load.video: Load a video using ffmpeg

In imager: Image Processing Library Based on 'CImg'

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

See Also

save.video, make.video

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 documentation built on May 29, 2024, 1:38 a.m.