrich\GetID3\Module\AudioVideo\Matroska::ID_*Temp Directory
Previously the temp directory could be set by defining a global constant called GETID3_TEMP_DIR
This is now done by calling Utils::setTempDirectory()
# Old way
define("GET_ID3_TEMP_DIR", "/tmp/custom_getid3_stuff");
# New way
use JamesHeinrich\GetID3\Utils;
Utils::setTempDirectory("/tmp/custom_getid3_stuff");