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AI Video TechniquesAI Video Character Reference Framing: Match Portraits to Landscape Shots
Prepare vertical character portraits for landscape AI video by matching aspect ratio, body scale, headroom, floor space, and movement room before generation.
Prepare a character image for the final video shape before generation to create a landscape shot with readable body scale, stable headroom, and usable action space. AI video character reference framing is especially useful when a vertical full-body portrait must guide a horizontal scene.
Why the reference frame influences the first shot
A character reference carries more than identity. It also presents a camera distance, body scale, surrounding space, and visual balance. When a person fills most of a 9:16 portrait, those spatial cues can lead a 16:9 generation toward a tight crop even when the prompt requests a medium-wide composition.
The practical preparation step is simple: extend the portrait to the target aspect ratio, reduce the character to the intended screen height, and preserve enough floor, headroom, and side space for the planned action. The new frame then demonstrates both who the character is and how the shot should be composed.
Set the target occupancy before motion
Start by deciding how much of the landscape frame the person should occupy. A medium-wide scene usually needs the full body, visible floor, clear headroom, and open space in the direction of movement. Place important props inside that usable space so the reference establishes a visible path from the character to the action endpoint.
For the studio test, the vertical source showed a red-haired woman nearly filling the portrait. The prepared landscape version kept the same face, hair, ivory utility shirt, navy trousers, brown boots, window light, workbench, easel, and sketchbook. It reduced her scale and revealed more floor and horizontal studio space.
What the comparison showed
Both six-second videos used the same character, studio, action, prompt, model, duration, resolution, and audio setting. The woman was asked to move toward a workbench, lift a closed sketchbook, open it, and look at the pages. The only intended input change was the framing of the character reference.
The direct vertical-reference version opened with a tight crop around the torso and legs. The sampled opening and midpoint omitted the complete head, feet, floor, and much of the horizontal workspace. Its final image reconstructed a wider studio view, creating a large change in shot scale during the clip.
The prepared landscape-reference version began with the full body, headroom, floor, workbench, easel, and open side space already visible. Those elements remained readable at the midpoint and final image while the character picked up and opened the sketchbook. In this single Seedance 2.0 scene, the aligned reference produced the more stable landscape composition.
A repeatable preparation pattern
- Choose the output shape. Set the target video aspect ratio and intended shot size.
- Measure the character scale. Decide the approximate percentage of frame height occupied by the person.
- Extend the environment. Continue the existing room, floor, light, and perspective into the new canvas area.
- Reserve action space. Leave room between the character and the prop or destination.
- Lock identity and wardrobe. Preserve face structure, hair, age, body proportions, clothing, and accessories during expansion.
- Inspect the prepared image. Check for seams, duplicate limbs, extra people, altered clothes, and shifted camera height before video generation.
The prepared image should look like a plausible first frame from the intended video. Clear floor contact and consistent eye-level perspective help make character scale easy to evaluate.
Where this technique helps
A fashion creator can adapt a vertical model portrait into a horizontal showroom scene while preserving walking space beside a clothing rack. A product filmmaker can place a presenter at a smaller scale so a demonstration table and product remain visible together. A narrative editor can prepare a portrait character for a wide interior in which the actor must cross the room and interact with a door, desk, or window.
Each case begins with the same decision: the reference should demonstrate the composition required by the moving shot, not only the character identity.
Frequently asked questions
What should stay fixed during aspect-ratio expansion?
Keep the face, hair, age, body proportions, clothing, pose, camera height, lighting direction, and environmental style consistent.
How much space should remain around the character?
Preserve visible headroom and floor, then reserve side space along the direction of movement and around the main prop.
What should I inspect before generating the video?
Check the character scale, full-body visibility, floor contact, background continuity, prop position, clothing, hands, and extended-image boundaries.
How can I compare the result?
Review the opening, midpoint, and final images for body scale, crop stability, usable action space, background continuity, and completion of the intended movement.
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