Flicker Reduction - Histogram smoothing

paul-marshall wrote on 8/26/2025, 4:30 AM

Is it me or is the Vegas 22 help not much help?
I'm trying to use flicker reduction on some 8mm cine film and I want to know what histogram smoothing does. It requires running some analysis which takes a long time. I want to know what it does, how to fine tune it and if it will be worth the wait.
This is whay Vegas help tells me:

Histogram smoothing

A reduction method that smooths the histogram of the image over time to reduce flicker. It is an option under the "Reduction Mode" setting.
Thanks for that. I had kind of deduced that for myself!

Comments

Reyfox wrote on 8/26/2025, 5:34 AM

One way to find out what it does is to try it. That is what I do. I'll try different combinations and settings and go from there.

It is probably good to know the specifics of what an adjustment does, but I just want it to work.

I've tried the Flicker Control and it works pretty good! I thought that 50hz would solve the issue, but it didn't.

paul-marshall wrote on 8/26/2025, 5:48 AM

Yes that is what I will do of course. But a little more help from the help would be useful. I know Flicker Control works pretty well on a 50/60hz lighting flicker. Usually there is plenty of help to be found from users online so I wonder if the help writers are getting a bit lazy.

Dexcon wrote on 8/26/2025, 6:20 AM

I found a GoPro 4K video shot indoors with lots of fluro flicker. In the Video Scopes Histogram display when playing the event, the top edge of the histogram was a mass of peaking and troughing movement. Adding Flicker Control 'Histogram Smoothing' did just that, it evened out the peaking and troughing thus smoothing the top edge of the Video Scopes Histogram display. In this case, it only marginally improved the flickering which was (presumably) 60 HZ fluro lighting shot on a 50 Hz camera.