extract text from pdf then remove unnecessary characters change '\n' into '||' change \f' into ' '

* - pdf

libreoffice --convert-to pdf *.ppt
libreoffice --headless --convert-to pdf *.ppt

readme

20130607

CONVERT
EXTRACT
CLEANUP

libreoffice --convert-to pdf *.ppt
pdf2txt - extracts text contents of PDF files 
pdftk
pdftk 1.pdf 2.pdf 3.pdf cat output merged.pdf
in alphabetical order: pdftk *.pdf cat output merged.pdf

clean up text

#!/bin/bash
for f in *.txt
do
  echo "Processing $f file... \"$f"
  tr '\n' '||' < "$f"  > "$f.temp"
  tr '\f' ' ' < "$f.temp"  > "$f.out"
  mv "$f.out" ./out
  rm "$f.temp"
  # take action on each file. $f store current file name
  # cat $f
done

pdf - text

#!/bin/bash
#FILES=./*.pdf	
#Processing ./20130604202323560.pdf file... "output./20130604202323560.pdf
#for f in $FILES
#Processing 20130604202323560.pdf file... "output20130604202323560.pdf
for f in *.pdf
do
  echo "Processing $f file... \"output$f.txt"
  pdf2txt -o "output$f.txt" $f
  # take action on each file. $f store current file name
  # cat $f
done

merge
pdftk *.pdf cat output merged.pdf

iText
http://itextpdf.com/itext.php
Java
C#

newer version pdf creator
remove optimization before processing

Uncompress PDF page streams for editing the PDF in a text editor (e.g., vim, emacs)
pdftk doc.pdf output doc.unc.pdf uncompress

http://www.pdflabs.com/docs/pdftk-cli-examples

not the solution

http://stackoverflow.com/questions/10772686/pdftk-and-qpdf-to-reset-pdf-commenting-security

The command qpdf --decrypt input.pdf output.pdf removes the 'owner' password. But it does only work, if there is no 'user' password set.

Once the owner password is removed, the output.pdf should already have unset all security protection and have allowed commenting. Needless to run your extra pdftk ... command then... BTW, your allow paramenter in your pdftk call will not work the way you quoted your command. The allow permissions will only be applied if you also...

...either specify an encryption strength
...or give a user or an owner password
Try the following to find out the detailed security settings of the file(s):

qpdf --show-encryption input.pdf
qpdf --show-encryption output.pdf

pdf2txt -o "merged.txt" merged.pdf

http://blog.chewearn.com/2008/12/18/rearrange-pdf-pages-with-pdftk/

rearrange order
rotate
append blank page

more tools
zoom
http://blog.davidron.com/2010/07/zooming-pdf-files-for-nook.html
pdfedit

more tools
zoom
http://blog.davidron.com/2010/07/zooming-pdf-files-for-nook.html
pdfedit

pdf 2 image (jpg/png) multiple pages
convert file.pdf result.png
-quality 100 -density 150