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*Details: File format summary

    
 

 

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Go to:  Summary  |  Documentation  |  Signatures |  Compression  |  Character encoding  |  Rights  |  Reference files   Properties  
 

Signatures
External signatures File extension: mp3
Internal signatures
Name MPEG-1 Audio Layer 3 with ID3v2 Tag
Description Regularly-spaced frame headers should always be discoverable near EOF. An ID3v1 tag of up to 355 bytes may be present at EOF.
Byte sequences
Position type Absolute from EOF
Offset 0
Byte order Little-endian
Value FFFB[10:EB]{46-1439}FFFB[10:EB]{46-1439}FFFB[10:EB]{46-1439}FFFB[10:EB]{46-1439}FFFB[10:EB]{46-1439}FFFB[10:EB]{46-1439}FFFB[10:EB]{47-1795}
Position type Absolute from BOF
Offset 0
Byte order Little-endian
Value 494433
Name MPEG-2 Audio Layer 3 with ID3v2 Tag
Description Regularly-spaced frame headers should always be discoverable near EOF. An ID3v1 tag of up to 355 bytes may be present at EOF.
Byte sequences
Position type Absolute from EOF
Offset 0
Byte order Little-endian
Value FFF3[10:EB]{46-1439}FFF3[10:EB]{46-1439}FFF3[10:EB]{46-1439}FFF3[10:EB]{46-1439}FFF3[10:EB]{46-1439}FFF3[10:EB]{46-1439}FFF3[10:EB]{47-1795}
Position type Absolute from BOF
Offset 0
Byte order Little-endian
Value 494433
Name MPEG-1 Audio Layer 3 with ID3v2 Tag (protected)
Description Regularly-spaced frame headers should always be discoverable near EOF. Header has CRC bit off to indicate protected. An ID3v1 tag of up to 355 bytes may be present at EOF.
Byte sequences
Position type Absolute from EOF
Offset 0
Byte order Little-endian
Value FFFA[10:EB]{46-1439}FFFA[10:EB]{46-1439}FFFA[10:EB]{46-1439}FFFA[10:EB]{46-1439}FFFA[10:EB]{46-1439}FFFA[10:EB]{46-1439}FFFA[10:EB]{47-1795}
Position type Absolute from BOF
Offset 0
Byte order Little-endian
Value 494433
Name MPEG-2 Audio Layer 3 with ID3v2 Tag (protected)
Description Regularly-spaced frame headers should always be discoverable near EOF. Header has CRC bit off to indicate protected. An ID3v1 tag of up to 355 bytes may be present at EOF.
Byte sequences
Position type Absolute from EOF
Offset 0
Byte order Little-endian
Value FFF2[10:EB]{46-1439}FFF2[10:EB]{46-1439}FFF2[10:EB]{46-1439}FFF2[10:EB]{46-1439}FFF2[10:EB]{46-1439}FFF2[10:EB]{46-1439}FFF2[10:EB]{47-1795}
Position type Absolute from BOF
Offset 0
Byte order Little-endian
Value 494433
Name MPEG-1 Audio Layer 3 without ID3v2 Tag
Description Regularly-spaced frame headers should always be discoverable starting at BOF.
Byte sequences
Position type Absolute from BOF
Offset 0
Maximum Offset 1795
Byte order Little-endian
Value FFFB[10:EB]{46-1439}FFFB[10:EB]{46-1439}FFFB[10:EB]{46-1439}FFFB[10:EB]{46-1439}FFFB[10:EB]{46-1439}FFFB[10:EB]{46-1439}FFFB[10:EB]{46-1439}FFFB[10:EB]{46-1439}FFFB[10:EB]{46-1439}FFFB[10:EB]
Name MPEG-2 Audio Layer 3 without ID3v2 Tag
Description Regularly-spaced frame headers should always be discoverable starting at BOF.
Byte sequences
Position type Absolute from BOF
Offset 0
Maximum Offset 1795
Byte order Little-endian
Value FFF3[10:EB]{46-1439}FFF3[10:EB]{46-1439}FFF3[10:EB]{46-1439}FFF3[10:EB]{46-1439}FFF3[10:EB]{46-1439}FFF3[10:EB]{46-1439}FFF3[10:EB]{46-1439}FFF3[10:EB]{46-1439}FFF3[10:EB]{46-1439}FFF3[10:EB]
Name MPEG-1 Audio Layer 3 without ID3v2 Tag (protected)
Description Regularly-spaced frame headers should always be discoverable starting at BOF with each header having CRC bit set off to indicate file is protected.
Byte sequences
Position type Absolute from BOF
Offset 0
Maximum Offset 1795
Byte order Little-endian
Value FFFA[10:EB]{46-1439}FFFA[10:EB]{46-1439}FFFA[10:EB]{46-1439}FFFA[10:EB]{46-1439}FFFA[10:EB]{46-1439}FFFA[10:EB]{46-1439}FFFA[10:EB]{46-1439}FFFA[10:EB]{46-1439}FFFA[10:EB]{46-1439}FFFA[10:EB]
Name MPEG-2 Audio Layer 3 without ID3v2 Tag (protected)
Description Regularly-spaced frame headers should always be discoverable starting at BOF with each header having CRC bit set off to indicate file is protected.
Byte sequences
Position type Absolute from BOF
Offset 0
Maximum Offset 1795
Byte order Little-endian
Value FFF2[10:EB]{46-1439}FFF2[10:EB]{46-1439}FFF2[10:EB]{46-1439}FFF2[10:EB]{46-1439}FFF2[10:EB]{46-1439}FFF2[10:EB]{46-1439}FFF2[10:EB]{46-1439}FFF2[10:EB]{46-1439}FFF2[10:EB]{46-1439}FFF2[10:EB]
Name MP3 2.5
Description Regularly-spaced frame headers should always be discoverable starting at BOF. MPEG 2.5 is an extended variant of MP3 that provides wider support of lower bit-rates than standard MP3. It is implemented by LAME encoder among others, however is not an officially recognised standard.
Byte sequences
Position type Absolute from BOF
Offset 0
Maximum Offset 1795
Byte order  
Value FFE3[10:EB]{46-1439}FFE3[10:EB]{46-1439}FFE3[10:EB]{46-1439}FFE3[10:EB]{46-1439}FFE3[10:EB]{46-1439}FFE3[10:EB]{46-1439}FFE3[10:EB]{46-1439}FFE3[10:EB]{46-1439}FFE3[10:EB]{46-1439}FFE3[10:EB]
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