block2001 Posted December 3, 2014 Posted December 3, 2014 So today I decided that I was going to merge some files via the mod merging script for Tes5edit. In order to do so there were a few bsa's i needed to extract. So I thought why the hell not!! so here I am extracting some overlay textures from an overlay bsa that was about 4mb, however for some reason it was taking significantly longer than usual but i decided to wait it out, after about 8 mins it finally finished extracting the bsa. I was kinda irritated thinking that my bsa extracter was just shit and that I'll need to find a new one anyways I decided to check how big the folder was...this thing was freaking 1gb in size!!! no word of a lie!! How the hell can you stuff 1gig of data into freaking a 4mb bsa...yup bsa's are a scary thing...
XJ347 Posted December 3, 2014 Posted December 3, 2014 No way 4 mb turns into 1 gig... Something went wrong.
yatol Posted December 3, 2014 Posted December 3, 2014 How the hell can you stuff 1gig of data into freaking a 4mb bsa... it can't, when you loaded your bsa, one was already load and you unpacked like that, so both bsa were extracted
Feng Posted December 3, 2014 Posted December 3, 2014 I wonder how you tried to extract it. Here is a good tutorial as well as a table with example bsa and extracted texture file sizes.
b3lisario Posted December 3, 2014 Posted December 3, 2014 The bsa's can use a compression algorithm. I'm not sure which one, like zip or rar. At least for the common algorithms if the files are pretty much the same file over and over there can be a great reduction in size. And overlay textures are pretty similar to each other. 42 kb zip file to 4.5 petabytes http://en.wikipedia.org/wiki/Zip_bomb
block2001 Posted December 3, 2014 Author Posted December 3, 2014 The bsa's can use a compression algorithm. I'm not sure which one, like zip or rar. At least for the common algorithms if the files are pretty much the same file over and over there can be a great reduction in size. And overlay textures are pretty similar to each other. 42 kb zip file to 4.5 petabytes http://en.wikipedia.org/wiki/Zip_bomb So what your saying is that it is possible for that to happen then....42kb to 4.5petabytes!!! ok now thats insane!!!!
Sdesser Posted December 3, 2014 Posted December 3, 2014 Example: If your mod includes voice files for NPCs and they are blank audio files, they will be compressed to very small files, but their uncompressed size can still be quite large.
block2001 Posted December 3, 2014 Author Posted December 3, 2014 This is very interesting, I feel like I am learning so much today.I guess big things really DO come in small packages *wink wink*
Rayblue Posted December 4, 2014 Posted December 4, 2014 Just wondering where did that overlay BSA came from what mod?
block2001 Posted December 4, 2014 Author Posted December 4, 2014 http://www.nexusmods.com/skyrim/mods/30404/? This was the one I was using
White Divinity Posted December 8, 2014 Posted December 8, 2014 It's true, i just extracted that bsa using Mod Organizer imbedded Bsa extractor, it only toke like 10secs so i said " oh, i guess the problem was on his end " but i toke a look at the files just to be sure, and the size turned into 1GB ! " 984,283,356 bytes to be exact " . checked the reason and it was because it contained 55 dds files , each of them was about 20mp .
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