SloShutter Pro

Continuous drag calculated by optical flow. Long exposure, on video.

Studio only$5

What it does

Optical flow, not frame stacking.

Motion vectors are calculated between frames and the drag is drawn along them, so the trail is continuous instead of stepped.

Shutter angle you can dial.

Set the drag as a shutter angle and the result matches what a longer exposure would have captured at that frame rate.

Direction and falloff.

Bias the trail forwards, backwards or both around the current frame, and control how quickly it fades.

Five controls, no node tree.

It is one effect on the clip. Everything is in the inspector.

Controls

Control	Range	What it does
Shutter angle	180 – 1440	Length of the drag.
Direction	Back / Both / Forward	Where the trail is drawn relative to the frame.
Falloff	0 – 100	How fast the trail fades out.
Samples	4 – 32	Smoothness of the drag against render time.
Blend	0 – 100	Mix with the original frame.

Compatibility

Install type: Fusion effect (.drfx). See the install guide.

Honest notes

What it can't do.

Studio only. Optical flow is a Studio feature — in the free edition the effect installs but produces nothing usable.
Optical flow struggles with motion blur already in the footage, heavy grain, repeating patterns and fast cuts. Artefacts there are the estimator failing, and no setting hides it completely.
It is slower than Lite. High sample counts on 4K need cache.
Transparent or reflective subjects confuse the vectors.

What's included

Questions before buying? Write to support@nodexplugins.com — the person who made the plugin answers.

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