Switch -M<n> - set compression method
Choosing <n> from 0 to 5 you may select an appropriate compression method
| -m0 | Store | Add files to archive without compression |
| -m1 | Fastest | Fastest method (least compressive) |
| -m2 | Fast | Fast compression method |
| -m3 | Normal | Normal (default) compression method |
| -m4 | Good | Good compression method (more compressive) |
| -m5 | Best | Best compression method (most compressive but also most slow) |
If this switch is not specified, WinRAR uses "-m3" method (Normal compression).
By default, WinRAR uses only the general compression algorithm in -m1 and -m2 methods, advanced algorithms like audio and true color processing are enabled only in -m3..-m5 modes, the advanced text compression is activated only in -m4..-m5. This default can be overridden using -mc switch.
The compression method also can be selected through the "Compression method" list in the Archive name and parameters dialog.