I am working on documentation of a performance/musical instrument design project I completed in the springtime. The footage I received from my cameraman was shot on a GH5, and it's technical specs are 23.976 fps, 1920x1080, and H.264 10 bit 4:2:2.
I have completed my edit in Premiere and used a couple of "Dip to Black" effects as transitions between different moments of my performance. Everything looked great and I rendered the project out. After watching the render, I noticed that on every fade to black transition, a bunch of flickering lines would appear on the white wall behind me.
Here is an example of the problem: https://vimeo.com/346004760 (the password is "help")
Does anyone have any clue as to why these flickering lines are appearing during fade to black transitions? How could I get rid of them?
I've spent the past two days trying to find a solution, to no avail: the problem continues to appear. Aside from countless hours of Googling, here is a list of things I have tried:
- Switching from GPU to Software renderer
- Removing all effects except dip to black i.e just Dip to Black on pure raw footage
- Using opacity keyframes from 100 > 0 > 100 instead of dip to black
- Rendering the project in every imaginable way i.e .avi, very high bitrates, CBR, playing with every encoding settings
- Cleaning media cache
- Installing an older version of Premiere, downgrading the project, and rendering out of the older version
- Rendering the same footage on a Macbook (I usually work on a PC)
I did learn that I can replicate the issue just by setting In and Out points on the timeline and rendering inside Premiere i.e by going to Sequence > Render In to Out. The flickering lines then appear when I preview the timeline. They do not appear if I haven't pressed "Render In to Out". This cut my troubleshooting time down considerably, as I didn't have to keep exporting footage.