Video Noise Problem…

[Tudor “ted” jelescu]

what are you shooting with? What kind of lights are you using? What format (1080/720 25, 24 or 30 p or 50/60i)?

Tudor “Ted” Jelescu
Senior VFX Artist

[Stuart Samuels]

Hi Ted.

My bad, apologies. Here are the details:

Shot on DSLR – Canon 600D
Lighting – 800w Red Heads
1920 x 1080p at 24fps

I should also add that the clip has been quite heavily graded at this point. The roriginal aw clip has no visible issues.

Thanks

[Chris Brett]

Stuart

—- I know this is stating the obvious but if its easy to test this way I would be inclined to regrade another test section with the same technical settings but much less colour adjustment, say just lower the red slightly or some other minor tweak and see if this problem goes away — also work in the highest bpc available.

If the problem goes away it may be that too much picture info has been taken out to cope with the background.

If the problem persists check the technical specs.

—— chris brett // uk

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[Stuart Samuels]

Thanks for that Chris.

I’ll give it a try and will hopefully get to the bottom of the issue. I guess there’s only so far I can push my footage before I start running into these type of problems.

Thanks again.

Stuart

[Tudor “ted” jelescu]

Most likely a compression and grading issue.
What I learned that works best is to render the final ungraded pass to a uncompressed format, bring that in AE and grade in a 32bit comp, render uncompressed again and then use Encoder for delivery compression.
While the above does not add any extra quality to what is already there, for me it seems to work best.

Tudor “Ted” Jelescu
Senior VFX Artist

[Stuart Samuels]

Ah Ok. That sounds like a good idea. Could you suggest an uncompressed Codec I could use. I nearly always export ProRes442 and so don’t really have much experience with uncompressed codecs.

Much appreciated.

Stuart

[Tudor “ted” jelescu]

ProRes will work – 444 is best. For uncompressed- Animation – QT, PNG – QT, or TIFF sequence are just a few options.

Tudor “Ted” Jelescu
Senior VFX Artist

[Chris Brett]

— yes I’m very much with Ted on that one — never throw any picture information away until you really have to ….

— all the best ——-chris

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[Chris Wright]

if don’t want to throw any data away, edit in 16 or 32bpc so transitions/effects aren’t dithered/clamped. Then render out a master 4:4:4 in trillions of colors. If your original footage was noisy, use neatvideo or ae’s remove grain. I also noticed it was flickering, which means you might have a moire problem too.