dslreports logo
site
 
    All Forums Hot Topics Gallery
spc

spacer




how-to block ads


Search Topic:
uniqs
314
share rss forum feed


obeythelaw
Premium
join:2003-04-16
Bayonne, NJ

what does the "Compress" contextual option do?

I had a large PDF file and I couldn't sent it by email unless I scanned it into about 3 or 4 parts. I right clicked the file and hit Compress and it "zipped" the file but the size of the file is just as large as the original. What gives?


Daemon
Premium
join:2003-06-29
Berkeley, CA
Reviews:
·Comcast
·webpass.net

Re: what does the "Compress" contextual option do?

If the PDF was scanned as JPG images placed into a PDF, then the JPGs are already compressed and zipping them isn't going to compress them any further.

Same is true with things like mp3s and other compressed formats.

edit:PDFs may also be inherently compressed too, which means that no PDF would benefit from zipping. I'm not sure either way on that, though.
--
-Ryan
I use Linux, OS X, iOS and Windows. Let the OS wars die.


kitsune

join:2001-11-26
Sacramento, CA
reply to obeythelaw

However, if you just save them as pictures instead (jpg). Then when you attach them to an email in the mail application it will give you the option to change the size right in the email.



pike
Premium,MVM
join:2001-02-01
Washington, DC
kudos:3
reply to obeythelaw

PDF files are already compressed by default, using either the LZW or Flate algorithm.