すべてのガイドに戻る
2026-01-12
テキストからAI動画を作成する方法
テキストから動画は、被写体 + モーション + カメラ + 照明 + スタイルを指定するプロンプトで最も効果的です。短いプロンプトから始め、時間を短く保ち、反復。
クイックステップ
1分以内で完了できる簡単なチェックリスト。
- 1テキストから動画ツールを開く。
- 2プロンプトを書く:被写体 + アクション + カメラムーブメント + 照明 + スタイル。
- 3アスペクト比を選択(Shortsは9:16、YouTubeは16:9)。
- 4よりクリーンなモーションのために短い時間を設定(5秒から始める)。
- 5生成してプロンプトを改良(一度に1つのことを変更)。
Tool options you can choose
Aspect ratio:16:99:164:33:41:121:99:21
Duration:2s–12s4s / 6s / 8s (Audio mode)
Resolution:480p720p1080p
- Options vary by version: Silent vs Audio.
チュートリアル例(プロンプトと設定付き)
以下の各例は、このガイド用に事前選択されています(ランダムではありません)。
Example 1
Cinematic neon rain (prompt → video)
Text-to-Videotext-to-video
How to use this example
- 1.Open the tool.
- 2.Choose mode: Text-to-Video.
- 3.No input file needed (prompt-only).
- 4.Use the keywords (or full prompt) and pick settings.
- 5.Generate and iterate (crop/lighting/prompt) if needed.
Prompt keywords
A cinematic realisma city alleyway in the night rainThe camera begins with a close-up of a puddle: raindrops create concentric ripplesThe camera slowly rises and slides forward (a low-angle push-up)A person in a dark trench coat walks past with their back to the camerathe edge of the coat is lifted by the windrevealing the fabric's texture clearlyTheir footsteps step into puddles
Show full prompt (copy)
A cinematic realism, a city alleyway in the night rain. The camera begins with a close-up of a puddle: raindrops create concentric ripples, and the red and blue reflections of neon signs are slightly distorted on the water's surface. The camera slowly rises and slides forward (a low-angle push-up), water splashing onto the front edge of the lens to create realistic wet halos and tiny droplets. A person in a dark trench coat walks past with their back to the camera; the edge of the coat is lifted by the wind, revealing the fabric's texture clearly. Their footsteps step into puddles, and the splashing water droplets shimmer like tiny silver fragments in the backlight of the streetlights. The background features slightly bokeh of neon lights and mist, with fine rain and fog floating in the air, and volumetric light beams passing through the alleyway to create visible pillars of light. The camera finally focuses on the figure's half-body silhouette from behind, neon light refracting colorful highlights on the raindrops—a tense, restrained, and cinematic atmosphere. Cinematography: 35mm cinema lens, shallow depth of field, realistic film texture, subtle grain and high dynamic range (HDR), high contrast while preserving shadow detail. Lighting: Neon main light + streetlight backlight, enhanced reflection from wet ground, highlights not overexposed. Movement: Stabilizer slider with slight handheld breathing feel. Color: Cool cyan base tone, accented with red/blue neon.
Settings (used in this example)
Example 2
Futuristic rooftop (prompt → video)
Text-to-Videotext-to-video
How to use this example
- 1.Open the tool.
- 2.Choose mode: Text-to-Video.
- 3.No input file needed (prompt-only).
- 4.Use the keywords (or full prompt) and pick settings.
- 5.Generate and iterate (crop/lighting/prompt) if needed.
Prompt keywords
cinematic blockbusterphotorealNighttime rooftop in a futuristic mega-city during light rainOpen on an extreme close-up of a gloved hand tightening a metal clasp—micro scratcheswet reflectionscrisp detailA distant siren glow pulses across the gloveNeon signs and traffic streams below form anamorphic bokeh
Show full prompt (copy)
cinematic blockbuster, photoreal. Nighttime rooftop in a futuristic mega-city during light rain. Open on an extreme close-up of a gloved hand tightening a metal clasp—micro scratches, wet reflections, crisp detail. A distant siren glow pulses across the glove. Camera whips upward into a smooth stabilized dolly push as the character steps to the edge of the roof. Neon signs and traffic streams below form anamorphic bokeh; rain streaks catch volumetric light beams from a hovering drone. The character turns slightly—only a silhouette—cloak fluttering in the wind, edges rim-lit by cyan and magenta neon. A massive holographic billboard flickers behind them, casting shifting light across drifting mist. End on a heroic wide shot: the figure stands against the skyline as a drone passes close to camera, lens flare blooms, and the city breathes with depth and scale. High dynamic range, rich contrast, fine film grain, premium color grade (cool shadows, warm highlights), smooth motion, no jitter.
Settings (used in this example)
ヒント
- モーションワード(プッシュイン、パン、スローダリー)は動画の感じを改善することが多い。
- シーンが揺れる場合は、カメラムーブメントを簡素化し、プロンプトを短くする。
- ドリフトを減らすために1つのメイン被写体を保つ。
よくある質問
なぜ動画がランダムまたは一貫性がないように見えるのですか?▼
プロンプトが長すぎるか競合している可能性があります。余分な詳細を削除し、単一の被写体とアクションを保つ。
カメラキーワードを使用すべきですか?▼
はい—カメラキーワードは映画的な品質を向上させることが多い(クローズアップ、35mm、浅い被写界深度)。
最適な時間は?▼
5秒から始める。短いクリップはよりクリーンに見え、反復しやすい。
生成する準備はできましたか?
ツールを開いて、上記のプロンプト/設定を再利用してください。