'The type of scan found in the name
e.g. `i` for Interlaced, `p` for Progressive Scan
:returns: an empty string if not found'

@property
def scan(self):

    attr = u'res'
    match = self._get_match_obj(attr)
    return (match.group(u'scan').lower() if (match and match.group(u'scan')) else u'')
