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Re: Recording TV screen results in banding lines...

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Ryan Holmes
Re: Recording TV screen results in banding lines...
on Jun 15, 2015 at 9:18:25 pm

Yep...the glories of a rolling shutter. So basically you're struggling with a few things here:
(1) How the 70D records video with a rolling shutter, and
(2) The refresh rate of the monitor itself,
(3) The power grid that you're plugged into to power the monitor (depending on where you are in the world power runs at different frequencies - 50Hz in Europe, 60Hz in North America)

On your 70D what shutter speed are you shooting at? What frame rate are you recording to? What is the refresh rate of your monitor? I'll be honest, that it's very, very difficult to completely eliminate this from your recordings in camera. This is why TV shows and movies will typically do screen replacements for everything. So the image appears clear and without any refresh lines appearing. Many times this is a post vfx problem. Here's a good down and dirty trick from Philip Bloom that may work in your case:


Ryan Holmes
http://www.ryanholmes.me
@CutColorPost


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