Originally Posted by michaaa62

You could "Ctrl + Shift + P" to take your screenshot whenever necessary.
Or install Imagemagick package and run import with store the image, from a script with sleep set to 300.

Code:

#! /bin/bash
 #file: screenshot.sh

while [ 1 -eq 1 ]; do
appenddate=_$(date '+%d%b%y-%H%M%S')
 import -window root ~/screenshot$appenddate.png
 sleep 300
 done

Big Fat Warning!!!This will save to /home/user! Be aware of running out of space for to many pictures

Originally Posted by michaaa62

Code:

while [ 1 -eq 1 ]; do

Originally Posted by sulu

One can write that while condition much shorter:

Code:

while [ 1 ]; do

Since the brackets might be a pita on the N900's keyboard another option would be:

Code:

while true; do

Edit:
btw: If you chose a date format like '+%F_%X' your files will automatically be sorted the correct way without explicitly sorting by time.

Originally Posted by nicolai

Another way, using gstreamer:
gst-launch-0.10 ximagesrc ! video/x-raw-rgb,framerate=1/10 ! ffmpegcolorspace ! pngenc snapshot=false ! multifilesink location="frame%05d.png"

This creates png images every 10 seconds with the name
frame00000.png frame00001.png ....

Or with timestamp on top of each frame:
gst-launch-0.10 ximagesrc ! video/x-raw-rgb,framerate=1/10 ! ffmpegcolorspace ! cairotimeoverlay ! ffmpegcolorspace ! pngenc snapshot=false ! multifilesink location="frame%05d.png"

I am no expert on creating movies from images, but this should work
ffmpeg -r 1/2 -i frame%05d.png -r 24 -b 1M timelapse.mpg

where the "-r 1/2" option defines the used input framerate.That way
your 1 per 10 seconds image will be rendered as 1 per 2 seconds, like a time lapsed movie.