qpdf {animation}R Documentation

A wrapper for the PDF toolkit qpdf

Description

If the tool qpdf is available in the system, it will be called to manipulate the PDF files (especially to compress the PDF files).

Usage

qpdf(input, output, options = "--stream-data=compress")

Arguments

input

the path of the input PDF file

output

the path of the output (if missing, output will be the same as input)

options

options for qpdf (default to be '--stream-data=compress', i.e. compress the PDF files)

Details

This is a wrapper to call qpdf. The path of qpdf should be set via ani.options(qpdf = 'path/to/qpdf').

See the reference for detailed usage of qpdf.

Value

if ani.options('qpdf') is non-NULL, then this function returns the status of the operation (0 for success; see system); otherwise a warning will be issued

Author(s)

Yihui Xie

References

http://qpdf.sourceforge.net/

Examples

pdf("huge-plot.pdf")
plot(rnorm(50000))
dev.off()

## Windows
ani.options(qpdf = "D:/Installer/qpdf/bin/qpdf.exe")
qpdf("huge-plot.pdf", output = "huge-plot0.pdf")

## Linux
ani.options(qpdf = "qpdf")
qpdf("huge-plot.pdf", output = "huge-plot1.pdf")

ani.options(qpdf = NULL)

file.info(c("huge-plot.pdf", "huge-plot0.pdf", "huge-plot1.pdf"))["size"]
[Package animation version 2.3 Index]