Repack DriverPack's (Page 2 of 2)

Hey, I'm back, and I've recently been looking into different compression tools for my own purposes. One such tool I've come across is "Precomp", which is preprocessor that can make a bit-to-bit identical recompression of compressed streams *inside* of files, which I think would get Driverpacks considerable savings as they're full of already compressed data. I think the most memory-intensive part of precomp is the compression, not the decompression. Use of precomp would require explicit support in the program, as it creates a "PCF" file. How you do it is put all desired files in a NON-compressed, non-solid archive, put the archive through precomp to make a PCF file, then make the archive as normal. I'll be testing it out with the Driverpacks to see if I can keep it at least below 256MB of memory required, if not less.

Dear Mr. BadPointer and experts,

Sorry to bother you all.

Please help: How (which switches to use) can I re-compress it back to 2.4GB of "DP_Videos_OEM_16060.7z" file after uncompressed it (to around  12.2GB)?

In other words, which switches/command the DriverPacks Team used to compress it to such extremely high ratio (I tried all the ways, such as your Repack2 batches, m7zRepack, Ultra/128MDictionary and reading samdrivers forum for guidance but unsuccessful).

Reason: for my knowledge and for a customized pack to use with your excellent Snappy Driver Installer).

Thank you all/Thao.