--- On Tue, 12/25/12, Rieni <[email protected]> wrote:
> Hello Sayed,
>
> Get rid of half of your 60 frames per second so that you end
> up with
> 30 frames per second and hope that with that, the flicker
> disappears.
> To get rid of every second frame you just need to convert to
> 30fps
> and don't use frame blending. Why did you shoot in 60fps by
> the way?
That'll only work if the video was shot in true 60 frames per second instead of
2x the NTSC 29.976 frames per second AND the AC power for the lights was rock
solid on 60 hertz.
With anything else there will be drift in the flicker, caused by the lights and
the video recording going in and out of synch.
Old or inexpensive fluorescent lights have poor or no filtering in their power
and control electronics so they have a 50 or 60 Hz flicker. The human eye and
brain of most people just filters it out with persistence of vision. The quite
slipshod frequency regulation of alternating current electricity everywhere
just makes the problem worse to deal with when recording video.
If you can't synch your camera to the local power, do a short test recording to
see if you get flicker. If you do, use a DC powered light or an AC powered
light with good filtering to try and fill in or overpower the flickering lights
on what you're shooting.
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