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GenghisKhak
GenghisKhak
Participating Frequently
December 1, 2016
Question

Blacks flicker after exporting chromakeyed footage.

  • December 1, 2016
  • 4 replies
  • 4972 views

I carefully adjusted my key using the Ultra Key effect and masking where necessary.  Inside of Premiere Pro my footage looks great. However, when I export my footage the blacks in my keyed layer flicker and look pixelated.  The blacks aren't 100% opaque either- I'm able to see through them.

The green screen was poorly lit so there are a lot of shadows, but in the preview window inside of Premiere, it looks perfect.  It's only when I export the sequence and view the file that it look bad.

What is most likely causing this?  Could it be export settings or is there some kind of color correction I can do before keying that will help get a better key?

Thank you for your help!

This topic has been closed for replies.

4 replies

T
The great dog Chippie
Inspiring
August 13, 2020

I am currently experiencing the same thing. Looks perfect in premiere pro after rendering.  When I export to h.264 and review the mp4 file, it looks like I have a Christmas tree lights blinking on and off on my subject in the foreground. Isn't the rule is "what you see in premiere pro is what you get" when you export?

    Peru Bob
    Community Expert
    Peru BobCommunity Expert
    Community Expert
    December 3, 2021

    Try turning off Hardware encoding in the Video tab of the export settings.

    B
    brad5D2C
    Participant
    December 27, 2021

    There's no turning it off. You can just change it to "software encoding." I did that and it didn't work either. 

    R
    Community Expert
    RobShultzCommunity Expert
    Community Expert
    February 18, 2019

    If you have access to After Effects you may want to right click on the footage in the timeline (without Ulta key appled) click on replace with After Effects composition, and try using the Keylight with spill suppressor) effect.

      G
      glasj2002
      Participant
      February 18, 2019

      Hi, Thanks Rob.  Yes, I do have access and I was aware I could do that.  I appreciate the great suggestion.  But, my concern was more of how Premiere Pro shows the alpha channel and composite as flawless but there are issues after render.  I have used PP without any real issue in the past (I hate to say - probably because green screen lighting was not so great and I used a more aggressive setting to resolve issues ).  For simple keying, I was hoping to leave out the extra step and baggage that comes with bringing in another app.  Thanks again.

        G
        glasj2002
        Participant
        February 18, 2019

        Well it's 2019 and I am having the same issue too in Premiere Pro CC 2019.  Looks fantastic in Premiere Pro and when I look at the alpha  there is absolutely no flickering - it is only after Render.  Render is set to maximum and using Mercury...Software Only setting.  I have not had this issue previously. 

          G
          glasj2002
          Participant
          February 18, 2019

          Okay -strange - I set the Ultra Key settings to the Aggressive preset and it renders fine.  What is getting me is that I see absolutely no difference inside of Premiere Pro.  I undocked the Program panel and maxed it to the 32 inch monitor.  No flicker on my custom setting at all.  Also no flicker on the aggressive setting but why the difference after render?. 

          This is especially concerning since the green screen lighting was very good (for once in my life )

          Vidya Sagar
          Adobe Employee
          Vidya Sagar
          Adobe Employee
          December 1, 2016

          Hi Genghiskhak,

          The issue might be with GPU renderer. To corner the issue, just for test, Change the renderer to Mercury Playback Engine Software only & try export.

          Instructions:

               [File > Project Settings > General > Renderer,

               Change the Renderer to Mercury Playback Engine Software only > Click OK,

               In Video Rendering & Playback Settings Changes window click on Delete Previews ]

          Please let us know the status.

          Thanks,

          Vidya Sagar.

          GenghisKhak
          GenghisKhakAuthor
          Participating Frequently
          December 2, 2016

          My renderer was already set to Mercury Playback Engine Software Only.

          Also, I'm not sure what you mean by "In Video Rendering & Playback Settings Changes window click on Delete Previews"

          However, I did go into the project file and delete the previews for my project.

          I tried exporting again and I had the same issue.  I really don't know what to do here

          Vidya Sagar
          Adobe Employee
          Vidya Sagar
          Adobe Employee
          December 2, 2016

          Hi Genghiskhak,

          "Video Rendering & Playback Settings Changes" is a dialog box which appears after changing the Renderer in Project Settings.

          Just for test, Import the exported file into Premiere Pro & check the flicker & pixelation.

          If issue persists,

          Render & replace the clips on the sequence & try export.

          [Instructions: select all the clips in the sequence > Right click > choose Render & Replace. ]

          Please let us know the status.

          Thanks,

          Vidya Sagar.

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