Changing Compression Ratio of Compressed Zip files

[Guest]

I'm trying to archive some old files to zip files, and was wondering if it
was possible to change the compression ratio for zipped files.

I have a group of .pdf files that total 390k uncompressed. I right click
the files, select send to, then compressed zip folder. The resulting zip
file is still 390k.

I know that ntfs compressed folders in windows 2000 report the uncompressed
size, not the compressed size.

My quesiton is, are zip folders the same in xp (reporting uncompressed size,
not compressed size), or should I be doing something to increase the
compression ratio?

 

[Guest]

pdf's are already
compressed. that
is what they were
designed to be when
sending them over
the internet.

maybe you might be able
to squeeze them down
another 10 percent with
this:

http://zipcentral.iscool.net/

--

<)))º>·´¯`·.¸. , . .·´¯`·.. ><)))º>`·.¸¸.·´¯`·.¸.·´¯`·...¸><)))º>

..

 

[VanguardLH]

I'm trying to archive some old files to zip files, and was wondering
if it
was possible to change the compression ratio for zipped files.

I have a group of .pdf files that total 390k uncompressed. I right
click
the files, select send to, then compressed zip folder. The
resulting zip
file is still 390k.

I know that ntfs compressed folders in windows 2000 report the
uncompressed
size, not the compressed size.

My quesiton is, are zip folders the same in xp (reporting
uncompressed size,
not compressed size), or should I be doing something to increase the
compression ratio?

PDFs are not very compressible, just like images are not very
compressible (compression for images involves lossy compression which
means losing some of its content). Just because you see text in the
Adobe Reader doesn't mean that the file is text.

You will need a 3rd party file archive/compression program to let you
select the level of compression. 7-zip is free. Using a sample .pdf
file, 7-zip at max compression reduced the .pdf from 718MB to 600MB.
Not a lot but some.

 

[Guest]

Thanks everyone. I didn't realize that .pdf's were already compressed.