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LTX-2.5：文生视频

LTX-2.5：文生视频

LTX-2.5: Text to Video

使用LTX-2.5从文本提示词生成电影级视频，这是一个生产就绪的扩散模型，可输出单个视频文件，并支持可选的空间放大以增强分辨率。非常适合电影预可视化、商业故事板以及高容量内容创作流程。

视频 7 个节点 1,310 次使用 ComfyUI ≥ 0.32.0 ComfyUI 114 KB

下载工作流 JSON 查看官方来源

下载后把文件拖进 ComfyUI 窗口即可打开。

需要的权重

这个工作流引用了 8 个权重文件，其中 7 个能在本站模型库里找到。

gemma4-12b-with-proj-ltx-2.5-comfy-int8-convrot.safetensors 在模型库查看
gemma4_e2b_it_int8_convrot.safetensors 在模型库查看
ltx-2.5-22b-distilled-transformer-comfy-int8-convrot.safetensors 在模型库查看
ltx-2.5-audio-vae-bf16.safetensors 在模型库查看
ltx-2.5-latent-spatial-upscaler-x2-bf16-1.0.safetensors 在模型库查看
ltx-2.5-video-vae-bf16.safetensors 在模型库查看
ltx-av-step-1751000_vocoder_24K.safetensors 模型库暂未收录
model.safetensors 在模型库查看

节点构成

MarkdownNote × 4
SaveVideo × 1
8b4f085c-1bb3-4ecd-aeed-603a8d6d3970 × 1
ResolutionSelector × 1

官方标注的模型

LTX-2.5

工作流 JSON

和上面「下载工作流 JSON」是同一份文件。

1{
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3 "revision": 0,
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5 "last_link_id": 793,
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18 "flags": {
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22 "mode": 0,
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27 "link": 774
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30 "outputs": [
31 {
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33 "type": "VIDEO",
34 "links": null
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37 "properties": {
38 "cnr_id": "comfy-core",
39 "ver": "0.5.1",
40 "Node name for S&R": "SaveVideo",
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44 "hasSecondTab": false,
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51 "input_ue_unconnectable": []
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56 "auto",
57 "auto"
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59 },
60 {
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62 "type": "8b4f085c-1bb3-4ecd-aeed-603a8d6d3970",
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190 "A close-up of an Arctic hunter's face, his eyes fixed straight ahead, narrowed and locked on something in the far distance directly in front of him, frost dusting his dark beard, one hand slowly reaching toward the rifle slung on his back, his breath quick and shallow, the tension in his jaw visible even through the scarf. The camera slowly pulls back, revealing him crouched at the edge of an ice floe, and ahead of him, in the exact direction of his gaze, a polar bear moves slowly along a distant ice ridge, its pale coat blending into the white haze, facing toward him. The pull-back continues, the hunter in the foreground and the bear far ahead, the two facing each other across the dark lead of water, the ice field and grey sea stretching around them, seabirds wheeling overhead. Midway through the shot, the complete title \"LTX-2.5\" fades in large and centered, plain white sans-serif letters with wide spacing, no glow, no shadow, no ornament, the lettering large enough to dominate the center of the frame, emerging slowly from the mist, resting still and blending into the snowscape, with the hunter and the bear still visible below on either side of the title, staying through the end of the scene. The wind carries the distant sound of shifting ice, a single low growl rolling across the water.",
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199 "ltx-2.5-audio-vae-bf16.safetensors",
200 "gemma4-12b-with-proj-ltx-2.5-comfy-int8-convrot.safetensors",
201 "ltx-2.5-latent-spatial-upscaler-x2-bf16-1.0.safetensors",
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221 "title": "Note: About LTX-2.5",
222 "properties": [],
223 "widgets_values": [
224 "# LTX-2.5\n\nLTX-2.5 is Lightricks' open video generation model : fast, local-first, and built for production. Run it locally, fine-tune it for your own use case, or integrate it into your pipeline.\n\n**Key highlights:**\n\n- **Pixel Diffusion** : keyframes-first generation that builds every scene on a grid of high-fidelity keyframes for industry-leading pixel quality\n- **Diffusion Video Decoder** : sharper faces, legible text, fewer smears in fast motion\n- **Native multishot** : one generation yields multiple connected shots holding character, environment, lighting, voice, and style across cuts\n- **Custom Gemma 4 12B text encoder** : retains multiple subjects, actions, lighting, detail, and camera direction across complex prompts\n- **Dedicated Prompt Enhancer** *(optional)* : a lightweight model that expands short prompts into rich cinematic instructions\n- **Auto Duration** : predicts the right clip length from the described action before diffusion begins\n- **Better distilled model** : carries far more quality, prompt adherence, and motion into a smaller, faster variant\n- Carried over from LTX-2.3: native 4K, synchronized audio-video\n\nOfficial model & files: https://huggingface.co/Lightricks/LTX-2.5\n## What this workflow does\n\nThis **Text-to-Video** workflow generates a video directly from a text prompt. Write your prompt, optionally enable the Prompt Enhancer, and the model renders a clip with cinematic pixel quality and synchronized audio.\n\n## Subgraph parameters\n\nThe **Text to Video (LTX-2.5)** node is a subgraph. Click the **Enter subgraph** button at the bottom of the node to open its internal graph, where you can inspect and fine-tune every step of the pipeline (conditioning, sampler, CFG guider, VAE decode, and more).