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Getting close to 7zip GUI “Ultra” compression from a batch file

Posted by jpluimers on 2018/02/23

These are the command-line parameters I assembled to get close to “Ultra” compression from the 7-zip command-line:

"C:\Program Files\7-Zip\7z.exe" a -t7z -m0=lzma2:d1024m -mx=9 -aoa -mfb=64 -md=32m -ms=on -sdel filename archive.7z

This will move filename to archive.7z using maximum compression.

Sometimes this is slightly better than “Ultra” compression from the 7-zip UI, sometimes slightly worse, but never far apart.

via:[WayBackbatch file – 7zip Ultra LZMA2 compression – Stack Overflow


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