Useful tool to manipulate pdfs. For example, extracting page 22-36 from a
pdf, can be done by typing
pdftk A=input_file.pdf cat A22-36 output output_file.pdf
Splitting a pdf file into one file for each page can be obtained by
pdftk file.pdf burst
For more cool stuff to do with pdftk, check out
this
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Create a info dictionary
pdftk new.pdf cat output new_w_info.pdf -
Get the metadata
pdftk old.pdf dump_data > in.info -
Edit the metadata
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Add the metadata (with the bookmarks)
pdftk new_w_info.pdf update_info in.info output all_works.pdf
See the answers at
http://superuser.com/questions/232553/how-to-change-internal-page-numbers-in-the-meta-data-of-a-pdf
qpdf -decrypt test.pdf editable.pdf
On Windows, Adobe Pro can perform the same features under tools -> permissions.
Note: that this deletes the chapter bookmarks, and can convert some pages to .png.