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Video footage of computer monitor
Hi,
I’m producing a training video for my company that requires me to film a video monitor. Just like when you film a television, the video monitor has horizontal bars that run up and down it. I know this is not the same as the flicker of a still image or text, but I tried the Flicker Removal filter in both Premier and After Effects just in case. It didn’t work.
Can anyone tell me how I can correct this?
Thanks,
Adrianna
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4 Replies
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the easiest way i know of would be to re-shoot and adjust the shutter speed to match the a multiple of the refresh rate of the computer monitor. you should be able to see the phase issue in the view finder of the camera and as you make an adjustment to the shutter speed/angle then you should see it effect the phase on the computer monitor, so it doesn’t hvae to be mathmatical.
not knowing what is on the computer monitor, you may be able to use an effect like echo that can use information from a previous frame and composite it on the current frame. i would think a setting of one echo, and blending mode of maximum and the closest offset value that can cover the phase problem might work ok. however if there is much movement in your shot, echo will probably not give you what you are looking for (it will blend that too for a double image like effect).
Kevin Camp
Designer – KCPQ, KMYQ & KRCW -
Wow. That was too easy. I just did a test reshoot on my own flat panel in my office. It’s perfect!!
Thanks so much, Dave!!
Adrianna
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Yar, but I will add that you must keep a critical eye on the video levels. Turn off the auto iris and autofocus. Shoot from far enough away so you can use a medium telephoto. check the shot every now and then to make sure the camera hasn’t drifted off to one side.Try to figure out the hottest whites and blackest blacks n all of your screens and set your camera to those. You want every shot to have about the the same range of values.
Be sure you know what the white balance for the screen is! It’s probably set for daylight and your camera is probably set for tungsten.Give yourself plenty of shot handles and give yourself a microphone to do audio slates, talk to yourself a lot, keep a running patter. When you are editing, all screen shots look the same and the only thing that will make assembly easier is the audio slating.
bogiesan
This is my standard sigfile so do not take it personally: “For crying out loud, read the freakin’ manual.”
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Thanks for all the great advise. I did try working with echo. It helped some, but not enough.
Fortunately I got the answers on day one. I’ve already scheduled a reshoot of the footage we’re discussing. I have another shoot this afternoon. I’ll make the appropriate camera adjustments and work with a flat panel.
Thanks again.
Adrianna
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