151 lines
9.5 KiB
Markdown
151 lines
9.5 KiB
Markdown
---
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name: LTX 提示词 Skill(可复用模板库)
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description: LTX-2.3 提示词完整 skill——四段式公式+权威规则+词表库+万能模板+正反例+实战验证记录,写 LTX prompt 直接查这份
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type: project
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---
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# LTX-2.3 提示词 Skill(2026-07-31 融合官方博客+社区+实战升级版)
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## 一句话定位
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LTX prompt 不是"动作清单",是"导演分镜描述"。LTX-2.3 对 prompt 极其敏感,**prompt 是出片效果的主战场**(爸爸判断 + 实测验证)。
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## 一、万能公式(四段式 + 3 运动 + 2 必写)
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```
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[主体/起始画面] + [核心动作时间流] + [镜头语言] + [氛围/环境]
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+ 三种运动:主体运动 + 镜头运动 + 环境运动(风/草/叶/光) ← 最容易漏
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+ 两个必写:节奏控制(slow/fluid/seamless) + 明确结束帧(Ends on...)
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```
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## 二、官方权威规则(LTX 官方博客 2026-07 更新 + LTX 团队指南)
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1. **Be More Specific——模型能扛住复杂**:2.3 文本连接器更强,具体化取胜,简化不再有帮助
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2. **Direct the Scene——像导演布景**:明确左右/前后/远近/朝向/主体间距("man stands on left, woman on right holding bicycle")
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3. **Describe Texture——写材质**:织物/毛发/表面处理/边缘细节("individual strands visible, backlight catching edge detail")
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4. **For I2V, Use Verbs——动词驱动**:谁动/什么动/怎么动/镜头做什么,不写模糊词
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5. **Avoid Static——避免静态图式 prompt**:prompt 读起来像静图,输出就像静图
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6. **单段落连续描述 + 现在时动词 + 4~8 个句子**
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7. **细节匹配镜头尺度**:特写写细节,全景写整体
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8. **I2V 铁律**:输入图已定义画面,prompt 只写"接下来怎么动"(transition from stillness to motion),别重复描述图里已有静态元素
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9. **长视频配长 prompt**:短 prompt 配长视频 = 模型乱填/赶动作
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## 三、词表库(直接抄)
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### 镜头语言
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Follows, Tracks, Pans across, Circles around, Tilts upward, Pushes in / pulls back, Overhead view, Handheld movement, Over-the-shoulder, Wide establishing shot, Static frame, slow dolly in, low angle, macro lens, shallow depth of field
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### 节奏/时间
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Slow motion, Time-lapse, Rapid cuts, Lingering shot, Continuous shot, Freeze-frame, Fade-in/out, Seamless transition, Sudden stop
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### 尺度
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Expansive/Epic(广), Intimate/Claustrophobic(近/压抑), Medium(中性)
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### 灯光
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Flickering candles, Neon glow, Natural sunlight, Dramatic shadows, backlit rim light, warm tungsten, cool blue ambient, golden hour, soft window light
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### 质感
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Rough stone, Smooth metal, Worn fabric, Glossy surfaces, weathered wood, matte finish
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### 氛围
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Fog, Rain, Dust, Smoke, Particles, mist, overcast
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### 色彩
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Vibrant, Muted, Monochromatic, High contrast, warm tones, cool tones, desaturated
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### 环境音(如需音频)
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Coffeeshop noise, Wind and rain, Forest ambience with birds, traffic hum, ocean waves
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## 四、负面词模板
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```
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static, frozen, no movement, flickering, jittery, choppy motion, morphing,
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deformed, twisted, contorted, distorted, blurry, low resolution, extra limbs,
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unnatural body, ugly, bad anatomy, disfigured, malformed, warped spine, watermark, text
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```
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(动作场景额外加:twisted/contorted/deformed/warped spine——压"扭曲不像生物")
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## 五、正反例
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### ❌ 动作清单(不连贯)
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"a kitten does a backflip, jumps high, somersaults, tumbles, lands on feet, dynamic motion"
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→ 干巴巴清单、无环境、无镜头、无节奏、无收尾
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### ✅ 教科书分镜(已验证,实测出片连贯)
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"Opening on a small fluffy orange kitten crouching low in a sunlit grass field, facing right, tail twitching as it gathers itself. The kitten springs upward off its hind legs, launching into the air, body stretching into a graceful backflip, spinning 360 degrees backwards mid-air with paws tucked, fur and grass blades drifting in the wind as it tumbles. It lands softly on all four feet in the grass, a tiny puff of dust rising, tail curling up. Static camera, shallow depth of field, warm golden-hour light, gentle breeze moving the grass throughout. Slow, fluid, seamless motion. High fidelity, detailed fur texture, stable movement. Ends on the kitten sitting upright, blinking calmly."
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## 六、万能模板(填空即用)
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```
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Opening on [主体+起始姿态+场景+朝向+细节]. The [主体] [动作1-起势], [动作2-腾空/核心动作], [动作3-姿态细节], while [环境运动]. The camera [镜头运动], [景深/构图]. [灯光/氛围], [色彩]. Slow, fluid, seamless motion. [质感/细节要求]. Ends on [收尾画面].
