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 Posted: Sat, 20th Nov 2004 02:02 Post subject: Archive compression? |
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i know this should go in technical but canbe used here too.
PS2.-.Action.Replay.2.20.Hacked.by.DNKROZ.PAL.rar = 4mb but the bin inside is 800mb. how does this work? i got told it was compressed with UHARC, but if its true why dont all groups release games in this format? i mean they casn distribute a 4mb rar a lot faster than 50 15mb rars. ive been told its hard to use as well, but surely experts like them can use it easy enough :S
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| Posted: Sat, 20th Nov 2004 02:12 Post subject: |
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You can compress a 10meg text file into 6k with winrar, its just a simple file to compress. Uharc might have a bit stronger compression, but nothing huge.
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| Posted: Sat, 20th Nov 2004 02:13 Post subject: |
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but a 800mb bin into 4mb YES 4, just doesnt happen. and doesnt answer my question why groups dont release them in this format.
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Esel_Gesi
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Posts: 3802
Location: Chicago
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| Posted: Sat, 20th Nov 2004 02:16 Post subject: |
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well i remember getting a few dreamcast games that were like 40 MB and extracted to 800. I think what the deal was (and maybe someone can confirm or give correct info?) that the file sometimes needs to fill the entire cd to work properly. So it really isnt compressing 800MB worth of data to 4mb, its just that the data that is taking up the extra 796 MB is just blank to fill up the disc. this is how i perceived it to be. I might be wrong.
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| Posted: Sat, 20th Nov 2004 02:21 Post subject: |
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or look at it in a different angle, for example take the same pic in bmp and jpg, the jpg will loose a few k's but the bmp might loose 1mb compressed with winzip. so its easier to fully compress files if they are like the bmp example.
But on the other hand, 800mb-->4mb is pretty impressive.
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| Posted: Sat, 20th Nov 2004 02:22 Post subject: |
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no i think its just movies that cant be compressed. and yup some dreamcast games were compressed. u can get 1.5GB in a 50mb rar but i wanna know how to do it. would save me a lot of time, and if i could compress all my games into 4mb rars i could fit about 100 on a DVD 
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spankie
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| Posted: Sat, 20th Nov 2004 02:23 Post subject: |
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dude, if data+movies were really compressed that much, i dont think we'd be using DVD9s anymore....
so must be something else.
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| Posted: Sat, 20th Nov 2004 02:29 Post subject: |
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| Esel_Gesi wrote: | | well i remember getting a few dreamcast games that were like 40 MB and extracted to 800. I think what the deal was (and maybe someone can confirm or give correct info?) that the file sometimes needs to fill the entire cd to work properly. So it really isnt compressing 800MB worth of data to 4mb, its just that the data that is taking up the extra 796 MB is just blank to fill up the disc. this is how i perceived it to be. I might be wrong. |
This is the correct answer in a way.
If you look at action replay 2.2 there are many rips released that is only like 3mb when not compressed. So yeah when something is this much compressed (or so it seems) it's not really 800mb of data, more like a few mbytes of data, the rest is just crap basicly. Thats why you cant compress pc games and movies and such things this good because they are 100% data.
The scene isn't stupid. If you could compress movies, games etc to such small files they would. No one wants to use more bandwith than needed.
Last edited by pallebrun on Sat, 20th Nov 2004 02:32; edited 1 time in total
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Esel_Gesi
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| Posted: Sat, 20th Nov 2004 02:31 Post subject: |
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hooray!!... maybe im not as dumb as they say  
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| Posted: Sat, 20th Nov 2004 02:37 Post subject: |
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SirCez
Posts: 357
Location: UK
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| Posted: Sat, 20th Nov 2004 03:50 Post subject: |
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Its just a dummy file, nothing else.
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| Posted: Sat, 20th Nov 2004 08:59 Post subject: |
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uharc really has high compression ratio's . all the rips use those *.uha .
i had bad boys 2 in 400mb's but uncompressed the *.uha it was 2 cds :]
really nice. i dunno why they don't use it on bin/cue , maybe becuz you can't . the bin/cue is 1 track of data while rips compress the mp3's , pics & so on so it can get those very high compressions.
if im wrong , someone please point out the mistake ;]
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| Posted: Sat, 20th Nov 2004 09:24 Post subject: |
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I think it has to do with the type of files being compressed, as someone said you can compress a text file to prob 100th of its original size..
some files just cannot be compressed so well.. i assume its cos they are already compressed as far as possible.. such as jpeg files.. but a bmp file will compress well..
uharc is ok but its damn slow! all the rip groups use it hence why you can sometimes get a full iso onto 30*5 meg files
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| Posted: Sat, 20th Nov 2004 09:36 Post subject: |
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Jpeg = bmp compressed .
like is mp3 = wav compressed ;]
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| Posted: Sat, 20th Nov 2004 10:02 Post subject: |
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if Emporio had ceate a little installer for theire release they could have released it as RIP instead of ISO that way release would not have been nuked by the lame nforce nukers..
and now ontopic ,dreamcast and some ps2 games have dummy files on it thats why some games can be compressed so much 800 mb dummy file is compressed 4 mb or so. with normal files this is not possible.
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razor1394
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| Posted: Sat, 20th Nov 2004 10:33 Post subject: |
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1. For like the 10th time, nforce doesn't nuke anything.
