Skip to main content
B
Big Al 3D
Known Participant
April 5, 2021
Question

Flickering When Using Green Screen

  • April 5, 2021
  • 1 reply
  • 2648 views

So I'm asking for my brother who uses Premiere Pro, latest version on a 2013 Mac Pro. I will create 3D content to be incorporated with his green screen shots. He will drop my PNG files with alpha into his timeline, then layers his green screen shots of people (Ultra Key) looking at cars in a showroom. Everything looks great. Then he'll render to see how it looks. Randomly in different areas, you will see some of the clips flickering. If he renders again, it might come out perfect. It also might show flicker in different areas than before. This turns into a game of rendering and keeping your fingers crossed in hopes of no flicker so it can be exported for delivery. I am the techno-geek so I will be visiting his studio to find a solution to this problem. I know to look at the rendering engine and other GPU-related settings. Was wondering if anyone else had to deal with a similar problem.

 

Note, this issue has spanned the use of several cameras and codecs, so I'm thinking it's a setting within Premiere. He also is not familiar with After Effects, so that's not an immediate solution... yet. If you need to see the flick, I can aquire a clip and post a link here.

This topic has been closed for replies.

1 reply

Jeff Bellune
Jeff Bellune
Legend
April 5, 2021

Two things to try:

  1. Uncheck this if it's checked:

 

2. Reading your OP, it seems the green screen shots will be composited above the 3D content? If so, nest the green screen shots into their own sequence and place that sequence above your png files. Like pre-composing in After Effects, nesting forces a render order in Pr. So the green screen footage would be rendered before being composited on top of the 3D image sequence. (Also consider rendering your 3D content without an alpha channel *if* it is supposed to be the background layer for the shot.)

    B
    Big Al 3DAuthor
    Known Participant
    April 5, 2021

    Thanks for your reply. I've attached a video he took of his screen. Everything in this shot is a 3D render except the people. As you can see, there are multiple layers going on here. This might help.

    Jeff Bellune
    Jeff Bellune
    Legend
    April 5, 2021

    Viewing the video failed here in FireFox. Regardless, with many layers going on, I definitely recommend nesting one or more of the video tracks to force Pr to render the footage and effects in the order you want. It may take a bit of experimenting to find out the optimum combination.

     

    Do you want me to help you convince your brother that investing time learning Ae is a sound investment if you will be doing much 3D and compositing work? 😀

    Terms & ConditionsAccessibility statement
    Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices