Ah.  You are running at 60 fps?  You can do a simple toggle to only render the video every other frame using a simple [spigot] and counter.  Just setting a simple motion or not state is best done at a much lower rate otherwise you have to filter the results anyway. 


On Tue, Apr 5, 2011 at 10:47 AM, Matteo Sisti Sette <matteosistisette@gmail.com> wrote:
On 04/05/2011 04:33 PM, chris clepper wrote:
I used pix_movement and blob for basic motion detection for years.  I
gated the video signal so it would only output every half second or
second

How do you gate the video signal? That may be exactly the workaround I need



Try setting the GEM framerate to the
advertised frame rate of your device and see if that helps.

Yes it does help, it fixes the problem completely. But that is not an option if i need to produce graphical output at a higher framerate. It's ok to detect the movement at a rate equal to or lower than the camera frame rate, but i can't lower the whole gem framerate because that will affect video output.