======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '336'
                                          'artist'  'Megadeth'
                                     'text_people'  ''
                                         'release'  'The Originals'
                                           'title'  'Rust in Peace... Polaris'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-3', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['thrash', 'speed metal', 'thrash metal', 'metal', 'heavy metal']"
                                     'discogstags'  "['rock', 'thrash']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  '9'
                                            'date'  '1997'
                                        'comments'  ''
                                           'genre'  'eid-metal-trash'
                                             'bpm'  '84.5'
                                             'key'  '4A'
                                        'acoustid'  'aaee88f8-2c19-409b-ac2b-7818de5dc06b'
rest: ''

======================== rawer (from filesystem) ========================

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'The Originals'
'TBPM' (BPM (beats per minute))                     '84.5'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-trash'
'TDOR' (Original release time)                      '1997'
'TDRC' (Recording time)                             '1997'
'TIT2' (Title/songname/content description)         'Rust in Peace... Polaris'
'TKEY' (Initial key)                                '4A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Megadeth'
'TPE2' (Band/orchestra/accompaniment)               'Megadeth'
'TPOS' (Part of a set)                              '3/3'
'TPUB' (Publisher)                                  'Capitol Records'
'TRCK' (Track number/Position in set)               '9/9'
'TSO2'                                              'Megadeth'
'TSOP' (Performer sort order)                       'Megadeth'
'TSRC' (ISRC (international standard recording code))  'USCA29000012'
'TSST' (Set subtitle)                               'Rust in Peace'
'TXXX:Acoustid Id'                                  'aaee88f8-2c19-409b-ac2b-7818de5dc06b'
'TXXX:Artists'                                      'Megadeth'
'TXXX:BARCODE'                                      '724385596827'
'TXXX:CATALOGNUMBER'                                '7243 8 55968 2 7'
'TXXX:MusicBrainz Album Artist Id'                  'a9044915-8be3-4c7e-b11f-9e2d2ea0a91e'
'TXXX:MusicBrainz Album Id'                         '1975d17d-2116-4e35-bf01-d68520df679e'
'TXXX:MusicBrainz Album Release Country'            'XE'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album/compilation'
'TXXX:MusicBrainz Artist Id'                        'a9044915-8be3-4c7e-b11f-9e2d2ea0a91e'
'TXXX:MusicBrainz Release Group Id'                 'acd4bedd-19b1-4930-9149-fa2f848ecc7d'
'TXXX:MusicBrainz Release Track Id'                 'd0e585e3-0e1c-4203-b6d7-f1be4532894e'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  ['rock', 'thrash']
'TXXX:lastfmtags'                                   ['thrash', 'speed metal', 'thrash metal', 'metal', 'heavy metal']
'TXXX:originalyear'                                 '1997'
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.16 dB'
'TXXX:replaygain_track_peak'                        '0.738878'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'205560ca-f50e-46bb-ab8c-d9758554968e')

========================== row from database ==========================
                                              'id'  1397296
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Megadeth/_Onbekend_/Megadeth - Rust In Peace.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  336
                                           'genre'  eid-metal-trash
                                        'filesize'  5451223
                                           'mtime'  1620311617
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal _Onbekend_ In eid metal trash
                                      'tag_artist'  Megadeth
                                     'tag_release'  The Originals
                                       'tag_title'  Rust in Peace... Polaris
                                             'bpm'  84.5
                                    'search_title'  'in':2 'peace':3,4 'polaris':5 'rust':1
                                   'search_artist'  'megadeth':1
                                  'search_release'  'originals':2 'the':1
                                     'search_rest'  '00dwimp':1 '00metal':2 'eid':5 'in':4 'metal':6 'onbekend':3 'trash':7
                                    'search_combo'  '00dwimp':9 '00metal':10 'eid':13 'in':2A,12 'megadeth':6B 'metal':14 'onbekend':11 'originals':8C 'peace':3A,4A 'polaris':5A 'rust':1A 'the':7C 'trash':15
                                    'tag_tracknum'  9
                                      'num_images'  1
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-1', 'q-bass-2', 'q-grit-3']
                                      'lastfmtags'  ['thrash', 'speed metal', 'thrash metal', 'metal', 'heavy metal']
                                        'tag_date'  1997
                                     'discogstags'  ['rock', 'thrash']

============================== file details ==============================
                                           'mtime'  1620311617.2765222  (2021-05-06 16:33:37)
                             'size'  5451223