av (version 0.9.4)

av_video_images: Convert video to images

Description

Splits a video file in a set of image files. Default image format is jpeg which has good speed and compression. Use format = "png" for losless images.

Usage

av_video_images(
  video,
  destdir = tempfile(),
  format = "jpg",
  fps = NULL,
  trim = NULL
)

Arguments

video

an input video

destdir

directory where to save the png files

format

image format such as png or jpeg, must be available from av_encoders()

fps

sample rate of images. Use NULL to get all images.

trim

string value for ffmpeg trim filter for example "10:15" for seconds or "start_frame=100:end_frame=110" for frames.

Details

For large input videos you can set fps to sample only a limited number of images per second. This also works with fractions, for example fps = 0.2 will output one image for every 5 sec of video.

Examples

if (FALSE) {
curl::curl_download('https://jeroen.github.io/images/blackbear.mp4', 'blackbear.mp4')
av_video_images('blackbear.mp4', fps = 1, trim = "10:20")
}