def METHOD_NAME(self, f, name):
    if name not in f:
        return []
    elif name == 'covr':
        ret = []
        for value in f[name]:
            if value.imageformat == mp4.MP4Cover.FORMAT_PNG:
                mime = 'image/png'
            else:
                mime = 'image/jpeg'
            ret.append(CoverImage(type=None, desc=None, mime=mime, data=value))
        return ret
    elif name in ['trkn', 'disk']:
        ret = []
        for value in f[name]:
            ret.append("%d/%d" % (value[0], value[1]))
        return ret
    elif name == 'rate':
        # Rating Stars
        data = int(f['rate'][0])
        rating = self._rating_to_stars(data)
        return [str(rating)]
    else:
        return [t for t in f[name]]