Winrar compression

[eviljoker]

how do i compress a file into something very smaller?
best i could shave off was 2 mb of a 66mb file.
and 20mb of a 174mb file.

 

[tw1164]

what kind of file are you compressing?

 

[mattsaccount]

WinRAR uses modern compression algorithms (much better than ZIP). It can't do magic--your results may be just about all that's possible. If you want, you might try a different program like 7Zip.

 

[screw3d]

The kind of files you are compressing makes a lot of difference. Files like JPEGs or MP3s or WMVs are already compressed.. you won't see a lot of difference by RARing them..

 

[eviljoker]

trying to compress some iso. and avis'

 

[Kyteland]

As mentioned, it totally depends on the file you are trying to compress. I just compressed a 152 MB text file that only contains numbers and spaces in to a 7 MB zip file, ~20:1 compression. You aren't going to get that kind of compression from most files, espesially those that have already been compressed in some way. For instance, you aren't going to get much, if any, size reduction compressing an mp3.

 

[Lonyo]

You can change the level of compression with WinRAR, but it takes longer to compress the files. Normally it's set at the middle setting, but it can be set for better compression or for faster compression.

 

[eviljoker]

well, how did u compress ur file down to 7mp frm a 152mb file?
can u guide me?

 

[bsobel]

Originally posted by: eviljoker
well, how did u compress ur file down to 7mp frm a 152mb file?
can u guide me?

He already answered your question. The ability to compress a file is highly based on what it is your compressing. In your case, your compressing files already compressed by another method. In his case he's compressing an uncompressed data stream. Based on the logic your showing, you should be able to run rar multiple times and make the file smaller each iteration until it's eventually 1 byte.

Bill

 

[bob4432]

Originally posted by: eviljoker
well, how did u compress ur file down to 7mp frm a 152mb file?
can u guide me?

it is because it was a text file that had numbers and spaces. isos and avis are not going to compress much. like others have stated, different files compress at different rates. i have used rar for about, damn, nearly 10 years and isos usually don't compress much even if the compression is on the highest, which is what i always use.

you will not get the kind of results that kyteland did with a iso/avi file.