MP3's are a strange beast, many bits have been grafted on over the decades, the word 'standard' requires a big ⭐ next to it when talking about them.
To get a higher (and hopefully definitive) match I've added versioned main fingerprints and a lot of multi match data (seriously loads). This should match pretty much any MP3 you come across with 0.8 confidences (assuming correct extension), beating false .koz matches into the dirt. I left the non-versioned .mp3 match in and added a TAG multi match to allow for fringe cases.
The .json has grown somewhat in file size to accommodate these matches, technically we could strip some of the 4 letter matches from 2.3 if I could find which ones did not apply until 2.4, however, there is little data regarding exactly what the additional ones were. Also to ensure the best confidence I had to duplicate the 4 letter matches for both v2.3 and v2.4. Again, it would also be possible to maybe sacrifice some of the more obscure 3/4 letter matches, but as there is no set rule for the ordering of the frame headers there is the potential for fringe cases where a rarely used one comes first.
Main fingerprints:
0x4944330200 / ID3 = ID3v2.2.0, Rare
0x4944330300 / ID3 = ID3v2.3.0, Common
0x4944330400 / ID3 = ID3v2.4.0, Common
Multi-Part fingerprints:
0x544147 / TAG = v1.x tag marker at -128 bytes, if a file has tags it will have this. NOTE: It is possible for a v2 file to not have v1 tags but unlikely.
This is a weird one I found on a corner of a drive. It would have not matched as a .koz as it's a v2.2 but equally would have a low confidence match as it had no tags, using the additional 3 letter frame match you'll get a solid match. The output comes from my own confidence test script so I can easily see/test patterns.
congratulations.zip
Closes #32
MP3's are a strange beast, many bits have been grafted on over the decades, the word 'standard' requires a big ⭐ next to it when talking about them.
To get a higher (and hopefully definitive) match I've added versioned main fingerprints and a lot of multi match data (seriously loads). This should match pretty much any MP3 you come across with 0.8 confidences (assuming correct extension), beating false
.kozmatches into the dirt. I left the non-versioned.mp3match in and added aTAGmulti match to allow for fringe cases.The .json has grown somewhat in file size to accommodate these matches, technically we could strip some of the 4 letter matches from 2.3 if I could find which ones did not apply until 2.4, however, there is little data regarding exactly what the additional ones were. Also to ensure the best confidence I had to duplicate the 4 letter matches for both v2.3 and v2.4. Again, it would also be possible to maybe sacrifice some of the more obscure 3/4 letter matches, but as there is no set rule for the ordering of the frame headers there is the potential for fringe cases where a rarely used one comes first.
Main fingerprints:
0x4944330200/ID3= ID3v2.2.0, Rare0x4944330300/ID3= ID3v2.3.0, Common0x4944330400/ID3= ID3v2.4.0, CommonMulti-Part fingerprints:
0x544147/TAG= v1.x tag marker at -128 bytes, if a file has tags it will have this. NOTE: It is possible for a v2 file to not have v1 tags but unlikely.AENC, APIC, ASPI, COMM, COMR, ENCR, EQU2, ETCO, GEOB, GRID, LINK, MCDI, MLLT, OWNE, PRIV, PCNT, POPM, POSS, RBUF, RVA2, RVRB, SEEK, SIGN, SYLT, SYTC, TALB, TBPM, TCOM, TCON, TCOP, TDEN, TDLY, TDOR, TDRC, TDRL, TDTG, TENC, TEXT, TFLT, TIPL, TIT1, TIT2, TIT3, TKEY, TLAN, TLEN, TMCL, TMED, TMOO, TOAL , TOFN, TOLY, TOPE, TOWN, TPE1, TPE2, TPE3, TPE4, TPOS, TPRO, TPUB, TRCK, TRSN, TRSO, TSOA, TSOP, TSOT, TSRC, TSSE, TSST, TXXX, UFID, USER, USLT, WCOM, WCOP, WOAF, WOAR, WOAS, WORS, WPAY, WPUB, WXXX= 4 Letter Frame codes at byte 10 for 2.3/2.4 filesBUF, CNT, COM, CRA, CRM, ETC, EQU, GEO, IPL, LNK, MCI, MLL, PIC, POP, REV, RVA, SLT, STC, TAL, TBP, TCM, TCO, TCR, TDA, TDY, TEN, TFT, TIM, TKE, TLA, TLE, TMT, TOA, TOF, TOL, TOR, TOT, TP1, TP2, TP3, TP4, TPA, TPB, TRC, TRD, TRK, TSI, TSS, TT1, TT2, TT3, TXT, TXX, TYE, UFI, ULT, WAF, WAR, WAS, WCM, WCP, WPB, WXX= three letter codes used by v2.2 filesTest file:
This is a weird one I found on a corner of a drive. It would have not matched as a
.kozas it's a v2.2 but equally would have a low confidence match as it had no tags, using the additional 3 letter frame match you'll get a solid match. The output comes from my own confidence test script so I can easily see/test patterns. congratulations.zipExample matches:
Links: