000 4-byte signature: 46 42 31 20 "FB1 "
   004 1-byte unsigned int: version number (for now it is always 2)

   000 4-byte chunk identifier: 46 53 31 20 "FS1 "
   004 4-byte little-endian unsigned int: size of this save state chunk in bytes, not including the chunk identifier
   008 4-byte little-endian unsigned int: version of FB this was saved from
   00C 4-byte little-endian unsigned int: minimum FBA version required to load NV data
   010 4-byte little-endian unsigned int: minimum FBA version required to load All data
   014 4-byte little-endian unsigned int: size of the compressed saved data (not including header size or padding)
   018 32-byte possibly-unterminated ASCII string: Name of the game
   038 4-byte little-endian unsigned int: number of frames that have already been emulated before recording started
   03C 12 bytes: reserved, set to 0
   048: the compressed save data

   000 4-byte chunk identifier: 46 52 31 20 "FR1 "
   004 4-byte little-endian unsigned int: size of this frame data chunk in bytes, not including the chunk identifier
   008 4-byte little-endian unsigned int: number of recorded frames
   00A 4-byte little-endian unsigned int: rerecord count
   00E 12 bytes: reserved, set to 0
   01A: frame input data. The format varies depending on which inputs the game supports and may be compressed (unknown).
        Reset is always a possible input, although the value that means Reset will be different depending on the game.

   000 4-byte chunk identifier: 46 52 31 20 "FRM1"
   004 4-byte little-endian unsigned int: size of the metadata in bytes, not including the chunk identifier or this integer
   008 string of little-endian 2-byte wide characters of locale-dependant encoding: author information