flicker rate & stabilizer

[sb]

It's called Clear Scan, and it's built into some cameras. There are also 3rd
party devices to attach. One was made by J-Lab and had a small box that you
used to raise or lower the shutter speed to match the computer monitor.

If you don't have a camera that can do it you should either shoot the video
on an LCD or run it through a scan converter and record it.

 sb

On 1/10/04 3:33 PM, "Colin McDonald" <cmmcdonald at mac.com> wrote:

> 
> On Saturday, Jan 10, 2004, at 19:11 Europe/London, Mark M. Florida
> wrote:
> 
>> On Jan 10, 2004, at 1:01 PM, Brett Koonce wrote:
>> 
>>> It's an old film trick, synching gates.  Nowadays, there's an easier
>>> trick: just find a LCD monitor to film.
>> 
>> Or use 60 Hz -- not very good to look at first-hand, but should
>> transfer well to video (NTSC, right?).  If your shooting PAL, maybe 75
>> Hz?  Or you could adjust the frame rate of your camera to as close of
>> an even multiple of your scan rate as possible -- like set your
>> computer to 60 Hz and your camera to 1/30 sec.
> 
> I remember watching a television shoot in a set with a prominent
> computer monitor. The camera operators synced their cameras together
> and then varied the sync signal a wee bit up and down until the flicker
> and lines disappeared from the image of the monitor.
> 
> Just because the frame rate equalled the flicker rate (unlikely anyway)
> would not necessarily give a clean image - you might just as easily get
> a fixed black line or other lines.  There's more to it that that.
> 
> There must be someone on the list with studio experience of this kind
> of issue.
> 
> Colin McDonald