imager: load.video – R documentation

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load.video

Load a video using ffmpeg

Description

You need to have ffmpeg on your path for this to work. This function uses ffmpeg to split the video into individual frames, which are then loaded as images and recombined. Videos are memory-intensive, and load.video performs a safety check before loading a video that would be larger than maxSize in memory (default 1GB)

Usage

load.video(
  fname,
  maxSize = 1,
  skip.to = 0,
  frames = NULL,
  fps = NULL,
  extra.args = "",
  verbose = FALSE
)

Arguments

`fname`	file to load
`maxSize`	max. allowed size in memory, in GB (default max 1GB).
`skip.to`	skip to a certain point in time (in sec., or "hh:mm::ss" format)
`frames`	number of frames to load (default NULL, all)
`fps`	frames per second (default NULL, determined automatically)
`extra.args`	extra arguments to be passed to ffmpeg (default "", none)
`verbose`	if TRUE, show ffmpeg output (default FALSE)

Value

an image with the extracted frames along the "z" coordinates

Author(s)

Simon Barthelme

Examples

fname <- system.file('extdata/tennis_sif.mpeg',package='imager')
##Not run
## load.video(fname) %>% play
## load.video(fname,fps=10) %>% play
## load.video(fname,skip=2) %>% play

imager

Image Processing Library Based on 'CImg'

v0.42.10

LGPL-3

Authors

Simon Barthelme [aut], David Tschumperle [ctb], Jan Wijffels [ctb], Haz Edine Assemlal [ctb], Shota Ochi [cre]

Initial release