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 Post subject: RevHeadz .obb extraction
PostPosted: Sat May 23, 2020 4:16 pm 

Joined: Sat May 23, 2020 3:24 pm
Posts: 1
Greetings,
I'm willing to extract the fev and fsb data from this app.
it's an app that simulates car engine sounds and uses FMOD which supports the fev and fsb format.
The obb doesn't have any meaningful header, it's header is the following binary (0100 0000 2101 0000 0B00 0000).
My assumption is that there is no encryption and compression at all because I can read addresses and directories as plain text however I can't open the file using 7zip or WinRAR.

The structure of the file as far as I could understand is like this:

an unknown header
all directories and addresses
---
properties of each sound like rpm, gear counts, etc...
3 chunks of data (these should be the fmod bank files, the files-bank, strings-bank, and master-bank)
*these datas get repeated 63 times representing the 63 engine sounds of the app.

so I tried to copy the first bank data into a new file with .bank extension and extract it by the Fmod Bank Tools app but this throwes me errors.

can someone please guide me through?
thanks a lot.

main.37.au.com.revheadz.revheadz.obb
obb file for reference but I only kept up to 3 chunks repeated and removed the rest.


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