timelapse.zsh

#! /bin/zsh
TIME=$1
FNAME=$2

# if [[ $# != 3]] then;
#   echo "USAGE: $0 time_interval filename"
#   exit 2
# fi
 
if [[ -f $FNAME ]]; then
  echo "filename taken!"
  exit 2
fi
 
a=0
while true
do
  sleep $TIME
  screencapture "$(pwd)/img${(l:6::0:)a}.png"
  ((a++))
  trap "ffmpeg -framerate 30 -i img%06d.png -c:v libx264 -r 30 -pix_fmt yuv420p $FNAME.mp4;break" 2
done
exit 0