The flicker is caused by the camera's shutter which steps down to very fast
times to compensate for high light levels. You can fix it by using an ND filter
or an aperture (F-stop) == black cardboard with small hole taped in front of the
lens. This will yield a grainy picture. Keep enlarging the hole until most of
the grain is gone. If you enlarge too much the flicker noise bars will return.

Imho resist the temptation to flash the camera(s). You could end up with an
expensive camera mockup. Sometimes some settings must be accessed via telnet or
such because someone clever forgot to put it in the web interface. Try to read
the manual carefully.

hope this helps,
Peter P.

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