Ok, so the pipeline is currently running at its native framerate and 640x480 resolution (only the middle of which is used for the scanning/display to allow the user to hold the barcode further from the camera).

Therefore there's probably not much I can fix here re. strobing effects. Are these effects severe? I've not really noticed anything.

I guess improvements to the gst elements might yield better performance still if anyone wants to take a crack at them.