CSO to ISO decompressor?

Discussion in 'PSP - Games & Content' started by zeromac, May 19, 2010.

May 19, 2010

CSO to ISO decompressor? by zeromac at 8:42 AM (6,412 Views / 0 Likes) 19 replies

  1. zeromac
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    Member zeromac Finally reached 1000 posts EXACTLY

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    Well I've just started playing my GTA: Liberty City Stories.cso and it runs soo dam slow. Not game-breaking slow but really annoying slow. I've been trying to decompress it back into a ISO file but all the converters I've tried made it into a iso file but it was even smaller than the original CSO file!

    So i was wondering if you guys knew any CSO decompressors that actually worked?..

    [​IMG]
     
  2. BoxShot

    Member BoxShot Chiyo-chan :3

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  3. zeromac
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    Member zeromac Finally reached 1000 posts EXACTLY

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    Tried that one but i tried the 1.3 version, may as well give it a shot.

    EDIT: Nope, It still converts it to ISO and is only 168mb [​IMG]
     
  4. dib

    Member dib GBAtemp Advanced Maniac

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    It sounds like you probably grabbed some ripped version and will have to redownload. And in any case there is no conversion to be made--you could simply extract all the files then add them into umdgen and save an iso and it would be playable.
     
  5. steve-p

    Member steve-p GBAtemp Advanced Fan

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    not UMDgen, it isnt reliable.

    i use a good one called "Yacc"
     
  6. xist

    Member xist ΚΑΤΑ ΤΟΝ ΔΑΙΜΟΝΑ ΕΑΥΤΟΥ

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    ^That.

    Always use YACC.
     
  7. ViRGE

    Member ViRGE GBAtemp Fan

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    How is UMDGen unreliable?
     
  8. Zerousen

    Member Zerousen 【=◈︿◈=】

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    I decompressed alot of my CSOs,and they are always worse than they were before.
     
  9. CrashmanX

    Member CrashmanX Current project: SD Gundam G Generation Overworld

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    Hmmm, Ill have to remeber this from now on. I've never used UMDGen for decompressing but I'll take that into consideration next time.
     
  10. steve-p

    Member steve-p GBAtemp Advanced Fan

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    umdgen is great for editing and compressing,
    just dont trust it to decompress.
     
  11. dib

    Member dib GBAtemp Advanced Maniac

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    Why? Because somebody on the internet said so without anything to back it up?
     
  12. Infinite Zero

    Member Infinite Zero Almost!

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    Well, if you think its so safe how about YOU do the decompressing?
     
  13. zeromac
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    Lol chill guys I'll just try YACC no need to argue which is better

    So with that program, i should just be able to extract the cso and then rebuild it as a iso?

    Btw with my cso, it has the music ripped from it
     
  14. Teny

    Member Teny GBAtemp Regular

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    I've used YACC, PSP compressor, and UMDgen to compress and decompress all my ISOs. I have been using those for about 2 years now (or at least back when OFW 3.50 came out). I never had any problems.
     
  15. Teny

    Member Teny GBAtemp Regular

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    YACC should only compress/decompress the CSO as far as I know. UMDgen is what you need to extract/make an ISO.
    Pretty sure that's why it's 168 MB. The music file is pretty big. I think it's nice since the original ISO is ~1GB, and you can use the ripped space for your own music instead.

    Sorry for the double post. I'm used to an forum that does an automerged double-post thing.
     
  16. zeromac
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    Member zeromac Finally reached 1000 posts EXACTLY

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    Ah ok so i get UMDgen and extract my .cso and rebuild it as a .iso

    No need for anything elese?
     
  17. zeromac
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    Member zeromac Finally reached 1000 posts EXACTLY

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    Ok i extracted the .cso and now a folder is sitting on my desktop, how do i rebuild it into a .iso?

    EDIT: Awesome, just saved it as a .iso and it made it bigger [​IMG] time to test
     
  18. Jolan

    Member Jolan Unlimited Bear Works

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    uh, just use YACC and set it to "decompress".
    Much easier.
     
  19. dib

    Member dib GBAtemp Advanced Maniac

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    Isn't that what I said the first time? 'you could simply extract all the files then add them into umdgen and save an iso and it would be playable'

    It's not an issue of which is better. It's whether you want to have two programs to perform the same function when one of them does this and more. Also with people accusing umdgen of somehow being unreliable when its functionality depends on reading and writing iso and cso, and it does both.
     
  20. CrashmanX

    Member CrashmanX Current project: SD Gundam G Generation Overworld

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    You dont even need to "Extract" all the files, you can just open up the CSO and then choose save as .ISO.
     

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