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Render slides as an MP4 video file.

Source: R/mp4.R
to_mp4.Rd

Render slides as an MP4 video file. The function renders to the pdf, converts each slide in the pdf to a png, and then converts the deck of png files to a MP4 video file.

Usage

to_mp4(
  from,
  to = NULL,
  density = 100,
  slides = "all",
  fps = 1,
  complex_slides = FALSE,
  partial_slides = FALSE,
  delay = 1,
  keep_intermediates = FALSE
)

Arguments

from

Path to an .Rmd, .qmd, .html, .pdf file, or a URL. If from is a URL to slides on a website, you must provide the full URL ending in ".html".

to

Name of the output .mp4 file.

density

Resolution of the resulting PNGs in each slide file. Defaults to 100.

slides

A numeric or integer vector of the slide number(s) to include in the mp4, or one of "all", "first", or "last". Negative integers select which slides not to include. Defaults to "all", in which case all slides are included.

fps

Frames per second of the resulting .mp4 file.

complex_slides

For "complex" slides (e.g. slides with panelsets or other html widgets or advanced features), set complex_slides = TRUE. Defaults to FALSE. This will use the chromote package to iterate through the slides at a pace set by the delay argument. Requires a local installation of Chrome.

partial_slides

Should partial (continuation) slides be included in the output? If FALSE, the default, only the complete slide is included in the PDF.

delay

Seconds of delay between advancing to and printing a new slide. Only used if complex_slides = TRUE or partial_slides = TRUE.

keep_intermediates

Should we keep the intermediate files used to render the final output? The default is FALSE.

Value

Slides are rendered as an .mp4 file.

Examples

with_example("slides.Rmd", requires_chrome = TRUE, requires_packages = "av", {
    # Render mp4 from Rmd, html, pdf, or direct URL
    to_mp4("slides.Rmd")
})
#> ℹ Rendering slides.Rmd into renderthis_3a1b1c914263.html
#> ✔ Rendering slides.Rmd into renderthis_3a1b1c914263.html ... done
#> 
#> ℹ Rendering renderthis_3a1b1c914263.html into renderthis_3a1b5bceaa11.pdf
#> ✔ Rendering renderthis_3a1b1c914263.html into renderthis_3a1b5bceaa11.pdf ... d…
#> 
#> ℹ Removed temporary renderthis_3a1b1c914263.html
#> ℹ Rendering renderthis_3a1b5bceaa11.pdf into slides.mp4
#> ✔ Rendering renderthis_3a1b5bceaa11.pdf into slides.mp4 ... done
#> 
#> ℹ Removed temporary renderthis_3a1b5bceaa11.pdf