How to fix flickering video

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Wojciech Zawada

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How to fix flickering video

PostSun Apr 15, 2018 9:01 pm

I just finished shooting clips for a sport center commercial video. I went back home and moved all my clips from SD cards to my computer. Unfortunately, while checking the clips, I have discovered a lot of flicker caused probably by high shooter speed (for slow motion scenes) and artificial lighting going out of synch. I'm quite sure Davinci Resolve can get that flickering solved, but not sure on how to do it. Is anyone able to point me in to right direction? I'm not running a studio version so time lapse deflicker is not really an option.
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Jeff Brass

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Re: How to fix flickering video

PostSun Apr 15, 2018 10:22 pm

without studio or a deflicker plugin I don't think you will have a lot of success.

I've used the DR studio timelapse deflicker with mixed results, and mostly use https://digitalanarchy.com/Flicker/main.html
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waltervolpatto

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Re: How to fix flickering video

PostSun Apr 15, 2018 10:45 pm

"If" you are testing resolve 15, there is a big improvement in the flicker tools there.
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Jeff Brass

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Re: How to fix flickering video

PostSun Apr 15, 2018 10:56 pm

will check it out. I've been too busy playing ...errr....learning.... new timeline tools, fusion etc etc :D
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Wojciech Zawada

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Re: How to fix flickering video

PostMon Apr 16, 2018 7:26 am

I knew there will be a day when my free version of DR will be replaced by Studio one :) Just wanted to wait a bit more and get it together with BMPCC 4K.
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Sam Steti

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Re: How to fix flickering video

PostMon Apr 16, 2018 3:35 pm

waltervolpatto wrote:"If" you are testing resolve 15, there is a big improvement in the flicker tools there.

Hey W.
Did you try it ?
(cannot test so far)
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Francois Dompierre

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Re: How to fix flickering video

PostMon Apr 16, 2018 6:30 pm

Sam Steti wrote:
waltervolpatto wrote:"If" you are testing resolve 15, there is a big improvement in the flicker tools there.

Hey W.
Did you try it ?
(cannot test so far)


I just tested it on a project where I had previously used FlickerFree by Digital Anarchy and WOW ! I'm blown away by Resolve 15's OFX deflicker, congrats team Blackmagic! And a big thank you because we often need to deal with flicker.

Results are as good as FlickerFree (so far) and on a few slow-mo shots with a lot of motion I was actually able to get rid of the flicker whereas FlickerFree just couldn't do it! So WOW. And it's crazy fast as it uses 100% of both our Titan Xp GPU's. FlickerFree doesn't make use of CUDA (on Mac, at least) so it's painfulllllly slow. Resolve's version works great on bad h264 drone compression flicker too (same as FlickerFree but way faster).

François
François Dompierre
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waltervolpatto

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Re: How to fix flickering video

PostMon Apr 16, 2018 8:16 pm

Thanks for the test François!
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Jack Fairley

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Re: How to fix flickering video

PostMon Apr 16, 2018 11:39 pm

Tried it on an HD 23.98 file with really bad strobing from a light source not matched to shutter. With two 1080 Tis it worked in real time, about 95% on one and 65% on the other, with (to me) a great result.
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Sam Steti

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Re: How to fix flickering video

PostTue Apr 17, 2018 10:30 am

Francois Dompierre wrote:
I just tested it on a project where I had previously used FlickerFree by Digital Anarchy and WOW ! I'm blown away by Resolve 15's OFX deflicker................
François

Super cool, thx François for this answer... It looks like I won't be forced to schedule an extra pass in FCP7 just for that (when I'll have to cope with that yearly same specific issue in the same specific place in June :) ).
Good to know...
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AndreasOberg

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Re: How to fix flickering video

PostSun Jul 29, 2018 7:32 pm

If this works this well in Davinci 15 then it will help out a lot. Just testing Digital A Flicker Free and it just spent 8 minutes rendering a 4k section that is about 7 seconds long. Results seems to be great but it takes a very long time since it only uses 7% CPU and 0% GPU.

Tested flicker free in Davinci 14 and it had lots of problems so looking forward to testinb Dav 15.
/Andreas
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Wojciech Zawada

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Re: How to fix flickering video

PostMon Jul 30, 2018 12:05 pm

Sam Steti wrote:
waltervolpatto wrote:"If" you are testing resolve 15, there is a big improvement in the flicker tools there.

Hey W.
Did you try it ?
(cannot test so far)


Yes I did. I works out of the box. Literally, I just dragged deflicker from effects palette to my clip and that was all I have done. All flickering was gone.
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behjingqiang

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Re: How to fix flickering video

PostMon Jul 30, 2018 5:41 pm

Resolve 15's Deflicker is awesome.
We use it a lot in our current feature film grading.

If you do notice weird movements/ghosting after applying, try to play around with Advance control to achieve better results.
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AndreasOberg

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Re: How to fix flickering video

PostTue Jul 31, 2018 12:12 pm

Do you think it will work for timelapses as well with flicker? Similar to Boris and flicker free.
Would be fantastic if it could handle changing apertures.

Andreas
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Jack Fairley

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Re: How to fix flickering video

PostTue Jul 31, 2018 6:09 pm

There is a setting for timelapse, a setting for fluorescent lights, and then the DIY advanced controls.
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Bryan Worsley

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Re: How to fix flickering video

PostTue Jul 31, 2018 7:53 pm

For treating 'common-or-garden' flicker/strobing due to shutter-speed mismatch under fluorescent lights, I find this 'frame offset/blend/sharpen' technique can work surprisingly well, for relatively static scenes at least:



Easy to apply in Resolve.
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Wojciech Zawada

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Re: How to fix flickering video

PostWed Aug 01, 2018 10:24 am

That's the point. This will only work with static footage. I tried that out before went for studio version of DR

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