The above is the extra_data in the lhvC box in the 3D format of Apple's Vision Pro, which only contains sps/pps; I can know that 0xa1 is sps nultype, 0x00 01 is the number of sps, and 0x00 17 is the length. But what is the 0x01 f0 00 fc c3 02 at the beginning, and I can't find the corresponding definition.