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Why is this shot strobing?


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#1 Nitai Lev Oren

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Posted 17 May 2016 - 07:24 AM

the other day I shot a corporate video

and here is a sample:

 

and I saw on the screen there is minimal strobing. (look at the guy shirt long enough)

shot on 60D f2.8 Shutter 50 24FPS

there were 3 open face light in the scene.

the rule of thumb is: that the shutter suppose to be X2 of the frame rate right? but if I shot on 24FPS the shutter needs to be 48 and so I shot it on shutter 50

so I don't see what is the problem


Edited by Nitai Lev Oren, 17 May 2016 - 07:32 AM.

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#2 timHealy

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Posted 17 May 2016 - 09:12 AM

With video compression I see something but not sure what I am seeing. Could it be Moire pattern of the fabric?

 

Best

 

Tim


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#3 Nitai Lev Oren

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Posted 17 May 2016 - 09:24 AM

no it's not moire, I solved the problem it was small led light on the back I forgot it made it strobe.

but another question is how do I had to light them in order they will be separate from the background?


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#4 timHealy

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Posted 17 May 2016 - 09:40 AM

no it's not moire, I solved the problem it was small led light on the back I forgot it made it strobe.

but another question is how do I had to light them in order they will be separate from the background?

 

 

Backlight or Production design. See how the woman is separate from the background? Her dark hair against a lighter backdrop? Not so much for the background behind the guy.

 

Other wise use a light. In this case I would use something soft and wide to cover the two. A chimera, a half dome, a westcott. A 4 foot kino with diffusion and all with and egg crate. Something like that.

 

Best

 

Tim


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#5 Nitai Lev Oren

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Posted 17 May 2016 - 10:27 AM

and the front light is not bright what should I've done to brighten them a little more?

 

p.s: when do you use egg crates and why?


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