Computer Hope
Software => Computer software => Topic started by: Ryder17z on October 18, 2009, 12:05:34 PM
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I have had a few tools in the past days, but I can't find them
These tools could compress files extremely hard
They where better than 7z which is pretty good
I remember I compressed a few files and I still got the results file:
Uncompressed/Compressed
10MB/6MB
40MB/23MB
100MB/72MB
500MB/124MB
1GB/710MB
4GB/2.5GB
Note: These values might be wrong, but those tools used an extreme compression ratio
Also, these tools where freeware
Can anyone tell me where I can get such tools?
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Like you i was also tried to find the best compressed tools. But no one compressed more than half of the original size. One more thing is that the compression ratio is depend on the type of the file. For videos, it is very hard to compress but for text or programmatic or any installation files the compression ratio is good.
I preferred to use winrar as it supports allmost all types of compression files and gives better results of compressing.
One surprising news is that one day i tried to compress the windowsxp boot cd contents along with some softwares like ms office 2003, nero 7, vlc player etc..... worth the size of 3.5GHz, and I didn't believe that my .rar file size is of 2MB(Two mega bytes only) and I unpacked the contents the same 3.5gb are available to me........ really surprising.......
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I was looking around online and can't remember where but it said that the best compression tool is 7-zip in .7z format. I have not tested this so I am unsure if it is true. What I have seen is that with the right configuration that GTA3 was compressed to 50 MB. They used uharc compression tool and it wasn't the GUI version to compress all the music. I had to run a batch file in DOS to uncompress the music. The rest was just a standard SFX compression.
So what I am assuming is use UHARC and 7-zip combined to get the best compression.
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I have found some tools:
KGB Archiver
UHARC
These two seems to be the best today, but I haven't used them in several years..
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The amount of compression is more dependent on the file type than the tool being used.
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One surprising news is that one day i tried to compress the windowsxp boot cd contents along with some softwares like ms office 2003, nero 7, vlc player etc..... worth the size of 3.5GHz, and I didn't believe that my .rar file size is of 2MB(Two mega bytes only) and I unpacked the contents the same 3.5gb are available to me........ really surprising.......
heheh!
this really surprising!
btw, have you tried decompressing it to another pc?
I also use winrar for all my compression need.
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the 3.5GB of data was probably 2.0GB, not MB.
PowerArchiver with 7z set to maximum is able to compress my 500~MB project folder into a relatively tiny 70MB file, it's mostly text, which is probably why it compresses so well.
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I made a tool that calculated the percent values of each file type:
17% = Text Files (TXT, LOG)
11% = Images (PNG, JPG)
24% = Uncompressed Archives (CAB, IMG)
16% = Movies/Videos (AVI, MPG)
14% = Audio (MP3, OGG)
18% = Executables (EXE, COM, BAT)
Files: 27495
Folders: 219
Size: 17.87GB
It would be very nice if I could cram this stuff into my 4GB Flash Memory ::)
But it would be even better if it could fit on a single CD or my other 2GB Flash Memory
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No, no the 3.5gb is compressed into 2mb really. Next time i'l attach the rar file, I decompressed it and all the contents are retrieved again......... True.........
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No, no the 3.5gb is compressed into 2mb really. Next time i'l attach the rar file, I decompressed it and all the contents are retrieved again......... True.........
The only thing that can compress that much is when there is a lot of redundant data. Most of the Windows Disc contains already compressed data, in cab format. compressing it further will not yield very much further compression, and in fact might even make the file larger.
regarding the listing you made ryder17z, while many cab files are not compressed- almost all are. It was intended as a replacement for the previous method, where MS was compressing files using a small LZW compressor, (compress is available from the windows 3.1 sdk) as well as expand which expanded the files. they often had an underscore or dollar sign as the filename.
additionally, batch and script files should be listed as text files, not executables. executables contain strictly machine code or interpreted byte code, rather then plain text, as would be the case for batch or script files.
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I agreed 100% with patio's and BC_programmer's post. The compression size is depends on the type of the files. My compression consists of 98% of text related files (windows os , office and so on). It is just 2MB
Get download it and post me your comments on this compression
http://rapidshare.com/files/301697505/Windows_highcompression.rar (http://rapidshare.com/files/301697505/Windows_highcompression.rar)
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the "image" file is just 4 gigabytes of ascii character 0. It contains absolutely nothing. No "windows OS", "Office" or anything. Just null characters.
