Very Advanced Packing techniques - SFK Live Patch. 'Part 2'

[Dragonis40]

Good morning! Is there any guide to use this tool?
If I have a generic videogame with generic .xxx files, how can i use this tool on videogame?
Starting from an installed videogame, which are the needed steps to compress videogame using SFK?
What does "sfk partcopy re_chunk_000.ok -fromto 991941787 1309235054 1.dat -yes" and all other instructions mean?
Unfortunately, these tools are almost never clear

[L33THAK0R]

Originally Posted by Dragonis40

Good morning! Is there any guide to use this tool?
If I have a generic videogame with generic .xxx files, how can i use this tool on videogame?
Starting from an installed videogame, which are the needed steps to compress videogame using SFK?
What does "sfk partcopy re_chunk_000.ok -fromto 991941787 1309235054 1.dat -yes" and all other instructions mean?
Unfortunately, these tools are almost never clear

In layman's terms this command is copying all the data from the offset (in decimal) 991941787 to the offset 1309235054, and saving the output into a new file named 1.dat

This tool is only useful if you're trying to rip specific chunks of data to either re-encode or to pack separately. An example of the latter would be if you find say some audio data or a Bink video file that can have their applicable compressor applied. The reason we do this is simply adding an additional and specific compressor to an existing chain can introduce instability and possible corruption as well as potentially resulting in a worse final compression ratio.

From the brief scenario you've outlined I don't believe your project would benefit from this method, however if you provide more detail I could very much be wrong.

[wareck]

Hello
I am studying this method...
indeed i get good results on block processing (ogg, png)
i've also realized that softs like oggre or lolz compress a large block better than several small files
(for example, for oggre, deduplication is better on a large file than on individual small files)

in short, I like it, it's time-consuming to build and takes a bit longer to decompress, but it works well.

I'll take this opportunity to share the little program I compiled from source code this weekend.

It's sfk's partcopy function alone.
It just saves a few MB on the final archive by not copying sfk in its entirety.



to use it :

partcopy re_chunk_000.ok -fromto 991941787 1309235054 1.dat

(remove sfk at begin and -yes at the end...


@For L33THAK0R:
this instruction is for copying a part of a big file (re_chunk), we take a portion begin at 991941787 and finish at 1309235054 and export this bloc to a new file called 1.dat

in simple words, we concatenate small files in a big one , compress with your favorite program, because you concatenate same kind of file, optimized compressor will give better results

then during install decompress then separate files

best regards