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

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