[elit]

I tried tarring folder into single file, did not help still get stuck. There was enough free memory so its not memory leaks either. I dont know why it get stuck when same "problematic" individual file pass fine. I dont think it have to do with file itself I think app get into loop stuck.

That said zlib scan works great so its only lzo(and maybe lz4 and/or others), in fact zlib scan is better than ds4zlib including its headerless and force detection option. That one only found few mb's whereas GFS found over gb in latest arma 3.

EDIT: OK maybe I found something. In GR W game LZO kept hanging until I increased chunk size sufficiently. Anything below 256mb hanged but at 256 it consistently passed. Also I recommend 1 thread because even though it did not caused hanging, it still screwed calculation at one point - badly(at least for that game). So for LZ4 & LZO I recommend use 1 thread and start with big enough chunk size, then scale down. I will try it more in later days. Hanging looks like giving you a hint to use bigger chunk size for recompressor.

Zlib is fine at any setting and never hang but I suspect it *maybe* give false positives sometimes. Either that or recompressors are not as advanced yet. I tested on one .forge file from GR W game, scanner showed possibility of unpack by few hundred mb's(with dynamic streams), but I couldnt get it with anything I tried, at any settings. I tried precomp(+intense), ztool(pzlib:ultra, :m3, :x etc...), pzlib3 but no go I got exact same file size.

EDIT2: Also DS4LZ4 give different size for Mirrors Edge Catalyst. GFS find about 7gb(packed) and DS4LZ4 almost 11gb(packed)(and hang at 95%). Both same settings. I dont know which one to believe now.