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Windows 7: compressing (zip) files dosnt do much

18 Aug 2010   #1
lothaer

Windows 7 Home Premium
 
 
compressing (zip) files dosnt do much

for some reason when i try to compress some files to send over the internet the .zip file isnt much smaller than the files on their own.

the files on their own are 25MB

the compressed file is only 24.8MB

a saving if 200kb is not really worth it.

is there anyway I can make it a lot smaller?


My System SpecsSystem Spec
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18 Aug 2010   #2
johndh

Windows 7 (64bit)
 
 

What are the file types?

I often see compressed (zipped) jpeg files that are more or less the same size as the un-zipped file. Reason = Its because they are already compressed.
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18 Aug 2010   #3
Orbital Shark

 
 

Hi lothear, welcome to the forums

There are many files that are already in a compressed format, for example JPG or MPEG/AVI or MP3 files.

You'll find This link quite interesting.

Hope it helps


OS
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18 Aug 2010   #4
lothaer

Windows 7 Home Premium
 
 

yeah they are .jpg files i was hoping to get them under 10MB.

Orbital Shark: thanks for the link how do i get to those options when using the default windows compression tool? or should i go get winzip again?
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18 Aug 2010   #5
Orbital Shark

 
 

JPG files are already highly compressed mate, you'll need to create seperate archives (10mb each) if you wish to email them
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18 Aug 2010   #6
Dwarf

Windows 8.1 Pro RTM x64
 
 

You cannot successfully compress files if they are already compressed, as is the case with .jpg files. The saving on such files, if any, will be negligible. In some cases, the result of the compression will be a file that is larger than the original due to the necessary overheads incurred (the information on how to decompress the file needs to be included).
My System SpecsSystem Spec
18 Aug 2010   #7
johndh

Windows 7 (64bit)
 
 

Quote   Quote: Originally Posted by lothaer View Post
yeah they are .jpg files i was hoping to get them under 10MB.

Orbital Shark: thanks for the link how do i get to those options when using the default windows compression tool? or should i go get winzip again?
Options for jpeg compression is usually found in you image editor. Are you using one? Tell us a bit more about your work flow, what apps, camera etc you are using.
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 compressing (zip) files dosnt do much




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