Best Compression Methods for 'Specific' Games. Q&A

[L33THAK0R]

Hi all, I hate to always ask the most silly questions but could anyone who's been able to successfully compress and decompress "PC Building Simulator" share the options/arguments/commands that they used for srep & lolz? My initial attempt with msc + srep + lolz (msc because of the .mp3 OST files incl.) failed to decompress with an UnArc.dll error of "-1". I re-attempted with just srep + lolz as per the advice of the forum user "Masquerade" and saw a significant (80mb) reduction in the final output, however decompression still failed, with the same error code (-1) as the first attempt given.

[:( Sad8669]

Originally Posted by L33THAK0R

Hi all, I hate to always ask the most silly questions but could anyone who's been able to successfully compress and decompress "PC Building Simulator" share the options/arguments/commands that they used for srep & lolz? My initial attempt with msc + srep + lolz (msc because of the .mp3 OST files incl.) failed to decompress with an UnArc.dll error of "-1". I re-attempted with just srep + lolz as per the advice of the forum user "Masquerade" and saw a significant (80mb) reduction in the final output, however decompression still failed, with the same error code (-1) as the first attempt given.

Yo, i ain't that good but that happened to me recently, and the reason behind these were:

The .dll used for compression and decompression must be same.
The external compressor in arc.ini must be configured correctly.
Try setting the same arguments used in packcmd for unpackcmd.
Try some other scripts just for experimental purpose.

In my case, it was FIFA 20 and the issue for the error was the oo2core_6_win64.dll.

The one used for compression was around 1,061 KB
And the one used for decompression was something 1,041 KB
So i just replaced the .dll and boom it worked.

As for your case, it must be something like CLS-MSC.dll and so on.

Also, if you compressed it using DiskSpan then make sure the .dll matches since there are different versions of DiskSpan.

Please let me know if it helped .

[Masquerade]

Originally Posted by L33THAK0R

Hi all, I hate to always ask the most silly questions but could anyone who's been able to successfully compress and decompress "PC Building Simulator" share the options/arguments/commands that they used for srep & lolz? My initial attempt with msc + srep + lolz (msc because of the .mp3 OST files incl.) failed to decompress with an UnArc.dll error of "-1". I re-attempted with just srep + lolz as per the advice of the forum user "Masquerade" and saw a significant (80mb) reduction in the final output, however decompression still failed, with the same error code (-1) as the first attempt given.

What srep are you using for decompression?

cls-srep, srepinside or srep.exe? Use cls-srep.

For the mp3 soundtrack, use a mask (arc.groups)

arc.groups file (next to arc.exe

$mp3
*.mp3

-msrep+lolz/$mp3=mpz

mpz is mpeg audio compressor.

[L33THAK0R]

Originally Posted by Masquerade

What srep are you using for decompression?

cls-srep, srepinside or srep.exe? Use cls-srep.

For the mp3 soundtrack, use a mask (arc.groups)

arc.groups file (next to arc.exe

$mp3
*.mp3

-msrep+lolz/$mp3=mpz

mpz is mpeg audio compressor.

Can confirm I'm using cls-srep, I'm honestly clueless as to what the cause of the issue is, but this seems to occur exclusively with Unity engine titles for me, with this and "112 Operator" both having issues with decompression. I resolved the latter by splitting the title into 2 archives (2nd archive contained .assets & .resource files which I identified as the files failing to decompress), which I hope may also help with this title. I'll have a look at mpz, as I assumed gains from it were similar, if not identical to that seen with msc, and as such have never tried it to compress mpeg audio. I'll test out my botched solution attempt and report back in a bit.