Drastic Compression for PS1 games on PSP

Yeah, this whole thing is pretty bunk. Over at QJ, another guy mentions a method using PSMPlay and PSXLoader saying that he ripped Silent Hill to about 50 mb and the music still worked.. well, that would be the exception, because all that method is doing is stripping the games of their STR and XA audio files. Most PS games that have these use them for the game's music, so, sure, you could strip SotN down to 50 mb, but there will be zero music, which would ****ing suck.

Stick to PSX2PSP compression. Messing around with all of this just isn't worth it.

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Originally Posted by Wrrryyy

Yeah, this whole thing is pretty bunk. Over at QJ, another guy mentions a method using PSMPlay and PSXLoader saying that he ripped Silent Hill to about 50 mb and the music still worked.. well, that would be the exception, because all that method is doing is stripping the games of their STR and XA audio files. Most PS games that have these use them for the game's music, so, sure, you could strip SotN down to 50 mb, but there will be zero music, which would ****ing suck.

Stick to PSX2PSP compression. Messing around with all of this just isn't worth it.

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Yeah, CSOTN would BLOW without music. It has a tight soundtrack. I agree.

Stick to what works. I would be nice for 50 mb games but unfortunately its just a vivid wet dream atm.

more info has surfaced -
It seems the LBA arrangement will have a big impact on whether or not the game you're tweaking will actually run.

For the sake of clarity, we're going to post two additional comments made by Garrett and Devilgun that should fix most of your problems. If not, then there may be something else getting in the way of getting your games to work properly.

Garrett's comment:


You can do so with ISOBuster by exporting a Tree File, and then using CDGENPS2's advanced menu to import it (this is a new discovery to me too, as none of my LBA's were changed thru drag + drop).





Also, you can fix them manually by comparing the LBA section from whatever ISO utility you are using with the LBA in CDGENPS2. Starting from the top, compare the LBA and change it accordingly by: right-clicking the file, and clicking propeties. Check the FIX LBA box type in the correct LBA value.


Devilgun's comment happens to explain the manual fix by having many exclamation points. We took notice of that, and Garrett did too, as he confirms Devilgun's comment. Here's his step-by-step guide, though you'll need MagicISO for it:

Open the iso/bin with MagicISO
Now you can see the data AND the !!!LBA!!! Information
Copy the Data to a new Folder on Harddisk or just drag and drop it to CDGENPS2
!!!!!NOW!!!!! LOOK AT THE LBA Information in CDGENPS2. IT has to be the SAME for each File as in MagicISO - So order the files, so that the LBA is exactly the same.
Make the IMG
Compress it with pops.
Play it!

Have you Vega or anyone else tried this new method and confirmed it working? I'd like to try it but it's going to take me awhile to get magicISO so I won't be able to test it anytime soon.

not yet, im kinda busy, was going to start last night but ended up busy. gonna try this out after my dinner (yum yum)

i'm having trouble making the cd image from cdgenPS2. I drag and drop the files from Magic ISO into cdgenPS2.
Then I changed the LBA in cdgenPS2 to what is displayed in MagicISO.
In cdgenPS2 I then go to "create cd" and save as a bin or iso (tried both) and the image files come out to be around 700kb... so when I try to compress with popstation the files come out to be about 1-2mb, which I know is not right. >< is there a step im missing in here?

Quote:

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Originally Posted by Vega

more info has surfaced -
It seems the LBA arrangement will have a big impact on whether or not the game you're tweaking will actually run.

For the sake of clarity, we're going to post two additional comments made by Garrett and Devilgun that should fix most of your problems. If not, then there may be something else getting in the way of getting your games to work properly.

Garrett's comment:


You can do so with ISOBuster by exporting a Tree File, and then using CDGENPS2's advanced menu to import it (this is a new discovery to me too, as none of my LBA's were changed thru drag + drop).





Also, you can fix them manually by comparing the LBA section from whatever ISO utility you are using with the LBA in CDGENPS2. Starting from the top, compare the LBA and change it accordingly by: right-clicking the file, and clicking propeties. Check the FIX LBA box type in the correct LBA value.


Devilgun's comment happens to explain the manual fix by having many exclamation points. We took notice of that, and Garrett did too, as he confirms Devilgun's comment. Here's his step-by-step guide, though you'll need MagicISO for it:

Open the iso/bin with MagicISO
Now you can see the data AND the !!!LBA!!! Information
Copy the Data to a new Folder on Harddisk or just drag and drop it to CDGENPS2
!!!!!NOW!!!!! LOOK AT THE LBA Information in CDGENPS2. IT has to be the SAME for each File as in MagicISO - So order the files, so that the LBA is exactly the same.
Make the IMG
Compress it with pops.
Play it!

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I had been messing with this from the very beginning and I still have the same problems. Even tweaking last night still solved nothing, my LBA has been correct the entire time. There must be something else to the problem.

i have try everything and can't get gran turismo 2 to shrink. Even with this it still the same compressed size. Im hoping it gets fixed or something because I only have a 512 mb stick(468 mb useable.)

Yeah this is definitely quite iffy... For Castlevania I got this fun thing where I just couldn't set the LBAs correctly (after I entered the information it would just put a W next to the number it kept [which was always a duplicate of some folder]) and it wouldn't let me save the iso to even test it because there were duplicates.

Then I moved onto Final Fantasy Tactics, which produced the same variety of ultra-problem, though for that one I actually imported the LBAs from IsoBuster (which I didn't do for Castlevania, super glad I'm not employed in data entry, that was boring AND fun at the same time).

Then I finally got the LBAs set correctly for Parasite Eve, which compressed the iso down about 60MB, and the eboot from 330MB to 83MB after compression. And then of course a cool black screen. So you know, I tested whether or not it was just incompatible with popstation's compression by using compression level 0 which gave a 422MB eboot (as compared to the original .iso's 473MB), but alas, still black screen misery.

Oh and in case it matters, I'm on 3.03 OE-A (haven't really felt the need to update to OE-B, though I might just to test if there's a difference)

Interesting prospect, and definitely one to follow up on for our friends lacking a large memory stick, the only functions needed are the whole obvious 'good success rate' thing, and automatic importing of LBA values rather than having to go to the trouble of manually inputting them or dealing with importing them from IsoBuster. Wee!

Quote:

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Originally Posted by Andy6000

Yeah this is definitely quite iffy... For Castlevania I got this fun thing where I just couldn't set the LBAs correctly (after I entered the information it would just put a W next to the number it kept [which was always a duplicate of some folder]) and it wouldn't let me save the iso to even test it because there were duplicates.

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Out of interest, I think the problem here was you hadn't set the LBA for the folders correctly, that's why there were clashes.

Anyway, I know nobody seems to have gotten this working with popstation, but has anyone tried the shrunken ISOs with other PS1 emulators? Interestingly I managed to shrink MK Trilogy down to about 45megs and it worked fine with epsxe, just not with popstation.