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provided start image as the first frame and the provided end image as the final frame anchor. The video opens on the back of the robotic hand, four fingers slightly curled, joints glowing faintly in the darkness, a low electrical hum filling the space. The hand rotates slowly at the wrist, turning from the back view toward the palm side, the four visible fingers uncurling gently one by one, starting with the index finger, then the middle, ring, and pinky, each joint clicking softly. As the palm turns upward, the thumb swings out from the side of the hand into view, clearly separate from the four fingers, all five fingers spreading open. A blue energy crystal fades into existence above the palm, its hum rising into a resonant tone, thin energy threads coiling around it, particles crackling softly as they spiral away like sparks. The crystal rotates slowly, hovering above the fully open hand, light spilling between the five spread fingers, the crystal's steady hum filling the silence as the video ends on the open palm with the glowing crystal.\n", true, 5, 1280, 720, 873293130933086, 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", "gemma4_e2b_it_bf16.safetensors" ], "widgets_values_named": { "clip_name": "gemma4-12b-with-proj-ltx-2.5-comfy-int8-convrot.safetensors", "clip_name_1": "gemma4_e2b_it_bf16.safetensors", "noise_seed": 873293130933086, "unet_name": "ltx-2.5-22b-distilled-transformer-comfy-int8-convrot.safetensors", "vae_name": "ltx-2.5-video-vae-bf16.safetensors", "vae_name_1": "ltx-2.5-audio-vae-bf16.safetensors", "value": "Use the provided start image as the first frame and the provided end image as the final frame anchor. The video opens on the back of the robotic hand, four fingers slightly curled, joints glowing faintly in the darkness, a low electrical hum filling the space. The hand rotates slowly at the wrist, turning from the back view toward the palm side, the four visible fingers uncurling gently one by one, starting with the index finger, then the middle, ring, and pinky, each joint clicking softly. As the palm turns upward, the thumb swings out from the side of the hand into view, clearly separate from the four fingers, all five fingers spreading open. A blue energy crystal fades into existence above the palm, its hum rising into a resonant tone, thin energy threads coiling around it, particles crackling softly as they spiral away like sparks. The crystal rotates slowly, hovering above the fully open hand, light spilling between the five spread fingers, the crystal's steady hum filling the silence as the video ends on the open palm with the glowing crystal.\n", "value_1": true, "value_2": 5, "value_3": 1280, "value_4": 720, "value_5": 24 } }, { "bgcolor": "#000", "color": "#222", "flags": {}, "id": 254, "inputs": [], "mode": 0, "order": 2, "outputs": [], "pos": [ 790, 2310 ], "properties": {}, "size": [ 440, 1640 ], "title": "Note: About LTX-2.5", "type": "MarkdownNote", "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 **First & Last Frame** workflow interpolates between two images. Load a first and a last frame, and the model generates the connected shots in between : holding character, environment, lighting, and style across the transition, with synchronized audio.\n\n## Subgraph parameters\n\nThe **First & Last Frame 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| first_frame | Starting image of the transition (load your own image in **Load First Frame**) |\n| last_frame | Ending image of the transition (load your own image in **Load Last Frame**) |\n| prompt | Text prompt describing the motion, scene, 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| 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. Replace the images in **Load First Frame** and **Load Last Frame** with your own start/end frames\n3. Write a prompt describing the transition, optionally toggle **prompt_enhance** for short prompts\n4. Set **duration** / **width** / **height** / **frame_rate** (defaults work well) and hit **Queue**\n5. 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" ], "widgets_values_named": { "text": "# 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 **First & Last Frame** workflow interpolates between two images. Load a first and a last frame, and the model generates the connected shots in between : holding character, environment, lighting, and style across the transition, with synchronized audio.\n\n## Subgraph parameters\n\nThe **First & Last Frame 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| first_frame | Starting image of the transition (load your own image in **Load First Frame**) |\n| last_frame | Ending image of the transition (load your own image in **Load Last Frame**) |\n| prompt | Text prompt describing the motion, scene, 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| 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. Replace the images in **Load First Frame** and **Load Last Frame** with your own start/end frames\n3. Write a prompt describing the transition, optionally toggle **prompt_enhance** for short prompts\n4. Set **duration** / **width** / **height** / **frame_rate** (defaults work well) and hit **Queue**\n5. 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" } } ], "revision": 0, "version": 0.4 }