Webcam timelapse with Ubuntu Cheese

I found a simple way to take time lapse photos with Ubuntu’s webcam utility Cheese.

I created a macro using Xmacro.  Very helpful info I found on A Search For Truth.  The key bits I learned was a trick for installing.  Instead of the add/remove utility for Ubuntu, the Synaptic Package utility will install xmacro for you.  (click on Systems > Administration > Synaptic).

Once installed, I created a text file called timelapse.macro that contained:

ButtonPress 1

ButtonRelease 1

Repeated as many times as I wanted to take photos.  At 30 frames per second, 1800 photos will take one minute.  The file will be 3600 lines long.

I put the text file in my desktop directory.  Opened a terminal, went to that directory, then entered:

cat timelapse.macro | xmacroplay -d 5000 :0

This clicked on the mouse in workspace 0 every 5 seconds (5000 milliseconds) and released every 5 seconds.  Thus, a picture was taken every 10 seconds once I placed the mouse pointer on the take a photo button (Cheese was already up and running) on workspace 0. I think the workspace setting might only be set once, as I manually switched workspaces and the mouse clicks then were still automated wherever I worked.

One downside, I haven’t yet figured out how to stop the macro early.  cntl-alt-backspace did it the hard way, but I’m sure there is an easier way I haven’t found yet.  Still, with Linux, this warm reset gets you back to your desktop in less than 10 seconds, so it is far less cumbersome than rebooting Windows.

       - the Muse

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5 Responses to “Webcam timelapse with Ubuntu Cheese”

  1. Zid Says:

    Hello!

    I was looking for something like this as well and found your solution.

    However i did a small change that IMHO works a little better:

    I did the same timelapse.macro as you.

    Then i made a script called tl:
    cat timelapse.macro | xmacroplay :0

    I run the script with watch:
    watch -n [how often in seconds you want a picure] ./tl

    now im no guru but its easier to vary the time and you dont need to zap to get out of the script, just select the terminal and press ctrl+c.

    Thanks for helping me come up with this :)

  2. Zid Says:

    yeah, and just one:

    ButtonPress 1

    ButtonRelease 1

    as the script restarts the macro, no worries that the macrofile will run out before you want to stop recording :)

  3. the Muse Says:

    Thanks for the improvements. I need to learn more about the power of scripts.

  4. Jim Says:

    Doesn’t Cheese’s burst mode do the same thing?

  5. the Muse Says:

    Great update. As far as I can tell, burst mode was added after I created the macro. Seems like a useful addition to Cheese though.

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