block2001 Posted December 3, 2014 Share 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... Link to comment
XJ347 Posted December 3, 2014 Share Posted December 3, 2014 No way 4 mb turns into 1 gig... Â Something went wrong. Link to comment
yatol Posted December 3, 2014 Share 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  Link to comment
Feng Posted December 3, 2014 Share 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. Link to comment
b3lisario Posted December 3, 2014 Share 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. Â 42 kb zip file to 4.5 petabytes http://en.wikipedia.org/wiki/Zip_bomb Link to comment
block2001 Posted December 3, 2014 Author Share 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!!!! Link to comment
Sdesser Posted December 3, 2014 Share 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. Link to comment
block2001 Posted December 3, 2014 Author Share 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* Link to comment
Rayblue Posted December 4, 2014 Share Posted December 4, 2014 Just wondering where did that overlay BSA came from what mod? Link to comment
block2001 Posted December 4, 2014 Author Share Posted December 4, 2014 http://www.nexusmods.com/skyrim/mods/30404/? Â This was the one I was using Link to comment
White Divinity Posted December 8, 2014 Share 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 " . Â checked the reason and it was because it contained 55 dds files , each of them was about 20mp . Link to comment
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