Input file: game.chd File Version: 5 Logical size: 650,000,000 bytes Hunk Size: 2048 bytes Total Hunks: 317,382 Compression: zstd If you have an old CHD (v3 or v4) and want v5:
chdman info -i game.chd Example output:
chdman createhd -i input.img -o output.chd chd files for mame
chdman copy -i old.chd -o new.chd -f 5 Place the .chd file in the appropriate folder inside your MAME ROMs directory. Input file: game