issue with snapshots from command line via gstreamer
tomeu at sugarlabs.org
Thu Jun 18 05:02:47 EDT 2009
On Wed, Jun 17, 2009 at 23:31, Richard A. Smith<richard at laptop.org> wrote:
> I'm using a small script to take snapshots with an OLPC every 30 seconds
> using a gstreamer command line.
> The wiki (http://wiki.laptop.org/go/Programming_the_camera) lists the
> following as one method of doing this.
> gst-launch-0.10 v4l2src ! ffmpegcolorspace ! pngenc ! filesink
> 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.
Maybe with a python script that uses the gstreamer bindings? You can
check the code of any of the activities that use the camera.
> Richard Smith <richard at laptop.org>
> One Laptop Per Child
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