VIDEO

自然なImage-to-Videoモーション

動画の長さではなく、人物の外見・演技、環境の反応、カメラ経路を具体的に指定します。人物がいない場面では空間の動きとカメラ演出に集中します。

PROMPT
Use the supplied first-frame image as the visual source of truth. Do not redescribe or redesign what is already visible. Create one continuous, physically coherent shot.

MOVING SUBJECT OR FOCAL ELEMENT
{{moving_subject}}
If a person is present, preserve the same face, apparent age, body proportions, hairstyle, clothing, accessories, initial pose, and screen position. If there is no person, explicitly treat the named object, landscape feature, weather system, or light source as the focal element.

SUBJECT PERFORMANCE
{{subject_action}}
Describe one primary action with a readable beginning, transition, and resting state. For a person, include gaze, facial expression, breathing, weight shift, hand behavior, and interaction with the environment. For a person-free background shot, describe only the focal element’s natural change and omit human performance.

ENVIRONMENTAL MOTION
{{environment_motion}}
Describe how hair, fabric, foliage, dust, water, smoke, reflections, shadows, practical lights, and background traffic react consistently to the subject and wind. Use restrained secondary motion; nothing moves without a cause.

CAMERA
{{camera_motion}}
Define framing, angle, camera support, one motivated move, subject relationship, focus behavior, and the point where the camera settles. Avoid combining contradictory moves.

LOOK AND MOTION CHARACTER
{{style}}
Specify live action or animation language, lighting continuity, color grade, lens response, motion energy, and whether movement feels smooth, handheld, weighty, delicate, or urgent.

CONTINUITY CONSTRAINTS
{{constraints}}
Maintain identity, anatomy, object geometry, screen direction, scale, lighting direction, and background layout. No morphing, flicker, teleportation, duplicate elements, sliding feet, rubbery limbs, sudden zooms, or unmotivated cuts.

Negative prompt

identity drift, face mutation, age change, wardrobe change, warped anatomy, rubbery limbs, sliding feet, floating contact, object morphing, duplicate subjects, disappearing props, geometry drift, flicker, exposure pumping, texture crawl, background warping, teleportation, abrupt zoom, unmotivated cut, camera jitter, reversed screen direction, text, subtitles, logo, watermark

制作手順

  1. 被写体とシーンを先に定義し、次にカメラ、照明、スタイルを入力します。
  2. 最初の結果では人物同一性、形状、構図、主動作を確認します。
  3. 反復ごとに動作またはカメラ指示を一つだけ変更します。

動画プロンプトの原則

  • 動画の長さは生成設定で選び、プロンプト変数には入力しません。
  • 人物がいる場合は外見、表情、視線、姿勢、重心移動、手の動き、終了状態を記述します。
  • 人物がいない場合は前景・中景・背景の動きとカメラ経路を中心にします。
  • Image-to-Videoでは画像が外見を決めるため、テキストは動きを優先します。
  • 1クリップにつき主動作一つ、動機のあるカメラ移動一つから始めます。

検証

顔、手、製品形状、接地、画面方向、光、背景位置、ちらつき、フレーム間変形を確認します。