Information on compression ratio

bordelais78 Posted messages 2 Status Membre -  
bordelais78 Posted messages 2 Status Membre -
Hello, I have to submit an assignment asking for various manipulations regarding archiving and creating *.zip files, etc...
I would like to know two things: how can we obtain information about the compression rate of a file as well as the space gained between the normal file and the compressed one? (simple subtraction?)
In addition, I am asked to convert into .zip, .tar, and .cab. I managed to compress with the first two extensions using Keka, but I can't find any software to compress into .cab...
Thanks :)

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1 answer

_Ritchi_ Posted messages 21350 Registration date   Status Contributor Last intervention   6 114
 
Hello, I have to submit an assignment asking for various manipulations regarding archiving and creating *.zip files, etc...
I would like to know two things: how can we obtain information about the compression rate of a file as well as the space gained between the normal file and the compressed one? (simple subtraction?)
In addition, I am asked to convert into .zip, .tar, and .cab. I managed to compress with the first two extensions using Keka, but I can't find any software to compress into .cab...
Thanks :)

Configuration: Mac OS X Mountain Lion (10.8.2) / Safari 6.0.2
1
bordelais78 Posted messages 2 Status Member
 
Hello, I have to submit an assignment asking for various manipulations regarding archiving and creating *.zip files, etc...
I would like to know two things: how can we obtain information about the compression rate of a file as well as the space gained between the normal file and the compressed one? (simple subtraction?)
In addition, I am asked to convert into .zip, .tar, and .cab. I managed to compress with the first two extensions using Keka, but I can't find any software to compress into .cab...
Thanks :)



Configuration: Mac OS X Mountain Lion (10.8.2) / Safari 6.0.2
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