screenlapse

No frills NodeJS based timelapse screen recording CLI util, largely thanks to screenshot-desktop. Records screenshots as image sequence w/ configurable interval.

git clone https://github.com/postspectacular/screenlapse

cd screenlapse
yarn install

# start recording, ctrl+c to stop
./screenlapse.js <delay> <startframe>

All args are optional, but must be given in this order:

• <delay> - number of milliseconds between each recorded frame (default: 500)
• <startframe> - start frame number (default: 0)

Editing the image sequence

Since each recorded frame is stored as separate JPG file, removing unwanted frames is easy. However, the missing frames cause the image sequence to be interrupted in terms of consecutive numbering and ffmpeg will stop encoding at the first gap. To avoid this, use the included batch-rename bash script to rename / renumber all images like that:

./batch-rename *.jpg

Build mp4

ffmpeg -r 12 -i '%04d.jpg' -vf scale=1920:-1 -movflags faststart -c:v libx264 -preset slow -crf 18 -y recording.mp4

License

© 2019 - 2023 Karsten Schmidt // Apache License Version 2.0