{ "id": "07824bbb-6672-4bb0-ac36-4313a519e35b", "revision": 0, "last_node_id": 456, "last_link_id": 798, "nodes": [ { "id": 407, "type": "MarkdownNote", "pos": [ 1360, 6550 ], "size": [ 600, 1280 ], "flags": {}, "order": 0, "mode": 0, "inputs": [], "outputs": [], "title": "Note: About LTX-2.5", "properties": { "ue_properties": { "widget_ue_connectable": {}, "version": "7.8", "input_ue_unconnectable": {} } }, "widgets_values": [ "# 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** : a lightweight model that expands short prompts into rich cinematic instructions at near-zero extra compute\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 | Toggle the built-in Prompt Enhancer: expands short prompts into rich cinematic instructions at near-zero extra compute |\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\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" ], "color": "#222", "bgcolor": "#000" }, { "id": 408, "type": "MarkdownNote", "pos": [ 810, 6550 ], "size": [ 510, 810 ], "flags": {}, "order": 1, "mode": 0, "inputs": [], "outputs": [], "title": "Note: Model Links", "properties": { "ue_properties": { "widget_ue_connectable": {}, "version": "7.8", "input_ue_unconnectable": {} } }, "widgets_values": [ "Guide: [Subgraph](https://docs.comfy.org/interface/features/subgraph)\n\n## Model Links\n\n**text_encoders**\n\n- [gemma4_e2b_it_bf16.safetensors](https://huggingface.co/Comfy-Org/gemma-4/resolve/main/text_encoders/gemma4_e2b_it_bf16.safetensors)\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_bf16.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" ], "color": "#222", "bgcolor": "#000" }, { "id": 412, "type": "MarkdownNote", "pos": [ 800, 6400 ], "size": [ 340, 90 ], "flags": {}, "order": 2, "mode": 0, "inputs": [], "outputs": [], "title": "Note: Model Links", "properties": { "ue_properties": { "widget_ue_connectable": {}, "version": "7.8", "input_ue_unconnectable": {} } }, "widgets_values": [ "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." ], "color": "#432", "bgcolor": "#653" }, { "id": 409, "type": "ResolutionSelector", "pos": [ 2095.0395265930197, 6736.032769556263 ], "size": [ 270, 170 ], "flags": {}, "order": 3, "mode": 0, "showAdvanced": false, "inputs": [], "outputs": [ { "name": "width", "type": "INT", "links": [ 792 ] }, { "name": "height", "type": "INT", "links": [ 793 ] } ], "properties": { "cnr_id": "comfy-core", "ver": "0.30.0", "Node name for S&R": "ResolutionSelector", "ue_properties": { "widget_ue_connectable": {}, "version": "7.8", "input_ue_unconnectable": {} } }, "widgets_values": [ "16:9 (Widescreen)", 1.5, 32 ] }, { "id": 411, "type": "MarkdownNote", "pos": [ 2062.5716767719637, 6984.65242074464 ], "size": [ 300, 520 ], "flags": {}, "order": 4, "mode": 0, "inputs": [], "outputs": [], "title": "Note: Size Settings Reference", "properties": { "ue_properties": { "widget_ue_connectable": {}, "version": "7.8", "input_ue_unconnectable": {} } }, "widgets_values": [ "| 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| 0.98 | 16:9 | 1344 x 768 |\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" ], "color": "#222", "bgcolor": "#000" }, { "id": 75, "type": "SaveVideo", "pos": [ 3117.5618284921284, 6614.717277176102 ], "size": [ 740, 106 ], "flags": { "collapsed": false }, "order": 6, "mode": 4, "inputs": [ { "name": "video", "type": "VIDEO", "link": 774 } ], "outputs": [ { "name": "video", "type": "VIDEO", "links": null } ], "properties": { "cnr_id": "comfy-core", "ver": "0.5.1", "Node name for S&R": "SaveVideo", "enableTabs": false, "tabWidth": 65, "tabXOffset": 10, "hasSecondTab": false, "secondTabText": "Send Back", "secondTabOffset": 80, "secondTabWidth": 65, "ue_properties": { "widget_ue_connectable": {}, "version": "7.7", "input_ue_unconnectable": {} } }, "widgets_values": [ "video/LTX_2.5_t2v", "auto", "auto" ], "color": "#009933" }, { "id": 405, "type": "8b4f085c-1bb3-4ecd-aeed-603a8d6d3970", "pos": [ 2480, 6550 ], "size": [ 578.64255423847, 587.903860641437 ], "flags": {}, "order": 5, "mode": 0, "inputs": [ { "label": "prompt", "name": "text", "type": "STRING", "widget": { "name": "text" }, "link": null }, { "label": "prompt_enhance", "name": "value", "type": "BOOLEAN", "widget": { "name": "value" }, "link": null }, { "label": "duration", "name": "value_1", "type": "INT", "widget": { "name": "value_1" }, "link": null }, { "label": "width", "name": "value_2", "type": "INT", "widget": { "name": "value_2" }, "link": 792 }, { "label": "height", "name": "value_3", "type": "INT", "widget": { "name": "value_3" }, "link": 793 }, { "label": "seed", "name": "noise_seed", "type": "INT", "widget": { "name": "noise_seed" }, "link": null }, { "label": "frame_rate", "name": "value_4", "type": "INT", "widget": { "name": "value_4" }, "link": null }, { "label": "video_vae", "name": "vae_name", "type": "COMBO", "widget": { "name": "vae_name" }, "link": null }, { "label": "audio_vae", "name": "vae_name_1", "type": "COMBO", "widget": { "name": "vae_name_1" }, "link": null }, { "label": "upscale_model", "name": "model_name", "type": "COMBO", "widget": { "name": "model_name" }, "link": null }, { "label": "prompt_enhance_model", "name": "clip_name_1", "type": "COMBO", "widget": { "name": "clip_name_1" }, "link": null } ], "outputs": [ { "name": "VIDEO", "type": "VIDEO", "links": [ 774 ] } ], "properties": { "cnr_id": "comfy-core", "ver": "0.30.0", "previewExposures": [], "ue_properties": { "widget_ue_connectable": { "text": true, "value": true, "value_1": true, "value_2": true, "value_3": true, "noise_seed": true, "value_4": true, "vae_name": true, "vae_name_1": true, "model_name": true, "clip_name_1": true }, "version": "7.8", "input_ue_unconnectable": {} } }, "widgets_values": [ "A young female samurai in a dark navy kimono and crimson sash walks alone through a quiet snow-covered mountain village at night, carrying a small paper lantern while gentle snow falls around her and warm light glows from distant wooden houses. The camera follows slowly behind her at waist height as her footsteps leave a trail in the untouched snow, with tall cedar trees and a massive moonlit mountain rising through the mist behind the village. She notices a tiny blue glowing butterfly resting on the snow beside the path and stops, lowering her lantern as the camera slowly moves around her into a side profile. The butterfly rises into the air and begins floating toward an old abandoned shrine at the edge of the village, leaving a faint trail of blue particles behind it. She quietly follows it as the camera tracks backward in front of her, revealing the shrine gradually emerging from the fog. The butterfly flies toward an ancient stone lantern beside the shrine and disappears inside it, causing the lantern to suddenly ignite with a soft blue flame. The samurai stops in front of the glowing lantern and gently smiles as hundreds of tiny blue lights awaken throughout the dark forest behind her. The camera slowly pulls back to reveal the woman standing alone beneath the enormous moon, surrounded by glowing lanterns, falling snow, misty mountains, and a forest filled with magical blue lights. Elegant cinematic anime fantasy, detailed hand-painted environments, beautiful character animation, soft moonlight, warm lantern glow, volumetric mist, delicate snow particles, rich navy and crimson colors, atmospheric depth, subtle film grain, polished feature-film animation, calm magical pacing.\n", false, 20, 1280, 720, 1016784490123495, 24, "ltx-2.5-22b-distilled-transformer-comfy-int8-convrot.safetensors", "ltx-2.5-video-vae-bf16.safetensors", "ltx-2.5-audio-vae-bf16.safetensors", "gemma4-12b-with-proj-ltx-2.5-comfy-int8-convrot.safetensors", "ltx-2.5-latent-spatial-upscaler-x2-bf16-1.0.safetensors", "gemma4_e2b_it_bf16.safetensors" ] } ], "links": [ [ 774, 405, 0, 75, 0, "VIDEO" ], [ 792, 409, 0, 405, 3, "INT" ], [ 793, 409, 1, 405, 4, "INT" ] ], "groups": [], "definitions": { "subgraphs": [ { "id": "8b4f085c-1bb3-4ecd-aeed-603a8d6d3970", "version": 1, "state": { "lastGroupId": 27, "lastNodeId": 456, "lastLinkId": 798, "lastRerouteId": 0 }, "revision": 0, "config": {}, "name": 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