This topic was archived here:

https://web.archive.org/web/20230000000000fw_/https://www.zenhax.com/viewtopic.php?t=7961

3376027, posted Fri Jun 01, 2018 5:31 pm (35487)

---

assetStudio Open Import Blank.I don't know what format he used to compress it.Is there any way to decrypt it?
I ' upload the samples.

aluigi, posted Sat Jun 02, 2018 7:33 am (35498)

---

It's an "UnityLz4" file, basically just a new version of the Unity (unity3d?) files in which it's used lz4 compression instead of lzma (UnityWeb uses lzma, UnityRaw no compression).

AssetStudio should be able to read it indeed, but yeah it doesn't work and loads forever (*edit* I meant it shows nothing) so I tried to make a simple UnityLz4 to UnityWeb converter but AssetStudio crashes when loading it.

There is no encryption, you should contact the AssetStudio author.

In case someone is interested in my test script I leave it here (DO NOT USE IT!!!)

Code:

get NAME basename
get EXT extension
string NAME   "_new."
string NAME   EXT

endian big
idstring "UnityLz4"
get ZERO long
get DUMMY byte
get VER string
get BUILD string
get ASSET_SIZE long
get OFFSET long
savepos DUMMY_OFF
get DUMMY long
get DUMMY long
get ZSIZE long
get SIZE long

log MEMORY_FILE 0 OFFSET
putdstring "UnityWeb" 8 MEMORY_FILE
goto DUMMY_OFF MEMORY_FILE
put 1 long MEMORY_FILE

comtype lz4
clog MEMORY_FILE2 OFFSET ZSIZE SIZE
putvarchr MEMORY_FILE2 SIZE 0   # ???

log NAME 0 OFFSET MEMORY_FILE
append
comtype lzma_86head_compress
clog NAME 0 SIZE SIZE MEMORY_FILE2
append

3376027, posted Sat Jun 02, 2018 9:03 am (35501)

---

The author does not want to make it
So come here and ask for help
Can you do a small tool to solve it? I'm a rookie

aluigi, posted Sat Jun 02, 2018 11:10 am (35506)

---

I seriously doubt that the author of a tool updated so frequently and already covering the UnityLz4 format just "does not want to make it", if that's true he has his for sure real reasons (which means that it's better to not waste time on this stuff).

I did my test and didn't work so from me that's all.
If any other user has some ideas, they are welcome.

3376027, posted Sat Jun 02, 2018 12:17 pm (35510)

---

aluigi wrote:

I seriously doubt that the author of a tool updated so frequently and already covering the UnityLz4 format just "does not want to make it", if that's true he has his for sure real reasons (which means that it's better to not waste time on this stuff).

I did my test and didn't work so from me that's all.
If any other user has some ideas, they are welcome.

All right. Thank you. Your opinion