Correcting for monitor flicker on video cameras

MacMaster

macrumors 6502
Original poster
Jul 17, 2002
387
1
How do you do this? To get it so the picture shows no flashes when you look at a CRT monitor...What must I do...It's pretty urgent. If you need more info just ask!
 

MacMaster

macrumors 6502
Original poster
Jul 17, 2002
387
1
btw...if it's possible I'd also like to fix this on a digital camera...The video camera is a Cannon ZR10 and the Digital camera is a Kodak DC280...if that helps...It's for a movie I'm making(in imovie...);)
 

teabgs

macrumors 68030
Jan 18, 2002
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you have to use a special filter in order to get rid of the flicker....I forget what its called, but that's what you need. I don't remember, but I think it might be a bit costly...
 

MacMaster

macrumors 6502
Original poster
Jul 17, 2002
387
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Originally posted by teabgs
you have to use a special filter in order to get rid of the flicker....I forget what its called, but that's what you need. I don't remember, but I think it might be a bit costly...
Oh well...I guess I'll have to deal with it...
It will look "real":D ;)

Thanks!:)
 

teabgs

macrumors 68030
Jan 18, 2002
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behind you
Originally posted by MacMaster

Oh well...I guess I'll have to deal with it...
It will look "real":D ;)

Thanks!:)
hey, np.....if you have access to an LCD use that....or dont show the monitor..


Good luck.
 

MacMaster

macrumors 6502
Original poster
Jul 17, 2002
387
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Originally posted by teabgs


hey, np.....if you have access to an LCD use that....or dont show the monitor..


Good luck.
Nah...the only LCD's I have are "connected" to an imac and ibook...If I decide I have to show the CRT I'll use the digital camera and make it a kind of "time lapse(sp?)" effect. The flicker is pretty much unnoticeable on the dc...wierd!:rolleyes:
 

Classic

macrumors regular
Jul 9, 2001
211
0
No special fileter required

Just set your refresh rate on your CRT monitor to 60Hz. That's the same frequency as the NTSC standard. (PAL is 50 Hz.)

That is why your lights don't flicker, because they are the same frequency. However, if yoyu take an NTSC camera to Europe or a PAL camera to the US, and start taping video, you'll notice a slight flicker in the lights.
 

MacBram

macrumors regular
Jan 28, 2002
132
28
Zeeland, Nederland
monitor flicker on video

Just set your refresh rate on your CRT monitor to 60Hz. That's the same frequency as the NTSC standard. (PAL is 50 Hz.)

That is why your lights don't flicker, because they are the same frequency. However, if yoyu take an NTSC camera to Europe or a PAL camera to the US, and start taping video, you'll notice a slight flicker in the lights.
Yes. This is related to the fact that NTSC is 30 frames per second and PAL is 25 fps. Reset your refresh rate as Classic suggested and play around with shutter speed settings in multiples thereof. Changing shutter speed might help with digital stills, too.

This eliminates the flicker for me. You won't need any special filters or anything.

Rip
 

drastik

macrumors 6502a
Apr 10, 2002
978
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Nashvegas
adjusting the frequency on your monitor is definitely the way to go. I think there are some filters out there, but they aren't that hot at it, and I'm not sure there is one for iMovie. If you have some maual control on your camera, adjust the shutterspeed to get what you want perfect. Messig wiht the manual controls is going to give you the best video anyway, beware the wuomatic modes.;)
 

mnkeybsness

macrumors 68030
Jun 25, 2001
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Moneyapolis, Minnesota
or else you could do things the hard way and put a bright green sheet or piece of paper over the monitor and add something in after you chroma key the scene in adobe premiere or final cut pro...ha ha ha...we did that once...it turned out to be a lot of work because of the weird angles.
 

MacMaster

macrumors 6502
Original poster
Jul 17, 2002
387
1
Ok, changing the refresh rate sounds good...but how do you do that manually?:confused: