'Get vlm_media instance chapter number by name or instance id.
@param psz_name: name of vlm media instance.
@param i_instance: instance id.
@return: chapter as number or -1 on error.
@bug: will always return 0.'

def vlm_get_media_instance_chapter(self, psz_name, i_instance):

    return libvlc_vlm_get_media_instance_chapter(self, str_to_bytes(psz_name), i_instance)
