Flicker, Flicker, Flicker!

G

Giganova

Well-known member
Filming a documentary with a D600 as the "A cam", and a D7000 as "B cam". The footage from both cameras shows some flicker during the first 1-2 sec after I start recording, nothing to really worry about as long as you know it and discard the first few seconds. However the D7000 has now started to flicker all the time. See for yourself:

https://vimeo.com/106934117

Camera was in fully manual mode:
- "Manual Movie Settings"
- Manual exposure Mode "M", exposure time set to 1/1000 sec
- ISO set to 100
- Nikon 50mm/1.4 AI-S lens with fixed aperture set to f/8
- Firmware A 1.02, B 1.02, C 1.002
  1. Any solution to this? (other than throwing the camera into the trash?) :(
  2. What software could de-flicker the footage?
Thanks!
 
Make sure auto ISO is disabled. Also, put an ND filter on your lens and shoot 1/50 shutter speed.
You could reinstall the firmware and see if that fixes the problem. Have you checked if exposure is consistent in photos?
 
yes, you should have shot at 1/50s shutter speed, see this: http://www.similaar.com/foto/tuten/630.html

but if the damage is done, you'll have to sort it out in post
there must be plugins to deal with that, it's a relatively common issue for people shooting timelapse with modern lenses (aperture is opened and closed in each actuation, and never ends in exactly the same spot)
 
De-flicker is a pretty common tool in compositors and top end finishing / grading systems, Mystika, Pablo, Flame, Nuke, Fusion, DS all have a tool for that, but there is a price to be paid.. generally the highlights go down to the lowest value and the shadows come up to the highest values making a pretty crappy looking picture, but at least it's a starting point to grade from, but you may find you will need to bring the shots around the flickering shot down to match it all, rather than expecting the de-flicker to magically make something out of nothing...

d
 
I had a bit of flickers on a shoot with the fs700 at 240fps. A little trick that helped get rid of it was to create a second layer of the same clip on top of the original. Offset the top layer by 1 frame and set the opacity down to about 40%. You can play with the various blending modes, but that should usually get rid of the flicker, so long as it isn't crazy much flickering. The image loses its sharpens though.

P.S. - Quite the tie the gentlemen is wearing ;)
 
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