Except as otherwise in this chapter provided, no warrant of arrest shall be issued by a magistrate against any person within the terms of this chapter, but all proceedings shall be instituted upon petition as aforesaid, provided that upon affidavit of the spouse or other person that there is reasonable cause to believe that the spouse or parent is about to leave the jurisdiction of the court with intent to desert the spouse, child or children, the court of, or any magistrate serving, the city or county may issue a warrant for the spouse or parent returnable before the court.