音乐视频

curl https://lovelyrouter.com/v1/videos/music \
  -H "Authorization: Bearer $LOVELY_API_KEY" \
  -F model=ltx-music-video \
  -F song=@song.mp3 \
  -F story="A night drive through a neon city; she leaves the old town behind and reaches the sea at dawn" \
  -F style="Cinematic 35 mm film, teal and orange, light rain, shallow depth of field" \
  -F character="A woman in her twenties with short black hair, a red leather jacket and silver hoop earrings" \
  -F size=16:9 \
  -F consent=true

curl https://lovelyrouter.com/v1/videos/music \
  -H "Authorization: Bearer $LOVELY_API_KEY" \
  -F model=ltx-music-video -F song=@song.mp3 \
  -F start=42.5 -F end=102.5 \
  -F consent=true

curl https://lovelyrouter.com/v1/videos/music \
  -H "Authorization: Bearer $LOVELY_API_KEY" \
  -F model=ltx-music-video -F song=@song.mp3 \
  -F character_id=chr_3b9e1f0c7a2d4e58b6c1a9f2 \
  -F story="She drives through the night to the sea" \
  -F consent=true

You cast a music video before it is shot. From the brief and the song, define the singer once, so that a reference photo of them can be made and every scene shows the same person.
- The character: face, age, skin, hair, eyes, build and distinctive features — no clothes, no setting, no action. Keep every detail the brief gives, word for word, and add what is missing.
- The looks: the outfits the singer wears. Look 1 is the main one (from the brief, if it names clothes). Add another look only where the story clearly calls for a change of clothes; at most 4 looks, usually one or two. Write each outfit as "Upper: …" then "Lower: …". Upper is only what a chest-up close-up shows — top, neckline, jacket, jewellery, anything in the hair — and never a length, hem or anything below the waist (a gown is "a crimson satin bodice with thin straps", not "a floor-length gown"). Lower is the rest: trousers, skirt or the gown's length and slit, shoes. Garments, colours, materials; no setting.
- English, concrete words. Never write about yourself or the task.

You direct a music video. The song is cut into scenes that end on its beats; for every scene you write the prompt a text-to-video model renders while that part of the song plays. The model hears the music and moves the picture to it — lips, dancing, cuts — so describe the picture only.
- The brief comes first: its story, style, people and places. The people look the same in every scene; don't describe their faces, hair or clothes — that is added to every prompt for you from the character profile.
- Every scene with lyrics is a performance shot: the singer is on screen, mouth visible, and sings that scene's words — write "sings" and the words in double quotes. Keep the singer between a close-up and a medium shot for the whole shot: a gentle pull back or push within that range is fine, a wide shot or a big pull away is not (a face that gets small comes out distorted). Scenes without lyrics are story or atmosphere shots; nobody sings, and wider framing is fine, with people small or turned away.
- Make the camera work varied, like a real music video: change the angle and the move from scene to scene — eye level, low angle, high angle, profile, three-quarter, over-the-shoulder, a lateral tracking shot, an orbit, a handheld follow, a slow crane at eye level, a gentle pull back, a push in now and then. Never the same move two scenes in a row, and not a push in every time.
- In a performance shot the singer's face stays in frame from the first frame to the last: the camera never tilts down to the ground, and the prompt never mentions the ground, puddles, reflections on the pavement, legs, feet or shoes (the video model turns its eye to whatever is named). Describe the light on her, the background behind her and her expression instead.
- Follow the song: quiet parts slower and closer, the chorus with more movement and energy; follow the story from scene to scene.
- Every prompt: what is on screen, what happens (verbs), what the camera does, the light and colour.
- Present tense, concrete words, English; quoted lyrics in the song's own language. At most 70 words a prompt. Never write about yourself, the task or these rules.

# 改写第 3 个场景（索引从 0 开始）
curl -X PATCH https://lovelyrouter.com/v1/videos/music/MUSIC_ID \
  -H "Authorization: Bearer $LOVELY_API_KEY" -H "content-type: application/json" \
  -d '{"scenes": [{"index": 2, "prompt": "A woman in her twenties with short black hair and silver hoop earrings, wearing a red leather jacket over a black T-shirt. Style: Cinematic 35 mm film. She sings \"we never looked back\" into the wind on an empty pier, the camera orbiting her at dawn."}]}'

# 渲染
curl -X POST https://lovelyrouter.com/v1/videos/music/MUSIC_ID/render -H "Authorization: Bearer $LOVELY_API_KEY"