issue with snapshots from command line via gstreamer

Walter Bender walter.bender at
Fri Jun 19 09:20:57 EDT 2009

There had been a version of Record that did time-lapse. Maybe Erik
knows where it lives.


On Wed, Jun 17, 2009 at 5:31 PM, Richard A. Smith<richard at> wrote:
> I'm using a small script to take snapshots with an OLPC every 30 seconds
> using a gstreamer command line.
> The wiki ( lists the
> following as one method of doing this.
> gst-launch-0.10 v4l2src ! ffmpegcolorspace ! pngenc ! filesink
> location=foo.png
> However, this has a flaw because the camera is powered off when not in
> use.  When powered up the AGC circuit has to calibrate and that takes
> more time than the above allows.  You end up with pictures that have
> various funky types of brightness and white balance  issues.
> Anybody know if there is a way to make gstreamer take multiple snapshots
> and then just use the last one.
> --
> Richard Smith  <richard at>
> One Laptop Per Child
> _______________________________________________
> Devel mailing list
> Devel at

Walter Bender
Sugar Labs

More information about the Devel mailing list