e packing arrangement SEI message semantics This SEI message informs the decoder that the output cropped decoded picture contains samples of multiple distinct spatially packed constituent frames that are packed into one frame using an indicated frame packing arrangement scheme. This information can be used by the decoder to appropriately rearrange the samples and process the samples of the constituent frames appropriately for display or other purposes (which are outside the scope of this Specification). This SEI message may be associated with pictures that are either frames or fields. The frame packing arrangement of the samples is specified in terms of the sampling structure of a frame in order to define a frame packing arrangement structure that is invariant with respect to whether a picture is a single field of such a packed frame or is a complete packed frame. frame_packing_arrangement_id contains an identifying number that may be used to identify the usage of the frame packing arrangement SEI message. The value of ame_packing_arrangement_ id shall be in the range of 0 to 232 - 2, inclusive. Values of ame_packing_arrangement_id from 0 to 255 and from 512 to 231 - 1 may be used as determined by the application. Values of frame_packing_arrangement_id from 256 to 511 and from 231 to 232 - 2 are reserved for future use by ITU-T | ISO/IEC. Decoders shall ignore (remove from the bitstream and discard) all frame packing arrangement SEI messages containing a value of frame_packing_arrangement_id in the range of 256 to 511 or in the range of 231 to 232 - 2, and bitstreams shall not contain such values. frame_packing_arrangement_cancel_flag equal to 1 indicates that the frame packing arrangement SEI message cancels the persistence of any previous frame packing arrangement SEI message in output order. rame_packing_arrangement_cancel_flagequal to 0 indicates that frame packing arrangement information follows. rame_packing_arrangement_type indicates the type of packing arrangement of the frames as specified in Table D-8. 