Bulin 47 Motion Reference: Choose and Prepare a Clear Clip

Submit your own motion reference

The site accepts a single MP4 or MOV reference from 3 to 15 seconds, up to 20 MB. Each side must be at least 340 pixels, with a vertical 9:16 or landscape 16:9 frame. Use a clearly visible consenting human performer; animal and multi-identity motion are not established by this workflow.

The prepared photo is fitted into the selected reference frame without stretching. At 720p the quote reserves 1 credit per rounded second; at 1080p it reserves 2. A 10-second clip therefore reserves 10 or 20 credits. There is no free generation allowance. The server rejects a reference whose inspected duration or frame differs from the submitted quote.

Selection and Save preparation brief stay local. Generate uploads both references to private site storage and the AI provider for processing. Only submit references you are permitted to share for that purpose. An uncertain provider submission is held for review instead of creating another potentially billed task.

Choose a motion reference with one clear lead

Begin with one person and a movement you can describe in a sentence. A small shoulder bounce followed by a hand gesture is easier to inspect than a fast routine with frequent camera cuts. Keep the head, shoulders, and torso visible throughout the part you intend to use.

If somebody crosses in front of the performer, watch what happens at the exact crossing. The reference may temporarily lose the body part you care about. For a first comparison, record a clean alternative in which the person stays visible. This is an editorial recommendation for reducing ambiguity, not a measured model success rate.

Record a practical freestyle reference

Put the camera on a stable support and leave room around the moving subject. Rehearse the beginning and ending so the action does not start halfway through a step. Choose a position that makes shoulder and arm movement easy to see without dramatic perspective changes.

Record an ordinary performance without relying on a famous recording as the source. You can create your own rhythm and gestures. If you include music, keep track of its permission separately from the video and the performer’s consent. A motion reference that is suitable visually may still contain audio you should not redistribute.

1. 1. Define one action and the body region it needs.
2. 2. Frame one performer with room for the whole movement.
3. 3. Record a steady beginning, the action, and a calm ending.
4. 4. Trim an uninterrupted section and review it at normal speed.
5. 5. Save a permission note, duration, and filename with the character image.

Read Kie motion-control requirements carefully

Kie documents one character image and one driving video for each motion-control request. Its video formats include MP4 and QuickTime, with a one-hundred-megabyte limit. The supported reference duration depends on character orientation: the product page describes up to ten seconds when following the image orientation and up to thirty when following the video.

Output modes are 720p and 1080p. These are provider options, not verified exports from this site. Official sources disagree on minimum dimensions, so the template implementation must reconcile those rules before submission. A conservative preparation choice is to keep dimensions above 340 pixels; an exact input acceptance has not been tested here.

Choose what should control the orientation

Character orientation is a different decision from crop. Following the reference video is useful when the action depends on how the performer turns. Following the image can suit an idea that should retain the picture’s orientation, subject to the provider’s shorter reference-duration limit.

Do not treat this setting as a way to preserve every background element from a viral recording. Motion transfer and exact scene replacement are separate promises. Keep the intended result narrow enough that you can compare the subject’s movement without also demanding a copied crowd, camera path, and lighting change.

A short reference storyboard you can record

This example contains one continuous action and no dependence on a named artist. Match it to a photograph with similar visible body framing. Avoid putting gestures in the prompt that contradict what happens in the reference.

Start with a neutral adult performer facing the camera. Raise the right shoulder gently, return to center, then make one small outward hand gesture. Keep the camera still and the full upper body visible. Use this recorded action as the motion reference for an original freestyle scene.

Reject a confusing clip before a paid attempt

Watch the first frame, midpoint, and last frame. Check whether the subject remains large enough, whether the frame changes shape, and whether a cut switches to another person. Note any occlusion or sharp camera movement rather than assuming an AI prompt can remove it.

If the reference feels unclear even to a human viewer, record a simpler one. Keep the rejected clip for comparison if useful, but do not silently submit multiple paid variants. A clear local preparation decision is progress; it does not mean generation, playback, or publication has been verified.

Questions about this guide