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POidentify song information from mp3 id3v2 tags
 

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  1. POidentify song information from mp3 id3v2 tags
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    <p>i already have mp3 binary data, i just want to know how can i extract info from it. v1 is easy, take last 128 characters and you are done. but v2 has variable length. documentation says that tag size will be in header but i was unable to find it in any song i tested.</p> <p>but anyways i simply want to extract album and artist info.. jsut these two, with javascript. lets take for simplicity sake that i have first 2000 bytes of a Taylor swift song in a variable (below is the actual binary data of a song):</p> <pre><code>ID3!vTYER2010TIT2 Last KissMCDI¬E+96+4484+918B+E800+12F4B+1A636+1EC24+23A8E+2905F+2F7DD+33868+3914B+3D931+44555+4A27BTRCK13TCON(2)CountryPRIVPeakValue¡PRIVAverageLevel{ TPE2 Taylor SwiftPRIV)WM/MediaClassSecondaryIDPRIV'WM/MediaClassPrimaryID¼}`Ñ#ãâK¡H¤*(DPRIVWM/ProviderAMGPRIVWM/WMContentIDÇ1t&gt;êDëþëPRIV"WM/WMCollectionID ¨F}âH"Y#7 ÈPRIV'WM/WMCollectionGroupID ¨F}âH"Y#7 ÈTPUBBig MachinePRIVWM/UniqueFileIdentifierAMGa_id=R 2026672;AMGp_id=P 816977;AMGt_id=T 22057912TALB Speak NowTPE1 Taylor SwiftTLEN369120ÿûà@üK </code></pre> <p>now i can easily locate the album and artist name (last two lines). and i can also find where the data begins with js pretty easily. just locate <code>TALB</code> and <code>TPE1</code>. simple. but how in the world do i know where the data ends..? they may or may not be adjacent to each other in other songs. they may or may not be uppercase. how do all the other libraries figure out where the data ends?</p> <p>also there is no 'size' in the beginning as the documentation suggests.</p> <p><strong>EDIT</strong> can anyone help me out please? i really need this</p>
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    1. COSeems like the ID3 header is missing part way. Any chance you can share the file, and we could take a look at it?
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      1. USTankorSmash
    2. CO@TankorSmash from file you mean the audio file or the code that extracts the id3 header? As the answer by J. Andrew Laughlin tells, all characters are not printable so maybe that's why the data is incomplete?
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    3. COI meant the audiofile, I currently use Python, and I could take a look at it, and see if there actually is missing data, or it's just unprintable. Unless you got it handled, then you're all set?
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