ition, changing_slice_group_idc equal to 2 indicates that when all macroblocks in slice group 1 within the changing slice group period are decoded, decoded pictures will be correct or approximately correct in content at and subsequent to the specified recovery point in output order regardless of whether any macroblock in slice group 0 within the changing slice group period is decoded. changing_slice_group_ide shall be in the range of 0 to 2, inclusive. D.2.8 Decoded reference picture marking repetition SEI message semantics The decoded reference picture marking repetition SEI message is used to repeat the decoded reference picture marking syntax structure that was located in the slice headers of an earlier picture in the same coded video sequence in decoding order. original_idr_fla shall be equal to 1 when the decoded reference picture marking syntax structure occurred originally in an IDR picture. original_idr_flag shall be equal to 0 when the repeated decoded reference picture marking syntax structure did not occur in an IDR picture originally. original_frame_num shall be equal to the frame num of the picture where the repeated decoded reference picture marking syntax structure originally occurred. The picture indicated by original_frame_num is the previous coded picture having the specified value of frame_nur The value of original_frame_num used to refer to a picture having a memory_management_control_operationequal to 5 shall be 0. original_field_pic_flag shall be equal to the field_pic_flag of the picture where the repeated decoded reference picture marking syntax structure originally occurred. original_bottom_field_flag shall be equal to the bottom_field_flag of the picture where the repeated decoded reference picture marking syntax structure originally occurred. dec_ref_pic_marking() shall contain a copy of the decoded reference picture marking syntax structure of the picture that has a value of frame num equal to original_frame_num. The IdrPicFlag used in the specification of the repeated dec_ref_pic_mark