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It's a 3.20GB Nero Image file. As per your post :o I just downloaded and tested it (Mounted the .nrg image into nero image drive ) and I got the files.......
Try once... :-\
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I tried the KGB Archiever also, but it is taking long time............................... ;D
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It's a 3.20GB Nero Image file. As per your post :o I just downloaded and tested it (Mounted the .nrg image into nero image drive ) and I got the files.......
Try once... :-\
It's empty. Every single character in the extracted Image is ascii 0.
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It's empty. Every single character in the extracted Image is ascii 0.
Amazing...... :o what's happening ? while i got the files but you told it was written with 0's
I can't believe this ? why it was happening like that........................... ??? ??? ???
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You are obviously doing something wrong. Especially if you are seeing compression ratios that are that high. It's just not possible to compress them that much.
<edit> Are you sure that you aren't just compressing the links to the files? </edit>
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No no no man....... they are files, I uncompressed and installed MSOffice 2003. But I don't know what happened when you uncompressed them. It's working on my desktop as well as on my notebook. I verified once again.....
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I don't think that you did what you think that you did.
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I compressed them, and still i'm using them........
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you can't use a compressed file.... unless they are compressed via the NTFS filesystem feature.
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what i was did is here....
1)I downloaded winrar version 3.80
2)I copied the contents of my xp os into a folder
3)I copied MSOffice, Nero, VLC and some other files into the same folder where i put the windows.
4) Now using Nero 7 i make an image file of these
5) then I compressed that image file, and it came to 2MB
I gave it to my friends and they told it's working....
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And you say that it went from what size before compression to what size after compression?
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Before compression 3.4GB
After compression 2MB
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Not possible i say.
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No, that's positively unheard of.
Even 3.4 Gig to 2 Gig would be absolutely astounding.
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Wonder why the compressed files are empty ? ?
::)
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what i was did is here....
1)I downloaded winrar version 3.80
2)I copied the contents of my xp os into a folder
3)I copied MSOffice, Nero, VLC and some other files into the same folder where i put the windows.
4) Now using Nero 7 i make an image file of these
5) then I compressed that image file, and it came to 2MB
I gave it to my friends and they told it's working....
So we add piracy to the charge of falsehood...
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Why would it work for them and not the Expert ...one wonders ? ?
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I just double-checked what I saw in the file with the following routine:
Public Sub CheckBytes(Byval onFile as String)
Dim StreamOfFile as BCFile.FileStream
Dim StringRead as String,CountMismatch as Long
Set StreamOfFile = BCFile.OpenStream(onfile)
Do Until StreamOfFile.AtEndOfStream
StringRead = StreamofFile.ReadString(32768,strRead_ANSI)
if StrComp(Stringread,String$(len(stringread),vbnullchar)) <> 0 then
debug.Print "Compare mismatch"
countmismatch = countmismatch+1
End If
Loop
StreamOfFile.CloseStream()
debug.print "number of 32K blocks that contain non-null characters:" & countmismatch
End Sub
I ran it on the extracted image. the result was that there were 0 32K blocks containing non-null characters.
This is not a valid image, and the only reason it is 20MB in size is because the entire thing is just one character repeated billions of times. In fact, 20MB is far more then would be necessary, the only thing you'd need to compress this file is a Unsigned long integer to store the number of bytes, so it could be reduced to only 8 bytes.
Wondering why it worked for your friends is irrelevant. Because it did not. There is not "it probably didn't work" or even an inkling of a possibility that it worked. saying it worked is analogous to saying you were able to turn a cooked egg into a raw egg again.
lastly, what exactly are you copying? your explanation is not clear. you copied the contents of your XP OS? Is this the CD, your windows directory, or what? same with the other entries. copying your program files folder is pointless and even if you had a valid archive from that it would be completely useless. And larger then 20MB.
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Well done BC, I knew it was bunk.
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astly, what exactly are you copying? your explanation is not clear. you copied the contents of your XP OS? Is this the CD, your windows directory, or what?
I put the cd in the tray and copied the entire contents into a folder. It's not programfiles. I'l upload the video of what i did.....soon.
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You do realize that a video of what you did won't add any credibility to what you claim. What you are claiming is just not possible, no matter how you say or view it.
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Ok, no problem.... 8)