<p>One thing you could do is track the rotation of the drum, so that it's virtually stabilized and then use a Null-object to drive the rotation of the layer. This would give you a fresh, new, smooth rotation all the way through.</p>

CC BY-SA 4.0
2020-06-09T12:10:29.950Z
2020-06-09T12:10:29.950Z
Florian Claaßen
<p>Use mocha to track the drum of the machine, but mask out its contents.  Mocha can handle rotation of planar surfaces, and there’s a lite version which ships with AE. Use the stabilize module to even out the movement.</p>

CC BY-SA 4.0
2021-11-01T19:53:08.550Z
2021-11-01T19:53:08.550Z
Jason Conrad
<p>I have a video of myself inside of a human-powered rotating drum. This video's shot at 60 frames per second, but due to to the unreliable velocity of human operators, this drum rotates at different speeds throughout the video. I need the drum to rotate at a constant speed for use in a video installation.</p>

<p>I'm wondering if there's a processing technique (perhaps in after effects) I could use to programmatically stabilize the speed of this drum, maybe by use of a tracking point on the drum's edge. What I'm doing right now is overlaying eight equally-spaced diameters on top of this video, and attempting to get a constant amount of rotation (one-eighth of a turn) every thirty frames through premiere's speed ramping tools.</p>

<p>Unfortunately, this is not an ideal solution as even within one-eighth of a rotation there are speed variances and minor starts and stops that do not produce a stable rotation.</p>

<p>Does anyone have any ideas on how to approach this? Attached is a picture for reference.</p>

<p><a href="https://i.sstatic.net/9fzpi.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/9fzpi.jpg" alt="Me in a dryer drum with eight equally spaced reference diameters"></a></p>

CC BY-SA 4.0
2021-11-01T16:08:30.357Z
This is the best video.stackexchange question ever. Don't lock yourselves in washing machines, kids
tomh
<after-effects><video-editor><editing><framerate>
Use of time remapping to stabilize the velocity of a rotating object?
Charlie Dean
# Use of time remapping to stabilize the velocity of a rotating object?

(Asked by: username_0 on 2019-12-03)

I have a video of myself inside of a human-powered rotating drum. This video's shot at 60 frames per second, but due to to the unreliable velocity of human operators, this drum rotates at different speeds throughout the video. I need the drum to rotate at a constant speed for use in a video installation.

I'm wondering if there's a processing technique (perhaps in after effects) I could use to programmatically stabilize the speed of this drum, maybe by use of a tracking point on the drum's edge. What I'm doing right now is overlaying eight equally-spaced diameters on top of this video, and attempting to get a constant amount of rotation (one-eighth of a turn) every thirty frames through premiere's speed ramping tools.

Unfortunately, this is not an ideal solution as even within one-eighth of a rotation there are speed variances and minor starts and stops that do not produce a stable rotation.

Does anyone have any ideas on how to approach this? Attached is a picture for reference.

[![Me in a dryer drum with eight equally spaced reference diameters](https://i.sstatic.net/9fzpi.jpg)](https://i.sstatic.net/9fzpi.jpg)

**Tags:** after-effects, video-editor, editing, framerate

> **Comments:**
> **username_1**: This is the best video.stackexchange question ever. Don't lock yourselves in washing machines, kids  

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## 2 answers

### Answer by username_2 on 2020-06-09. Score: 1

One thing you could do is track the rotation of the drum, so that it's virtually stabilized and then use a Null-object to drive the rotation of the layer. This would give you a fresh, new, smooth rotation all the way through.


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### Answer by username_3 on 2021-11-01. Score: 0

Use mocha to track the drum of the machine, but mask out its contents. Mocha can handle rotation of planar surfaces, and there’s a lite version which ships with AE. Use the stabilize module to even out the movement.


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