Topic: Remove flicker?

Simple question: is there a way to successfully remove flicker? I've made a bit of a check-up on my current film...

mini/lol

mini/madhead

Re: Remove flicker?

There’s many causes and many treatments to light flicker. The first step is identifying what’s causing it. The two main causes are:
Daylight
Automatic camera settings
If your flicker is caused by the ever changing light of the sun, the solution is pretty obvious. Either get some shades (or any method of blocking out the light), or only work at night. If camera settings are causing your problems, things can get tricky. If you’re using a webcam, go into your camera setting through your driver software and make sure exposure, as well as every other setting, is set to manual. If you’re using a DSLR, go into your settings and insure that your aperture and shutter speed, and everything else for good measure, is set to manual. Use automatic settings for photography, and manual for brickfilming.
-Brickman

Re: Remove flicker?

Brickman has written a great post, so rather than repeat what he said I'll add some of my own advice.

You might still encounter light flicker problems even if you made sure that there's no weirdness going on in terms of automatic settings or on-set light shenanigans. Especially if you're using older equipment (like an old webcam/camera or even an old light bulb) you might run into trouble. Sometimes a very fast shutter speed (think 1/200 or faster) can cause light flicker. This is usually solved by slowing down the shutter speed. Note that this will change the overall brightness of the scene, so readjust your lighting setup and other camera settings accordingly.

Another problem I've run across with my old webcam is that whenever something new enters the scene (like a brightly coloured minifig walking into frame), for some reason the whole brightness is changed. Something that may help out with that is the Deflicker filter for VirtualDub. VirtualDub is a nice lightweight program that allows you to import video clips or image sequences and do some basic processing to them. It's best used early in the stage of editing: I usually import the raw image sequence (directly from the animation program), and export it as a video clip that I can then import into my editing software.

I think the VirtualDub solution is pretty old school/outdated, though, as I've been using this filter from time to time for over 10 years at this point. But who knows, it might be just the thing for you!

Re: Remove flicker?

No sorry, my bad - I should've been more specific...

It's my fault entirely. The flicker is coming from my stupidly knocking the lights on my set. I've used a string of leds to light the set, and to get to some of the figs I've had to reach under them. This has caused some flicker.

I think I may be able to darken the lighter frames, to make them match the darker ones (or vice versa). Or perhaps I may be able to drop the most suspect frames...

That's the current plan anyway. Either that, or reshoot the bad parts. I was more just curious if there was some way that others use to fix flicker after it's already been shot.

Thanks for the replies anyway!

Re: Remove flicker?

You may still get some use out of the VirtualDub filter then - it probably won't remove the flickering completely, but there may be some reduction.

Re: Remove flicker?

Ah, yes. Thank you. Sony Vegas is my NLE of choice, so that makes me wonder if there is a filter/effect built into there that I might be able to use.

Re: Remove flicker?

Back in 2014, END Films made a tutorial on how to remove light flicker using VirtualDub. I've been using this method since i watched it several years ago, and it's worked fine for me. He gives some links in the description to download VirtualDub and the MSU Deflicker.

https://www.youtube.com/watch?v=aV09Jzt1tTU

https://bricksafe.com/files/Wammy/Our%20Friend%20Pablo.jpg  Watch it on YouTube!

"Surely goodness and mercy shall follow me all the days of my life: and I will dwell in the house of the LORD for ever."
~ Psalm 23:6 ~

Re: Remove flicker?

Hi! If you are still looking for a solution to the problem, then maybe this will help you:
Try setting the shutter speed according to the voltage standard in your country, for example:
I have 50 Hz, Europe.
USA 60 Hz

I hope this will help you without using additional programs.


mad_hatter wrote:

Simple question: is there a way to successfully remove flicker? I've made a bit of a check-up on my current film...

mini/lol

mini/madhead