'Returns a possibly valid _ADTSStream or None.
Args:
max_bytes (int): maximum bytes to read'

@classmethod
def find_stream(cls, fileobj, max_bytes):

    r = BitReader(fileobj)
    stream = cls(r)
    if stream.sync(max_bytes):
        stream.offset = ((r.get_position() - 12) // 8)
        return stream