\n\n| Parameter | What it does |\n|---|---|\n| prompt | Text prompt describing the scene, action, lighting, camera, and style |\n| prompt_enhance | *(Optional, off by default)* Toggle the built-in Prompt Enhancer, which expands short prompts into rich cinematic instructions. Requires the separate prompt enhancer model (~10 GB) below and adds ~1-2 min of generation time |\n| duration | Clip length in seconds (Auto Duration can predict it from the action) |\n| width / height | Output resolution in pixels (e.g. 1280×720) |\n| seed | Random seed : set a fixed value to reproduce the same result |\n| frame_rate | Frames per second |\n| unet_name | Main model: LTX-2.5 distilled transformer (ltx-2.5-22b-distilled-transformer-comfy-int8-convrot.safetensors) |\n| video_vae | Video VAE used for decoding (ltx-2.5-video-vae-bf16.safetensors) |\n| audio_vae | Audio VAE that produces synchronized audio (ltx-2.5-audio-vae-bf16.safetensors) |\n| clip_name | Text encoder: custom Gemma 4 12B with projection (gemma4-12b-with-proj-ltx-2.5-comfy-int8-convrot.safetensors) |\n| upscale_model | Latent upscaler applied before decoding for higher-fidelity output |\n| prompt_enhance_model | Model checkpoint used by the Prompt Enhancer |\n\n## How to use\n\n1. Download the models listed in **Note: Model Links** and place them in ComfyUI's `models/` folder (the prompt enhancer model is optional - skip it unless you enable **prompt_enhance**)\n2. Write your prompt, optionally toggle **prompt_enhance** for short prompts\n3. Set **duration** / **width** / **height** / **frame_rate** (defaults work well) and hit **Queue**\n4. To dive deeper, click **Enter subgraph** at the bottom of the main node : every internal step (conditioning, sampler, CFG, VAE decode) can be edited there\n"
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240 "flags": [],
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243 "inputs": [],
244 "outputs": [],
245 "title": "Note: Model Links",
246 "properties": [],
247 "widgets_values": [
248 "Guide: [Subgraph](https://docs.comfy.org/interface/features/subgraph)\n\n## Model Links\n\n- [Hugging Face:Comfy-Org/gemma-4](https://huggingface.co/Comfy-Org/gemma-4)\n- [ModelScope:Comfy-Org/gemma-4](https://modelscope.cn/models/Comfy-Org/gemma-4)\n\n**text_encoders**\n\n- [gemma4_e2b_it_int8_convrot.safetensors](https://huggingface.co/Comfy-Org/gemma-4/resolve/main/text_encoders/gemma4_e2b_it_int8_convrot.safetensors) (4.84 GB) — *optional, only needed when **prompt_enhance** is enabled*\n- [gemma4-12b-with-proj-ltx-2.5-comfy-int8-convrot.safetensors](https://huggingface.co/Lightricks/LTX-2.5/resolve/main/text_encoders/gemma4-12b-with-proj-ltx-2.5-comfy-int8-convrot.safetensors)\n\n**diffusion_models**\n\n- [ltx-2.5-22b-distilled-transformer-comfy-int8-convrot.safetensors](https://huggingface.co/Lightricks/LTX-2.5/resolve/main/diffusion_models/ltx-2.5-22b-distilled-transformer-comfy-int8-convrot.safetensors)\n\n**vae**\n\n- [ltx-2.5-video-vae-bf16.safetensors](https://huggingface.co/Lightricks/LTX-2.5/resolve/main/vae/ltx-2.5-video-vae-bf16.safetensors)\n- [ltx-2.5-audio-vae-bf16.safetensors](https://huggingface.co/Lightricks/LTX-2.5/resolve/main/vae/ltx-2.5-audio-vae-bf16.safetensors)\n\n**latent_upscale_models**\n\n- [ltx-2.5-latent-spatial-upscaler-x2-bf16-1.0.safetensors](https://huggingface.co/Lightricks/LTX-2.5/resolve/main/latent_upscale_models/ltx-2.5-latent-spatial-upscaler-x2-bf16-1.0.safetensors)\n\n\n## Model Storage Location\n\n```\n📂 ComfyUI/\n├── 📂 models/\n│ ├── 📂 text_encoders/\n│ │ ├── gemma4_e2b_it_int8_convrot.safetensors\n│ │ └── gemma4-12b-with-proj-ltx-2.5-comfy-int8-convrot.safetensors\n│ ├── 📂 diffusion_models/\n│ │ └── ltx-2.5-22b-distilled-transformer-comfy-int8-convrot.safetensors\n│ ├── 📂 vae/\n│ │ ├── ltx-2.5-video-vae-bf16.safetensors\n│ │ └── ltx-2.5-audio-vae-bf16.safetensors\n│ └── 📂 latent_upscale_models/\n│ └── ltx-2.5-latent-spatial-upscaler-x2-bf16-1.0.safetensors\n```\n\n## Report Issue\n\nNote: Please update ComfyUI first ([guide](https://docs.comfy.org/installation/update_comfyui)) and prepare required models. Desktop/Cloud updates follow stable releases, so some nightly-supported models may not be available yet.\n\n- Cannot run / runtime errors: [ComfyUI/issues](https://github.com/comfyanonymous/ComfyUI/issues)\n- UI / frontend issues: [ComfyUI_frontend/issues](https://github.com/Comfy-Org/ComfyUI_frontend/issues)\n- Workflow issues: [workflow_templates/issues](https://github.com/Comfy-Org/workflow_templates/issues)\n"
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315 "| megapixels | Aspect | Output (multiple=32) |\n|---|---|---|\n| 0.2 | 16:9 | 608 x 352 |\n| 0.3 | 16:9 | 736 x 416 |\n| 0.4 | 16:9 | 864 x 480 |\n| 0.5 | 16:9 | 960 x 544 |\n| 0.6 | 16:9 | 1056 x 608 |\n| 0.7 | 16:9 | 1152 x 640 |\n| 0.8 | 16:9 | 1216 x 672 |\n| 0.9 | 16:9 | 1280 x 736 |\n| 1.0 | 16:9 | 1376 x 768 |\n| 1.2 | 16:9 | 1504 x 832 |\n| 1.5 | 16:9 | 1664 x 928 |\n| 1.8 | 16:9 | 1824 x 1024 |\n| 2.0 | 16:9 | 1920 x 1088 |\n"
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339 "Before you download all the models, please make sure you have granted access to [LTX-2.5](https://huggingface.co/Lightricks/LTX-2.5) first."
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