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Interpreting 59.94 to 23.976 turns out jittery, even while converting in AME

New Here ,
Sep 01, 2020

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Hey,

I'm working on a 23.976 timeline and no method works:

Interpretting footage, speed ramping, Optical Flow, Frame Blending...

The footage always turns to be choppy.

 

I even tried re-encoding using AME while interpreting the footage, and it still turns out to be choppy.

The footage is in ProRes 422, recorded using the Atomos Ninja V and the Sony A7 III.

 

Has anybody encountered the same problem?

 

Itai

 

 

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Interpreting 59.94 to 23.976 turns out jittery, even while converting in AME

New Here ,
Sep 01, 2020

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Hey,

I'm working on a 23.976 timeline and no method works:

Interpretting footage, speed ramping, Optical Flow, Frame Blending...

The footage always turns to be choppy.

 

I even tried re-encoding using AME while interpreting the footage, and it still turns out to be choppy.

The footage is in ProRes 422, recorded using the Atomos Ninja V and the Sony A7 III.

 

Has anybody encountered the same problem?

 

Itai

 

 

Topics

Editing, Error or problem, Formats, Performance

Views

58

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Adobe Community Professional ,
Sep 01, 2020

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So are you trying to deliver a 23.976 sequence but your footage is 59.94? You will have to drop frames obviously (so will never be as smooth as the original). There will also be very little motion blur with a high frame rate so when you drop frames it can give you a slightly staccato effect. Or are you trying to play the footage at 23.976 so it will be slow-mo?

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New Here ,
Sep 01, 2020

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I mean to slow mo. 

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Adobe Community Professional ,
Sep 02, 2020

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Ok, so interpreting is usually the easiest and reliable method to make them slow-mo. You should get a smooth frame for frame mapping if you interpret to 23.976 and put it on a 23.976 timeline. If you step through the sequence frame by frame, do you get a consistent cadence? Ie. no duplicate frames and no skipped frames?

What exactly do you mean by choppy? Perhaps it's just a playback issue?

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New Here ,
Sep 02, 2020

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It's not a playback issue. If I use "Interpret Footage" and assimilate 23.976 fps Premiere duplicates frames instead of playing it smoothely (I tested it frame by frame). Meanwhile, on DaVinci Resolve 15 it slows down just fine, so it seems to be a software issue.

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New Here ,
Sep 02, 2020

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UPDATE:

It seems that the problem is in the Ninja V.

Some of the footage is true 59.94 fps and some has duplicated frames.

I found this guy had the same problem: https://community.adobe.com/t5/premiere-pro/1080-50p-60p-footage-duplicating-every-other-frame-in-pr...

I'm contacting Atomos to see how they could help me.

Now I need to convert most of the footage to 23.76 fps to avoid the duplicated frames.

 

Itai

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Adobe Community Professional ,
Sep 02, 2020

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OK.

Yeah, if the footage has duplicate frames burned in by the Atomos then you won't be able to get the nice slow-mo you're after without using some sort of optical flow. Resolve applies this by default for mixed rates so thats probably why you were seeing a 'smooth' result. 

So yes, you are probably best removing the duplicate frames by exporting at 23.976 and you could try to slow the result to 50% speed with optical flow if you need the clips to be slow-mo.

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