angle SEI message with the same value of pan_scan_rect_id may or may not be present. ban_scan_rect_repetition_period greater than 1 specifies that the pan-scan rectangle information persists until any of the following conditions are true: A new coded video sequence begins. A picture in an access unit containing a pan-scan rectangle SEI message with the same value of pan_scan_rect_id is output having PicOrderCnt() greater than PicOrderCnt( CurrPic ) and less than or equal to PicOrderCnt( CurrPic ) + pan_scan_rect_repetition_period. pan_scan_rect_repetition_period greater than 1 indicates that another pan-scan rectangle SEI message with the same value ofpan_scan_rect_id shall be present for a picture in an access unit that is output having PicOrderCnt() greater than PicOrderCnt( CurrPic ) and less than or equal to PicOrderCnt( CurrPic) + pan_scan_rect_repetition_period; unless the bitstream ends or a new coded video sequence begins without output of such a picture. D.2.4 Filler payload SEI message semantics This message contains a series of payloadSize bytes of value 0xFF, which can be discarded. ff byte shall be a byte having the value 0xFF. D.2.5 User data registered by Rec. ITU-T T.35 SEI message semantics This message contains user data registered as specified by Rec. ITU-T T.35, the contents of which are not specified by this Recommendation | International Standard. itu_t_t35_country_code shall be a byte having a value specified as a country code by Rec. ITU-T T.35 Annex A. itu_t_t35_country_code_extension_byte: shall be a byte having a value specified as a country code by Rec. ITU-T T.35 Annex B. itu_t_t35_payload_byte shall be a byte containing data registered as specified by Rec. ITU-T T. The ITU-T T.35 terminal provider code and terminal provider oriented code shall be contained in the first one or more bytes of the itu_t_t35_payload_byte in the format specified by the Administration that issued the terminal provider code. Rec. ITU-T H.264 (01/2012) Any remaining ut t_t35_payload_byte data shall be data ha