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Trajectory Control

Updated over a month ago

What is Trajectory Control?

Go beyond the old ways of text prompts to add movement to objects. Trajectory Control lets you dictate exactly how a subject moves This allows for intuitive, hands-on direction and produces smoother, more natural motion. Only Marey offers this level of natural control.

How it works

Trajectory Control puts you in the director's chair. Take any existing image and chart motion paths over it, layering changes to your exact specifications. Dramatically alter poses, exaggerate motion to greater effect, or even combine several motion paths into one composition.

  1. Open Trajectory control from your main dashboard

  2. Upload an Input Image (Keyframe) that you want to add motion paths to. Then, select Begin.

  3. Create motion layers in the trajectory control console. IMPORTANT: add 2-3 non-motion layers by adding a layer and simply placing the dot by itself on a part of the image you do not want to move i.e. the ground or a fixed object

    • A new 'Trajectory Control' window opens containing a canvas showing your input image and a prompt to 'Add Layer'.

    • Click 'Add Layer'. When you add a layer a timeline will appear under your canvas with a prompt to 'Place a point on the canvas to begin'.

      Layers are where you'll create individual motion paths. You can add a single layer, or use several together on a single image.

  4. Create motion paths

    • Hover your mouse over any point on the canvas; notice that a '+' cursor appears. Left-click on an area of your image that you want to start a motion path from. A red dot will appear on your canvas at that point, and a playhead with a diamond marker (a keyframe) will appear on frame 1 in the timeline below.

    • Drag your playhead forward to where you want your next motion path checkpoint to be set. Placing your next checkpoint closer to your first keyframe can create faster motion in your video. Placing it father away will create slower motion.

    • On the canvas, left-click on an area to set your next motion checkpoint (your next keyframe). Think of this as creating a path from Point A to Point B for your subject.

  5. Click 'Save and Close' when you're satisfied with the motion paths you've created for your subject. You'll see "Processing trajectory" while the paths are rendered.

  6. Add a prompt for your video to describe what you want to happen in the video.

7. (Optional) Adjust the advanced settings by clicking the speedometer icon next to Trajectory control. These will determine the strength of the control being applied.
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8. Hit Generate and review your generated video, making adjustments to your prompt or settings if you aren't happy with the result.

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