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

[L33THAK0R]

Uses Kraken, after testing with KaktoR's Oodle library collection, v2.9.0 seems to yield the best results, however even with this library a considerable number of streams are dropped. Against the attached sample 88/231 steams are processed (full recompression currently, as reported by XTool, indicates 6248/7387 streams are processed), verbose output indicates streams are at a depth of L4.

xtool 0.7.8 (-mkraken:l4:n128:t256+zlib+reflate) + srep + lolz

It should be noted that it seems at least with the current library re-compression isn't very effective, with the reinflated output only being ~10MB larger than the initial input. The original Oodle DLL matches the CRC-32 checksum for library v2.6.0, when compared against KaktoR's kindly supplied checksums for all current library.

16,606,744,418 => 14,348,641,273 bytes. Ratio 86.40%

[Masquerade]

What does the Oodle srream scanner say?

[L33THAK0R]

Originally Posted by Masquerade

What does the Oodle srream scanner say?

Here is the output for the stream scanner, as well as the output for the library checker.

[Masquerade]

No, I meant the oo2scan_7_win64.exe by Razor12911, as it lists these algorithms:

Universal Oodle stream scanner

Created by Razor12911

[0] = Unknown/Invalid
[1] = Kraken/Hydra
[2] = Mermaid/Selkie/Hydra
[3] = Leviathan/Hydra

If you scan and you see [1] appearing, it could be that you are seeing Hydra streams, not kraken.

Try extracting a single stream from the sample you are testing on using XTool verbose output and a Hex editor and attempt to precompress it with oo2reck. If it *is* a Kraken stream, it will be inflated. Otherwise, try Hydra.

[L33THAK0R]

Originally Posted by Masquerade

No, I meant the oo2scan_7_win64.exe by Razor12911, as it lists these algorithms:

Universal Oodle stream scanner

Created by Razor12911

[0] = Unknown/Invalid
[1] = Kraken/Hydra
[2] = Mermaid/Selkie/Hydra
[3] = Leviathan/Hydra

If you scan and you see [1] appearing, it could be that you are seeing Hydra streams, not kraken.

Try extracting a single stream from the sample you are testing on using XTool verbose output and a Hex editor and attempt to pre-compress it with oo2reck. If it *is* a Kraken stream, it will be inflated. Otherwise, try Hydra.

I'm seeing results for both [1] and [3], however using XTool's GUI and testing each library against the sample, now with both the Kraken and Hydra codecs, still results in the same number of streams being successfully pre-compressed, when compared to only using Kraken. I've got a feeling it may in this case be Leviathan & Kraken, and I'm aware of how annoying Leviathan is to process since theres a notable manual element to pre-compressing this Oodle variant. I might investigate this title further, at some point in the future, once I'm more confident with working with undocumented Oodle titles.