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M
mhossey
Inspiring
May 23, 2018
Answered

Dropped Frame/Stutter after 60fps to 24fps Conversion

  • May 23, 2018
  • 7 replies
  • 12884 views

Hi, new to video (AI & PS are my forte). I shot some 60fps footage at 1/125 on my lumix G7 with the intention of interpreting to 24fps for slow-mo shots. To me it looks like a frame is being dropped every 1/2 second or so - like a stutter. Any suggestions?

  • I converted 60fps to 23.976 using the 'interpret footage' method.
  • I also tried working in a 60fps sequence and slowing footage to 40% - same result.
  • I tried converting 60fps to just '24 fps' - same result.
  • The frame drop occurs while working on the timeline and in the exported video.

I put a link to the footage below so you can see, it looks  grainy but I think that's bc I used whatever the standard H.264 option that was pre-checked.

Footage Here: Dropbox - Sequence 02.mp4

This topic has been closed for replies.
Correct answer excited_Genie16B8

The best idea I have is that you had lens stabilization turned on.  When using OIS on a tripod, this kind of jerkiness is common.  I wonder if the same holds true when using a gimbal.

7 replies

O
onitako
Participant
April 28, 2020

Try Time Posterize in the Effects Panel. That drops frames in the way you want rather than reinterpret frame to a different speed. Essentially the difference  from 60 to 24 fps is the number of frames recording the time which creates clean motion but looks too perfect. Time Posterize will remove those frames inbetween to make your 60fps video look like 24 fps without slowing in down.

C
Community Expert
Carlos ZiadeCommunity Expert
Community Expert
May 25, 2018

mhossey​ make sure you do not have small little glitches on your footage

especially if they were shot on high ISO, you will not notice them, but I tried

a lot with slo-mo and found out the best practice is to have the highest quality

footage you can achieve upon shooting on set, and the cleanest videos without

anything called noise

M
mhosseyAuthor
Inspiring
May 23, 2018

Alright alright alright. Between the in-camera stabilization being turned off and the ISO now at 200 we got that silky smooth slow-mo. Test footage below - enjoy some b-roll. Thanks for playing everyone and thanks for your input.

Footage: Dropbox - butterz.mp4

B
Community Expert
Byron CortezCommunity Expert
Community Expert
May 23, 2018

Hi

Have you used After Effects? Launch it from the timeline of Premiere Pro to After Effects with right click "Replace with After Effects Composition" and in After Effects use Frame Blending, may it work for you, try it. See the screenshot.

Byron.
M
mhosseyAuthor
Inspiring
May 23, 2018

Is this going to be better or different than optical flow - not wanting to use two programs

B
Community Expert
Byron CortezCommunity Expert
Community Expert
May 23, 2018

It's better and it can be helpful.

Read this.

Time-stretching and time-remapping in After Effects

Byron.
E
excited_Genie16B8Correct answer
Legend
May 23, 2018

The best idea I have is that you had lens stabilization turned on.  When using OIS on a tripod, this kind of jerkiness is common.  I wonder if the same holds true when using a gimbal.

    M
    mhosseyAuthor
    Inspiring
    May 23, 2018

    Thanks so much! Definitely going to turn that off and check the results. Will report back.

    C
    Community Expert
    Carlos ZiadeCommunity Expert
    Community Expert
    May 23, 2018

    You have to be working on high quality footage, the highest the best for slomo, stabilizers etc...

    right click on your clip - time interpolation - optical flow

    did you try that ?

    Organizing assets in the Premiere Pro Project panel

    go to bottom (change frame rate of clips)

    Creating Beautiful Slow Motion in Adobe Premiere Pro - The Beat: A Blog by PremiumBeat

    What is the max percentage you can slow down high frame rate footage in Adobe Premiere Pro? — Rocket Pencil Productions

    M
    mhosseyAuthor
    Inspiring
    May 23, 2018

    I used a glidecam for the footage so it should be fairly smooth, along with 60fps - are you saying there's a way for me to get better quality footage? Or maybe just a better camera? The G7 is a 4/3, not sure if that plays into it.

    I did try optical flow and it makes it smooth! I guess the question left is why am I getting frame drop in the first place, is this something that videographers just kind of 'deal with'? Going to read those articles today.

    C
    Community Expert
    Carlos ZiadeCommunity Expert
    Community Expert
    May 23, 2018

    Those are not actually dropped frames, instead, those are misinterpreted

    frames by premiere when not having enough data and pixels to draw from,

    sometimes it works sometimes not, it all depends on the amount of data and

    pixels to draw from, but with uncompressed, raw and native high quality

    footage, it is easier and more precise for software to draw and analyse the

    needed pixels ... its just my own explanation as i understand the process

      J
      joshi0411
      Inspiring
      May 23, 2018

      I believe you should make a sequence of 23.976 fps.

      Right click the 60 fps file in the project bin. Modify - Interpret Footage - Under "Assume this frame rate" enter 23.976

      Now put this clip in your 23.976 sequence.

      That will be butter smooth (slow)

      The settings you are using will definitely not be smooth. As Sequence is of 60 fps ans clip is 23.976 fps.

      PPro will randomly generate some frames to match the sequence settings.

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