How to Remove Flicker from Oscilloscopes - No plugins
These oscilloscopes were like showlights on the Las Vegas strip. Very distracting from the interviewee. To get rid of them, I used:
3 additional layers; each offset to the left by 1 frame
Blending mode: Lighter Color (not Lighten) on all three frames
A mask around the scopes, edges feathered about 60px
It looks much better after 2 layers, but 3 layers got rid of the higher oscilloscope, too.
Reasoning: I wanted to keep the slight moving light reflections on the devices, so I didn't want to use a static frame. Also, as the interviewee moves slightly, the edges of the shirt sleeve didn't move too in a static frame, so it looked bad.
How I developed this workflow: I stepped through the footage frame by frame, and noticed that the larger scope repeats on a 3-frame cycle. I also thought that I want only the lighter pixels within my masked section, to "fill in" the sine curve all the time. So I thought, "Three frames are needed, not just one or two which is common in flicker-removal...." I tried some plugins, but they didn't give very good results. I'm really pleased with this - imo rock solid.
I'm doing this in Premiere Pro, but I think it could be done in any editing software with Blend modes for opacity. Hope this is useful to others!