MetaData::MetaData(std::string path)
{
    Exiv2::XmpParser::initialize();
#ifdef EXV_ENABLE_BMFF
    Exiv2::enableBMFF()
#endif
    Exiv2::Image::AutoPtr  image = Exiv2::ImageFactory::open(path);
    assert(image.get() != 0);
    image->readMetadata();
    Exiv2::ExifData &exifData = image->exifData();
    size_t count = 0;
    size_t length = 0;
    KeyMetadata *km = new KeyMetadata;
    for (Exiv2::ExifData::const_iterator i = exifData.begin(); i != exifData.end(); ++i) {
        length++;
    }

    for (Exiv2::ExifData::const_iterator i = exifData.begin(); count++ < length; ++i) {
        if (km->find(i->key()))
            MetaData::metaData[i->key()] = i->value().toString();
    }
}