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Old November 28th, 2011, 06:25 AM   #1
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strobing issues with 24p footage

I have some 1080 24p footage with fairly slow pans that still strobe more than I would expect. Are there some settings I should consider to minimize this strobing issue?

I've encoded at low, med & hi bit rates, tried 29.97 (worse) and a few other tricks that didn't help.
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Old November 28th, 2011, 02:54 PM   #2
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Re: strobing issues with 24p footage

A slower shutter speed may help.
It's a tradeoff b/t motion blur and stutter.
I think it's really difficult to do 24p shots that involve much camera motion.
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Old November 28th, 2011, 03:52 PM   #3
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Re: strobing issues with 24p footage

Robert's correct. Inexpensive cameras have too much edge detail and too little fine detail (from low MTF and low resolution). Thus the edges are way too sharp and you see them and thus see the natural edge judder from 24p.

If you dial down Sharpness, you do reduce edges but you also reduce fine detail -- a nasty catch 22.

For more detail, go to DVC and look for the Broadcast Engineering story on 24p.
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Old November 28th, 2011, 06:04 PM   #4
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Re: strobing issues with 24p footage

I posted this in the Adobe forum to look for post solutions, got any?

Thanks
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Old November 28th, 2011, 08:19 PM   #5
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Re: strobing issues with 24p footage

Reduce contrast by using gamma because edges are most easily seen when contrast is high. I suppose reducing saturation might help too -- if your edges have bright color.
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Old November 29th, 2011, 04:20 AM   #6
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Re: strobing issues with 24p footage

Or you can move the footage to a compositing software like Nuke or Fusion and use optical flow/motion blur to create artificial motion blur. Not the cheapest or time-saving solution though.
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