4.20 Manipulate Markdown via Pandoc Lua filters (*).4.19 Put together all code in the appendix (*).4.18 Omit a heading in the table of contents.4.15.3 Other packages for making diagrams.4.14 Create an animation from multiple R plots.4.12 Preserve a large number of line breaks.4.11 Combine words into a comma-separated phrase.4.5.4 Include appendix after bibliography (*).4.5.3 Add all items to the bibliography.4.5.2 Add an item to a bibliography without using it.4.3 Access the document metadata in R code.3.2 Write Markdown in the RStudio visual editor.2.3 What can we change to change the results?.1.2 Install LaTeX (TinyTeX) for PDF reports.1.1 Use a Pandoc version not bundled with the RStudio IDE.If you’re interested in using Ari please get in touch! As always I love to see Our lectures through the Google Translate API and make videos in 20+ different Amazon Polly has voices for several languages, so theoretically we could run.Our videos are more accessible to folks with disabilities since all of the.Since video source files are just plain text, videos can be version controlled.Updating a video is as easy as changing a few lines of text.Ari has the potential to solve many of our video problems: That meant that every time an API for one of our favorite packagesĬhanged we would need to re-shoot and re-edit a video, which took up lots of Unfortunately videos are quite labor intensive to make, and in theĬase of technical videos APIs are always changing and new functions are being AsĪ result we wanted to create a ton of video content, which students oftenĪppreciate. Greatest data science technologies that we thought students should be using. We made new online courses at a rapid pace in order to popularize the latest, When I worked at the Johns Hopkins Data Science Lab Up AWS before running this command.) The capture_method argumentĪttempts to minimize the time it takes to create the video. You can see a list ofĪvailable voices by running aws.polly::list_voices() (make sure you’ve set Working directory, and you’ve made your first video! The voice argument aboveĭesignates which voice Polly uses to narrate the video. Let’s create a video from the built in example files: # First set up your Amazon credentials Sys.setenv ( "AWS_ACCESS_KEY_ID" = "EA6TDV7ASDE9TL2WI6RJ", "AWS_SECRET_ACCESS_KEY" = "OSnwITbMzcAwvHfYDEmk10khb3g82j04Wj8Va4AA", "AWS_DEFAULT_REGION" = "us-east-2" ) # Use this Rmd file to create the slides rmd_file <- ari_example ( "ari_comments.Rmd" ) # Normally you would create this HTML file using rmarkdown::render() html_file <- ari_example ( "ari_intro.html" ) ari_narrate ( rmd_file, html_file, voice = "Joey", capture_method = "iterative" )Īfter several seconds a video file called output.mp4 should appear in your ![]() Now you’re ready to make a video! First make sure you have your AmazonĬredentials set up, then use ari_narrate() in order to produce the video. You should render() the HTML version of your presentation using the rmarkdown Once you’ve written narration for each slide This allows you to write narration under the corresponding Rmd file above is written in a standard format, with theĮxception that narration for each slide is written in an HTML comment, The materials can be translated into other spoken and written languages.Īs you can see the. Quickly create a lecture from plain text. Let’s load Ari so we can take a look at a sample R Markdown presentation: library ( ari ) file.show ( ari_example ( "ari_comments.Rmd" )) ![]() Video just from an R Markdown slide presentation and some written narration. The main idea behind Ari is that you should be able to easily create a lecture Now that you’re all set up you can install Ari from CRAN: install.packages ( "ari" ) Let’s Make a Video You will need to pay whenever you use Polly.Īfter setting up your AWS account you’ll need to installįFmpeg, which Ari uses to create the video file. Keep in mind that Amazon Web Services has a free tier, but once it is exhausted First you’ll need to configureĪn Amazon Web Services account and link it to R so that Ari can useĪmazon Polly in order to narrate your videos. Start using Ari there is a little bit of setup. Ari makes it easy to create technical lecture videos that you want toĭistribute online by latching into your regular data science workflows.
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