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