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Sh004
Participant
October 3, 2021
Question

Initial fade in of sequence pixelated - corrects itself when fade in complete.

  • October 3, 2021
  • 8 replies
  • 2127 views

Hi all,

 

I have a 40 minute sequence which, when I export in full, repeatedly exports the initial first fade-in at the beginning as a pixelated and dragged-out visual. It looks like what you'd expect from a very low bitrate. When the fade in is complete (it lasts only a few seconds), however, the image returns to regular, and perfectly fine, high quality for the rest of the entire export. It is only here at the first fade-in there is any issue.

 

The issue seemed to begin when I changed the sequence frame rate from 24 to 25fps. The footage is 25fps, and this particular clip at the beginning is 100fps slowed 50%. What is strange, however, is that when I export the fade-in by itself, or even include the minutes after it, there is no problem. It only seems to happen when I export the full sequence. 

 

Sequence settings:

 

3840x1634, square pixels, 25fps, Progressive, the preview render format for most of the time was GoPro cineform, but I have changed it in various fix attempts.

 

Things I have tried so far:

 

1. I have tried exporting at different bitrate qualities, but the problem persists regardless of bitrate settings.
2. I have tried software and hardware encoding.

3. I have tried exporting in Premiere Pro and Media Encoder

4. I have tried clearing the preview files, media cache, peak files, etc.

5. I have tried changing the preview format and codec.

6. I have tried exporting the first fade in by itself, reinserting it into the sequence, and then exporting the sequence in full.

7. I have tried insterting a black graphic over the beginning and fading out of that, instead of the fade in.

8. I have tried copying the timeline into a new sequence.

9. I have tried exporting to different formats, including Quicktime.

 

Any help at all would be greatly appreciated. Thanks.

 

 

    This topic has been closed for replies.

    8 replies

    H
    Hallfam
    Participant
    July 25, 2024

    Did you ever figure this out? Im having the same exact behavior, and the initial image is actually just a JPG, and its ONLy THIS session doing it... Ive knocked out 10 jobs tonight, this one is being a problem. ((and i think that might be the smoking gun here, its just THIS one, something in the source file.... all the others were fine...) I tried all the sequence changes mentioned, as well as export adjustments, I nested the whole timeline, Rendered it in the edit, ect ect it works as mentioned in single-pass its fine. Its only double pass that has the pixelaition on the first few seconds. I have a 2022 m.2MAX with 64gb of ram.

    D
    da_deva
    Participant
    September 14, 2023

    I am also having this issue! Anu fix yet??

    M
    Michael Grenadier
    Legend
    September 14, 2023

    da_deva, troubleshooting from a distance is difficult and we have to approach this in a systematic fashion if we're going to be able to help you.  So please tell us your system specs: OS version, Premiere version, amount of RAM, Hardware specs including graphics card and your source propertries and sequence settings.   Once we have this info, we can proceed with troubleshooting the problem...

    F
    filipecasimiro
    Participant
    August 10, 2023

    Also Facing the same issue, but with a fade out in the end of the video.

     

    I noticed that if the bitrate is lower it gets better, but not perfect.

    V
    Volodymyr30027311tl2a
    Participant
    May 23, 2023

    Hi! Did you manage to solve this problem? I ask because I faced the same thing :((

     

    S
    Steve Griffiths
    Inspiring
    October 4, 2021

    You posted this:

    6. I have tried exporting the first fade in by itself, reinserting it into the sequence, and then exporting the sequence in full.

     

    ... this indicates that there is nothing wrong with the fade itself (from Premiere Pro) but it's tied to the codec you are encoding to and the settings you are using.

    The fact that when you placed a fully rendered clip with the fade built in and it still pixelates when re-encoded pretty much absolves Premiere Pro as the source of the problem.

    So VBR 2 pass is your culprit. Stay with VBR 1-pass and maybe up your data rate slightly. The results should be comparable to 2-pass anyway.

     

    One other thing - your clip dimensions of 3840x1634. 1634 is not divisible by 8 (or 4 or 16) to a round number. In the past some codecs have issues with encoding to these odd dimensions. They like pixel ratios to be able to be evenly broken down into square groups of pixels.

     

     

     

      S
      Sh004Author
      Participant
      October 4, 2021

      Hi Steve,

       

      I agree - I think it's definetly something that is happening in the encoding process. When I exported the full sequence as VBR 1 pass there was no issue.

       

      What is strange, is that when I export the fade in by itself, using VBR 2 pass, there is no problem. It's only when I export the full sequence.

       

      And, when I exported the full sequence using VBR 2 pass in the past, before I changed the frame rate of the sequence from 24 to 25, there was no issue then, either.

       

       

      S
      Steve Griffiths
      Inspiring
      October 5, 2021

      Only other thing I can think of ...

      try changing the 'Key Frame Distance' under 'Advanced Settings'. It looks like 90 and 72 are the most common Key Frame Distance settings. I'd be interested to know if going lower makes any difference.

       

      Sorry, not really any help here and it's painful that everytime you run a test you have to re-encode a 40 minute program! But good luck.

      M
      Michael Grenadier
      Legend
      October 3, 2021

      you might try smart rendering

      https://community.adobe.com/t5/premiere-pro-discussions/faq-what-is-smart-rendering/td-p/10648488

      At least you'll hopefully see what's going on BEFORE you do a lengthy export.

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

        Try resetting the preferences:
        https://community.adobe.com/t5/premiere-pro/faq-how-to-reset-trash-preferences-in-premiere-pro/td-p/8236158?page=1

        If that doesn't work, try resetting the Workspaces:
        Reset a workspace
        Reset the current workspace to return to its original, saved layout of panels.
        1. Do one of the following:
        • Click the Workspace menu icon and select Reset to Saved Layout.
        • Choose Window > Workspace > Reset to Saved Layout.
        from here:
        https://helpx.adobe.com/premiere-pro/using/workspaces.html

        If that doesn't work, try Preferences > Audio Hardware and set Input to None.

        If that doesn’t work, try updating or rolling back your graphics driver directly from the video card manufacturer’s site. If NVIDIA, do a clean install of the latest Studio Driver (NOT the Game Driver)

        If that doesn't work, try creating a new project and import the old one into it.

        Ann Bens
        Community Expert
        Ann BensCommunity Expert
        Community Expert
        October 3, 2021

        Turn off Composite in Linear color in the sequence settings. See how that goes.

        S
        Sh004Author
        Participant
        October 3, 2021

        Thanks Ann, I will try that now.

         

        I found out today that if I do a VBR 1 pass there is no issue, but if I do VBR 2 pass there is. I don't know if that could be useful information.

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

        Try turning off Hardware encoding in the export settings.

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