2. I believe this phonomena has much to do with the amount of dummy data like the NTSF compression works.
3. I also don't understand why groups are using nearly 1:1 compression. What about 7zip, that format is awesome.
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| Posted: Sat, 20th Nov 2004 12:00 Post subject: |
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well a dummy files does not contain much information.
imagine 3000 shoe boxes with just a 1"*1" piece of paper in each of them. now you want to compress these boxes so anyone could reproduce them. you could just take one shoe box and put all the papers in it and on top put a sheet of paper with "put each piece of paper in this box in an own shoe box, burn this one".
now imagine 3000 shoe boxes filled with different objects like shoes, food, pets. you will hardly fit them all in one box, but maybe with a little squeezing here and there in like 1500 boxes.
so it is the mass of information that makes the difference.
jesus christ was a gangsta rapper. they killed him. he came back and made a platinum album.
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| Posted: Sat, 20th Nov 2004 15:39 Post subject: |
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| toeffy wrote: | well a dummy files does not contain much information.
imagine 3000 shoe boxes with just a 1"*1" piece of paper in each of them. now you want to compress these boxes so anyone could reproduce them. you could just take one shoe box and put all the papers in it and on top put a sheet of paper with "put each piece of paper in this box in an own shoe box, burn this one".
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then u would need 3001 boxes because the space in each box doesnt get removed enough to fit another shoe in  . And i think it answers my suspicions ty. |
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| Posted: Sat, 20th Nov 2004 18:18 Post subject: |
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huch 800mb packed in 4mb?
and a file which is allready compressed cant be compressed 2nd time
btw 800mb in 4mb isnt possible
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Saner
Posts: 6875
Location: Uk
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| Posted: Sat, 20th Nov 2004 18:37 Post subject: |
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yes it is possibly.
Its depends what your compressing though, as said before in this thread and I am sure it will be said after.
| ragnarus wrote: |
I saw things like that in here and in other "woman problems" topics so...... Am I the only one that thinks some authorities needs to be alerted about Saner and him possibly being a rapist and/or kidnapper ? |
Saner is not being serious. Unless its the subject of Santa!
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| Posted: Sat, 20th Nov 2004 19:03 Post subject: |
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Solution: (kind of)
I once wrote a program to create a text file of 800 MB which contained one sentence, but a zillion times.
Then I took WINRAR and compressed into a 50 kB file.
Impressive, huh?
So, it depends on what the file contains.
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Saner
Posts: 6875
Location: Uk
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| Posted: Sat, 20th Nov 2004 19:09 Post subject: |
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| manslaugh wrote: | then gimme a proof
i believe when i see it simple |
I dont have to proove anything to you, you dont beleive me fine... but its possible, just depends what you are compressing.
| ragnarus wrote: |
I saw things like that in here and in other "woman problems" topics so...... Am I the only one that thinks some authorities needs to be alerted about Saner and him possibly being a rapist and/or kidnapper ? |
Saner is not being serious. Unless its the subject of Santa! |
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| Posted: Sat, 20th Nov 2004 19:24 Post subject: |
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| Posted: Tue, 23rd Nov 2004 15:39 Post subject: |
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OK, thought I would give this a test!
Grabbed winuha (which is a free prog)
And set about trying its compression ratio, set against rar and zip..
used a few different files for compression.. and had it set at 'best' compression
overall theres a very minor difference in compression ratios..
But as any of you who may d/l rips will notice.. its not only uha myth and others use.. but they also have thier own little utils that inject mp3's etc into music files... fuck knows how they do it.. but they are clever bastards
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Lutzifer
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| Posted: Tue, 23rd Nov 2004 16:12 Post subject: |
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| manslaugh wrote: | huch 800mb packed in 4mb?
and a file which is allready compressed cant be compressed 2nd time
btw 800mb in 4mb isnt possible |
imagine a txt file with a gazilion zeros in it. It will be as big as you want it to be, depending on the number of zeros. Easy manual compression would be to write: multiply 10 by a gazilion and delete the 1. Should be less then 4mb even 
It also heavily depends on the type of compression. If groups use mp3s for the audio and jpgs for texture for example you have lossy compression, but depending on the setting the human eye/ear wont notice, still you ll lose/throw away original data so its easier to compress the rest.
As said above, it depends on the amount and the type/quality (e.g. non-redundant info) of data and how it is structured (e.g. some compressions dont do jack on video-data streams while others do it significantly better, although video data is always hard because the info changes so fast and its hard to find compression rules to simplify the data without losses) |
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| Posted: Thu, 25th Nov 2004 05:48 Post subject: |
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| VyRuZRuLeZ wrote: | Jpeg = bmp compressed .
like is mp3 = wav compressed ;] |
I disagree.
A jpeg is basically a gigantic instructional manual for re-creating a picture, whereas BMP is just the picture, pixel-by-pixel. JPG is basically a formula for making the pic, which says "green goes here, here, and here, add with 10%blue here, there, and there," and BMP is "PIXEL: 800x426 COLOR: E00021; PIXEL: ..."
A WAV or other lossless format is basically every bit of information about a piece of audio, whereas an MP3 is basically the same shit as a regular wav, except 90% of it has been cut out (that much useless junk in a WAV, peeps) |
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