make.video: Make/save a video using ffmpeg

Description

You need to have ffmpeg on your path for this to work. This function uses ffmpeg to combine individual frames into a video. save.video can be called directly with an image or image list as input. make.video takes as argument a directory that contains a sequence of images representing individual frames to be combined into a video.

Usage

make.video(
  dname,
  fname,
  pattern = "image-%d.png",
  fps = 25,
  extra.args = "",
  verbose = FALSE
)
save.video(im, fname, ...)

Arguments

dname: name of a directory containing individual files
fname: name of the output file. The format is determined automatically from the name (example "a.mpeg" will have MPEG format)
pattern: pattern of filename for frames (the default matches "image-1.png", "image-2.png", etc.. See ffmpeg documentation for more).
fps: frames per second (default 25)
extra.args: extra arguments to be passed to ffmpeg (default "", none)
verbose: if TRUE, show ffmpeg output (default FALSE)
im: an image or image list
...: extra arguments to save.video, passed on to make.video

Functions

save.video(): Save a video using ffmpeg

Author

Simon Barthelme

Examples

Run this code

## Not run
## iml <- map_il(seq(0,20,l=60),~ isoblur(boats,.))
## f <- tempfile(fileext=".avi")
## save.video(iml,f)
## load.video(f) %>% play
## #Making a video from a directory
## dd <- tempdir()
## for (i in 1:length(iml)) {
## png(sprintf("%s/image-%i.png",dd,i));
## plot(iml[[i]]); dev.off() }
## make.video(dd,f)
## load.video(f) %>% play