start_screen_record: Start Screen Recording

In muschellij2/recordscreen: Record Screen

Description

Start Screen Recording

Usage

start_screen_record(device = guess_recording_device(),
  outfile = tempfile(fileext = ".avi"), duration = NULL, args = NULL,
  video_number = 1, audio_number = 1, overwrite = TRUE,
  audio = FALSE, video = TRUE, run = TRUE, verbose = FALSE)

Arguments

device	Device to record on
outfile	Output filename (with extension)
duration	record for a fixed duration, passed to the args, in seconds
args	additional arguments to pass to ffmpeg
video_number	number of video device
audio_number	number of audio device
overwrite	Should output file be overwritten if it exists?
audio	Should audio be captured
video	Should video be captured
run	Should the code be run (default TRUE) or simply have the arguments printed (FALSE)
verbose	print diagnostic messages

Value

A list of the process ID and output file.

Note

https://trac.ffmpeg.org/wiki/Capture/Desktop

Examples

res = Sys.which("ffmpeg")
stopifnot(res != "")
print(list_output_devices())
tempdir(check = TRUE)
start_screen_record(run = FALSE)
out = start_screen_record(audio = FALSE)
out
Sys.sleep(4)
out
res = end_screen_record(out)
stopifnot(file.exists(out$outfile))

out = start_screen_record(audio = TRUE, verbose = 2)
out
Sys.sleep(4)
out
res = end_screen_record(out)
stopifnot(file.exists(out$outfile))

out = start_screen_record(audio = TRUE, video = FALSE,
outfile = tempfile(fileext = ".mp3"), verbose = 2)
out
Sys.sleep(4)
out
res = end_screen_record(out)
stopifnot(file.exists(out$outfile))
mp3 = tuneR::readMP3(out$outfile)
range(mp3@left)

out = start_screen_record(audio = FALSE,
outfile = tempfile(fileext = ".gif"))
out
Sys.sleep(4)
res = end_screen_record(out)
stopifnot(file.exists(out$outfile))

muschellij2/recordscreen documentation built on May 21, 2019, 1:45 p.m.