timelapse.sh

# download imagesnap [http://iharder.sourceforge.net/current/macosx/imagesnap/]

# identify your video recording device
./imagesnap -l

# repeatedly take a snapshot
while :; do ./imagesnap -d "HD Pro Webcam C920" ~/Pictures/snapshots/`date +%H-%M-%S`.jpeg; sleep 58; done

# optional: resize 
# WARNING - will overrite your files
sips -Z 640 ./snapshots/*.jpeg

# create an animated .gif with imagemagick
brew install imagemagick
convert -delay 4 *.jpeg output.gif

# or a .mov file with tlassemble [https://github.com/dbridges/cocoa-tlassemble]
brew install tlassemble
tlassemble ./snapshots time_lapse.mov -fps 30 -height 720 -codec h264 -quality high