======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '196'
                                          'artist'  'Sólstafir'
                                     'text_people'  ''
                                         'release'  'Masterpiece of Bitterness'
                                           'title'  'Náttfari'
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-4', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  ("['icelandic', 'post black metal', 'black metal', 'progressive metal', "
 "'rock', 'post metal']")
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  '7'
                                            'date'  '2005'
                                        'comments'  ''
                                           'genre'  'eid-metal-progressive'
                                             'bpm'  '102'
                                             'key'  '4B'
                                        'acoustid'  '95b7b659-6a6b-4289-b5f3-5ee30c725526'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'MCDI' (Music CD identifier)                        MCDI(data=b'7\x00+\x009\x006\x00+\x001\x005\x00F\x00C\x00D\x00+\x002\x000\x005\x00B\x004\x00+\x002\x006\x004\x000\x002\x00+\x003\x000\x001\x00C\x00F\x00+\x003\x009\x00C\x004\x00E\x00+\x004\x009\x00C\x000\x004\x00+\x004\x00D\x005\x00A\x00C\x00\x00\x00')
'PRIV:AverageLevel:\x82\x17\x00\x00'                PRIV(owner='AverageLevel', data=b'\x82\x17\x00\x00')
'PRIV:PeakValue:){\x00\x00'                         PRIV(owner='PeakValue', data=b'){\x00\x00')
'PRIV:WM/MediaClassPrimaryID:¼}`Ñ#ãâK\x86¡H¤*(D\x1e'  PRIV(owner='WM/MediaClassPrimaryID', data=b'\xbc}`\xd1#\xe3\xe2K\x86\xa1H\xa4*(D\x1e')
'PRIV:WM/MediaClassSecondaryID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/MediaClassSecondaryID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'PRIV:WM/Provider:U\x00s\x00e\x00r\x00 \x00F\x00e\x00e\x00d\x00b\x00a\x00c\x00k\x00\x00\x00'  PRIV(owner='WM/Provider', data=b'U\x00s\x00e\x00r\x00 \x00F\x00e\x00e\x00d\x00b\x00a\x00c\x00k\x00\x00\x00')
'PRIV:WM/UniqueFileIdentifier:;\x00\x00\x00'        PRIV(owner='WM/UniqueFileIdentifier', data=b';\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/WMCollectionGroupID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'PRIV:WM/WMCollectionID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/WMCollectionID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'PRIV:WM/WMContentID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/WMContentID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'TALB' (Album/Movie/Show title)                     'Masterpiece of Bitterness'
'TBPM' (BPM (beats per minute))                     '102'
'TCON' (Content type, a.k.a. Genre)                 'eid-metal-progressive'
'TDOR' (Original release time)                      '2005'
'TDRC' (Recording time)                             '2005-12-30'
'TIPL' (Involved people list)                       TIPL(encoding=<Encoding.UTF16: 1>, people=[['engineer', 'Sigurgrímur Jónsson'], ['mix', 'Sólstafir'], ['mix', 'Sigurgrímur Jónsson'], ['producer', 'Aðalbjörn Tryggvason'], ['producer', 'Sigurgrímur Jónsson'], ['guitar', 'Aðalbjörn Tryggvason'], ['guitar', 'Sæþór Maríus Sæþórsson'], ['bass', 'Svavar Austmann'], ['vocals', 'Aðalbjörn Tryggvason'], ['drums (drum set)', 'Guðmundur Óli Pálmason']])
'TIT2' (Title/songname/content description)         'Náttfari'
'TKEY' (Initial key)                                '4B'
'TLEN' (Length)                                     '196786'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Sólstafir'
'TPE2' (Band/orchestra/accompaniment)               'Sólstafir'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Spikefarm Records'
'TRCK' (Track number/Position in set)               '7/7'
'TSO2'                                              'Sólstafir'
'TSOP' (Performer sort order)                       'Sólstafir'
'TSRC' (ISRC (international standard recording code))  'FISFS0500295'
'TXXX:ASIN'                                         'B000BTJCXQ'
'TXXX:Acoustid Id'                                  '95b7b659-6a6b-4289-b5f3-5ee30c725526'
'TXXX:Artists'                                      'Sólstafir'
'TXXX:BARCODE'                                      '0602498742723'
'TXXX:CATALOGNUMBER'                                'Naula 072'
'TXXX:MusicBrainz Album Artist Id'                  '5f976464-4a48-4c0e-aee4-bb70afaf7a8b'
'TXXX:MusicBrainz Album Id'                         'b8d96b2f-d3a0-453c-a1b8-62d87799cc08'
'TXXX:MusicBrainz Album Release Country'            'FI'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '5f976464-4a48-4c0e-aee4-bb70afaf7a8b'
'TXXX:MusicBrainz Release Group Id'                 '5a163eab-02a3-3f7d-a88d-adea1dfe7f19'
'TXXX:MusicBrainz Release Track Id'                 '80b27715-5a55-3639-8a8b-30c12fa528bf'
'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'
'TXXX:lastfmtags'                                   ['icelandic',
 'post black metal',
 'black metal',
 'progressive metal',
 'rock',
 'post metal']
'TXXX:originalyear'                                 '2005'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.26 dB'
'TXXX:replaygain_track_peak'                        '0.487210'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'68a5afc2-21f7-417c-8a45-107bdc0a4eb5')

========================== row from database ==========================
                                              'id'  1399354
                                            'path'  /data/Music/Bulk/00dwimp/00metal/Sólstafir/Sólstafir - Masterpiece Of Bitterness/07-Náttfari.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  196
                                           'genre'  eid-metal-progressive
                                        'filesize'  7939294
                                           'mtime'  1620310890
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00metal Of 07 eid metal progressive
                                      'tag_artist'  Sólstafir
                                     'tag_release'  Masterpiece of Bitterness
                                       'tag_title'  Náttfari
                                             'bpm'  102.0
                                    'search_title'  'nattfari':1,2
                                   'search_artist'  'solstafir':1,2
                                  'search_release'  'bitterness':3 'masterpiece':1 'of':2
                                     'search_rest'  '00dwimp':1 '00metal':2 'eid':4 'metal':5 'of':3 'progressive':6
                                    'search_combo'  '00dwimp':8 '00metal':9 'bitterness':7C 'eid':11 'masterpiece':5C 'metal':12 'nattfari':1A,2A 'of':6C,10 'progressive':13 'solstafir':3B,4B
                                    'tag_tracknum'  7
                                      'num_images'  1
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-4', 'Q-HAP-1', 'q-bass-1', 'q-grit-4']
                                      'lastfmtags'  ['icelandic', 'post black metal', 'black metal', 'progressive metal', 'rock', 'post metal']
                                        'tag_date'  2005
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620310890.168355  (2021-05-06 16:21:30)
                             'size'  7939294