make.video {imager}

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(s)

Simon Barthelme

See Also

load.video

Examples

## 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