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How to access Tags from Media Files?



  • Hi,

    Anyone can help me If Qt has any extensions for accessing tags (Artist, Album, Song, cover image etc info) from media (mp3) files. I saw ID3v2, It seems very tough to use that. I tried using TagLib but I'm getting one or other error :(
    Can someone help me if there is any good library?

    Thanks in Advance,
    inblueswithu



  • AFAIK there is nothing inside Qt. TagLib works quite fine for me, what errors do you get?



  • For now I'm thinking of using QMediaMetaData (just found a day ago) to get the current song data from media player.
    But for full fledged tags usage I need some library (like TagLib) as Qt does not have a in-built.
    I'll try again to compile it & will comeback for help.
    Thanks!



  • try this class:

    class Mp3Metadata
    {
    public:
    Mp3Metadata();
    virtual ~Mp3Metadata();
    QMap<QString, QString> getMp3Metadata(QString arquivo);
    private:

    };

    It works, but after the

    QMap<QString, QString> Mp3Metadata::getMp3Metadata(QString caminhoArquivo)
    {
    QMap<QString, QString> m;
    if(!caminhoArquivo.contains(".mp3"))
    return m;

    ifstream arquivo(caminhoArquivo.toLatin1().data(), ios::in | ios::binary);
    if(!arquivo)
    {
    return m;
    }
    char *tag = new char[3];
    arquivo.seekg(-128, ios::end);
    arquivo.read(tag, 3);
    QString QStag(tag);
    if(QStag != "TAG")
    {
    delete[] tag;
    return m;
    }
    char *titulo = new char[30];
    arquivo.read(titulo, 30);

    char *artista = new char[30];
    arquivo.read(artista, 30);

    char *album = new char[30];
    arquivo.read(album, 30);

    char *ano = new char[4];
    arquivo.read(ano, 4);

    char *comentario = new char[30];
    arquivo.read(comentario, 30);

    char *genero = new char[1];
    arquivo.read(genero, 1);

    QMessageBox *mb = new QMessageBox();
    QString s;
    s.append(tag);
    s.append("\n");
    s.append(titulo);
    s.append("\n");
    s.append(artista);
    s.append("\n");
    s.append(album);
    s.append("\n");
    s.append(ano);
    s.append("\n");
    s.append(comentario);
    s.append("\n");
    s.append(genero);
    mb->setText(s);
    mb->show();

    delete[] tag;
    delete[] titulo;
    delete[] artista;
    delete[] album;
    delete[] ano;
    delete[] comentario;
    delete[] genero;
    return m;
    }



  • @mehrdadsilver: Thank you for reply.

    But can you please specify the include files for this working & I'm not sure if this code is Spanish specific.!? Can you please clarity.
    By the way, can you please paste the code in between @ @ so that there wont be any special chars like those char power of 30 etc


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