Example of how to pull the raw data out a deprecated frame type with TagLib

tdat-test.cpp

#include <mpegfile.h>
#include <id3v2tag.h>
#include <unknownframe.h>

int main(int argc, char *argv[])
{
    for(int i = 1; i < argc; i++)
    {
        TagLib::MPEG::File f(argv[i]);
        TagLib::ID3v2::Tag *t = f.ID3v2Tag(false);
        if(!t)
            continue;
        TagLib::ID3v2::UnknownFrame *tdat =
            dynamic_cast<TagLib::ID3v2::UnknownFrame *>(t->frameList("TDAT").front());
        if(!tdat)
            continue;
        TagLib::String date(tdat->data().mid(1), TagLib::String::Type(tdat->data()[0]));
        std::cout << date << std::endl;
    }

    return 0;
}