qpdf {qpdf}

Split, Combine and Compress PDF Files

Description

Content-preserving transformations transformations of PDF files. Note qpdf does not read actual content from PDF files: to extract text and data you need the pdftools package.

Usage

pdf_split(input, output = NULL, password = "")

pdf_length(input, password = "")

pdf_subset(input, pages = 1, output = NULL, password = "")

pdf_combine(input, output = NULL, password = "")

pdf_compress(input, output = NULL, linearize = FALSE, password = "")

pdf_overlay_stamp(input, stamp, output = NULL, password = "")

pdf_rotate_pages(
  input,
  pages,
  angle = 90,
  relative = FALSE,
  output = NULL,
  password = ""
)

Arguments

input

path or url to the input pdf file

output

base path of the output file(s)

password

string with password to open pdf file

pages

a vector with page numbers to rotate

linearize

enable pdf linearization (streamable pdf)

stamp

pdf file of which the first page is overlayed into each page of input

angle

rotation angle in degrees (positive = clockwise)

relative

if TRUE, pages are rotated relative to their current orientation. If FALSE, rotation is absolute (0 = portrait, 90 = landscape, rotated 90 degrees clockwise from portrait)

Details

Currently the package provides the following wrappers:

• pdf_length: show the number of pages in a pdf

• pdf_split: split a single pdf into separate files, one for each page

• pdf_subset: create a new pdf with a subset of the input pages

• pdf_combine: join several pdf files into one

• pdf_compress: compress or linearize a pdf file

• pdf_rotate_pages: rotate selected pages

These functions do not modify the input file: they create new output file(s) and return the path(s) to these newly created files.

Examples

# extract some pages
pdf_file <- file.path(tempdir(), "output.pdf")
pdf_subset('https://cran.r-project.org/doc/manuals/r-release/R-intro.pdf',
  pages = 1:3, output = pdf_file)
pdf_length(pdf_file)
unlink(pdf_file)