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```
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## 七、常见错误清单
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1. 无视觉线索的情感标签("sad/happy"→ 写"eyes widen, lips tremble")
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2. 场景过载(一个镜头堆 20 个元素 → 聚焦一个主导事件)
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3. 冲突指令("still lake + dramatic waves" 会混乱)
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4. 过度精确数字("2 degrees per second" → 自然语言)
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5. 复杂物理/混乱运动(一个镜头多种复杂相机运动+主体乱动)
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6. 纯风格词(dynamic/cinematic/epic 不驱动动作,动词才行)
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## 八、I2V vs T2V 关键区别
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- **T2V**:画面全靠 prompt 生成 → 要写全主体+动作+环境+灯光+镜头
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- **I2V**:画面已被输入图定义 → **只写"接下来怎么动"+怎么收尾**,别重复静态内容
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## 九、实战验证记录(2026-07-31 小猫后空翻系列)
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| 版本 | 方案 | 结果 |
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|---|---|---|
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| v1/v2 | IC-LoRA 轨迹 0.85 | 真翻但猫大 80%+,强插值有扭曲风险 |
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| prompttest | 教科书 prompt + 不叠轨迹 | 动作连贯、空中翻转清晰、收尾精准(验证 prompt 是主战场) |
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| **wide_backflip** | **Z-Image 远景小图 + 教科书 prompt + 不叠轨迹 + 动作降难度(gentle flip)** | **猫小居中 ✅ 动作自然不扭曲 ✅ 环境运动 ✅ 收尾精准 ✅(最佳版)** |
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**结论沉淀**:
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- 猫大 → 用 Z-Image(Qwen3-4B) 生成"远景小主体"起始图,从源头治(比 SDXL 听话)
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- 动作扭曲 → 不叠 IC-LoRA,纯教科书 prompt + 动作降难度(spins gently while flipping 而非硬性 360°)+ 负面词压 twisted/contorted
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- 环境运动 → 官方强调的"画面活着"锚点,最容易漏
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**Why:** 爸爸要求"多去网上搜索学习他们的提示词写法,封装形成我们自己的 skill"——这是融合官方博客(ltx.io 2026-07 更新)+LTX团队指南(ltxworkflow)+中文指南(zimage.run)+两次实战验证的完整可复用 skill。
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**How to apply:** 写任何 LTX prompt 前先查这份:套万能公式、查词表、对照常见错误、参考正反例。I2V 用"只写怎么动+收尾"铁律。封装好长期复用。
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## 六、大模型辅助生成提示词(爸爸指定做法:先喂论文级高质量提示词)
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> 社区已验证做法:先用大模型(Gemma/Llama/Qwen 等)生成"论文级/电影级"的提示词,
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> 再喂给 LTX,遵从度和画面质量显著提升。**这比手写 prompt 更接近官方训练分布。**
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### 6.1 文生视频:导演式生成模板(喂给大模型的指令)
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```
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"请作为专业的电影导演,为 LTX-2.3 撰写一个场景描述。要求:50字以上,
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包含具体的 4K 细节、明确的运镜手法(如 Dolly Zoom/慢速推镜)、
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以及场景风格的光影氛围。主体是 [一句话描述]。"
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```
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### 6.2 图生视频:反推 + 运动分量(I2V 进阶)
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```
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第1步 反推:请用一段话详细描述这张图片(主体/姿势/环境/光线/构图),保留图片特征。
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第2步 加运动:在上面描述基础上,增加"接下来怎么动"的运动分量(Motion Prompt),
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包括:主体动作时间流 + 镜头运动 + 环境运动(风/草/光变化)+ 明确结束帧。
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要求只用现在时动词,不写动态/cinematic 等空泛词。
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```
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### 6.3 喂法要点(社区共识)
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- 生成后**人工检查一遍**:动作是否单一路径、有无运动冲突(如"跑得快"+"站着不动"同现)
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- I2V 提醒大模型"输入图是第一帧",别生成与图冲突的内容
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- 一次生成 2~3 版备选,挑动作路径最清晰的用
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## 七、实测万能模板库(CSDN 2026-04 + jishuzhan 2026-05 实测模板,直接抄)
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### 场景A 绝美自然风光(长曝光质感)
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```
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A wide-angle drone shot of a glowing bioluminescent forest at night,
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waterfalls flowing like liquid silver, cinematic slow motion,
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4k resolution, ethereal lighting.
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```
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### 场景B 赛博朋克人物(高精细节)
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```
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A close-up of a futuristic robot's head, mechanical eyes blinking and scanning,
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steam emitting from vents, neon city reflections on its metal surface,
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static camera, high detail.
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```
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### 场景C 粒子消散特效(测模型极限)
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```
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A golden sand sculpture of a lion, slowly dissolving into dust and blowing away
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in the wind, highly detailed sand particles, dramatic side lighting,
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120fps slow motion.
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```
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### 场景D 动物奔跑(电影级)
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```
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A hyper-realistic cinematic shot, slow camera tracking of a golden retriever
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running through a lavender field, sunlight filtering through trees creating
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soft bokeh, 4k, high frame rate 48fps.
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```
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## 八、避坑清单(CSDN 实测)
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1. **拒绝模糊词**:beautiful / good quality 对 LTX 几乎无效,浪费 token
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2. **运动冲突**:不要同句写 running fast + standing still → 剧烈闪烁
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3. **负向提示词必加**:blurry, distorted, low resolution, deformed limbs
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4. **参数联动**:动作流畅(奔跑/打斗)用 48-50fps,电影感用 24-25fps;先 1080p 草稿,满意再 4K
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5. **I2V 提示词与图片冲突是最常见的坑**:先反推图片再写 Motion Prompt(见 6.2)
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