def h5features_convert(self, infile):
        """Convert a h5features file to the latest h5features version."""
        with h5py.File(infile, 'r') as f:
            groups = list(f.keys())
        for group in groups:
            self._writer.write(
                Reader(infile, group).read(),
                self.groupname, append=True)
Convert a h5features file to the latest h5features version.