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These will not be used until you select one of the options below anyway.\n\n### **enhance_prompt** = AI prompt automatic enhancement **(currently bugged)**\n### **enable_last_frame** = Use start and end frame\n\n### **fps** = Use range from 24 - 48 frames per second\n### **seconds** = Define video duration in seconds\n### **single_pass** = Use single run without upscaler.\n### **native_resolution** = Render at native resolution instead of half resolution which is LTX default mode. This significantly increases demand and resources, so use with caution!\n### **nvidia_super_upscale** = Will upscale output resolution x2 at the final video save output.\n\n### Recommended steps:\n- Workflow is locked to 8 steps as per default in distilled mode.\n\n### Recommended resolutions:\n- The workflow will take the video input resolution (divided by 2) by default or when running with single_pass.\n- To run in real native resolution, set the native_resolution to ON, but this will significantly consume a lot more resources, especially for 1080p videos.\n- To match exact video details with extension, it's best to run in single_pass mode.\n- If you need to change the input resolution, enable the node. Most optimal resolution in this case is 960 x 544 pixels.\n\n### INSTRUCTIONS:\n\n1.) Use the Load Video Upload node to load a clip\n\n2.) On the same node, use **frame_load_cap** option to set last frames amount like 49 or 97.\n\n3.) Use **skip_first_frames** option on the same node to fast forward to the desired starting point.\n\n4.) Enter the desired extension duration in the **extended_clip_duration**.\n\n5.) Choose running options and click RUN. You will get 2 videos. One is the extended video with a part from the original video included and a cut version which only includes the extended part. The extended clip duration time is for the combined clip, not the cut version.\n\n## This workflow requires Comfy version 0.17 (or newer) to work properly.\n\n### Width & height settings must be divisible by 32 + 1. \n### Frame count must be divisible by 8 + 1, but this is now automatically handled by the workflow. Simply input video length in seconds and fps.\n\n### Running with invalid parameters **will not cause errors**. Instead, the flow will silently choose the closest valid parameters. \n\n### By default, we are using 720p resolution. You can try 1920*1088 if you have a powerful GPU.\n" ], "color": "#223", "bgcolor": "#335" }, { "id": 103, "type": "MarkdownNote", "pos": [ -2482.0639279137645, 2309.787178996324 ], "size": [ 914.21875, 1280.0625 ], "flags": {}, "order": 3, "mode": 0, "inputs": [], "outputs": [], "title": "Model Links", "properties": {}, "widgets_values": [ "- Huggingface: [Lightricks/LTX-2.3](https://huggingface.co/Lightricks/LTX-2.3/)\n- Github: [LTX-2](https://github.com/Lightricks/LTX-2)\n\n## LTX-2.3 Prompting Tips\n\n1. **Core Actions**: Describe events and actions as they occur over time \n2. **Visual Details**: Describe all visual details you want to appear in the video \n3. **Audio**: Describe sounds and dialogue needed for the scene\n\n## Report LTX-2.3 Issues\nTo report any issues when running this workflow, [go to GitHub](https://github.com/Lightricks/ComfyUI-LTXVideo/issues)\n\n## Model Links (for Local Users)\n\n**latent_upscale_models**\n\n- [ltx-2.3-spatial-upscaler-x2-1.1.safetensors](https://huggingface.co/Lightricks/LTX-2.3/resolve/main/ltx-2.3-spatial-upscaler-x2-1.1.safetensors)\n\n**checkpoints (pick one of these depending on your hardware capability)**\n\n- BF16: [ltx-2.3-22b-dev.safetensors](https://huggingface.co/Lightricks/LTX-2.3/resolve/main/ltx-2.3-22b-dev.safetensors)\n- FP8: [ltx-2.3-22b-dev-fp8.safetensors](https://huggingface.co/Lightricks/LTX-2.3-fp8/resolve/main/ltx-2.3-22b-dev-fp8.safetensors)\n\n**loras**\n\n- [ltx-2.3-22b-distilled-lora-384-1.1.safetensors](https://huggingface.co/Lightricks/LTX-2.3/resolve/main/ltx-2.3-22b-distilled-lora-384-1.1.safetensors)\n\n**text_encoders**\n\n- [gemma_3_12B_it_fp4_mixed.safetensors](https://huggingface.co/Comfy-Org/ltx-2/resolve/main/split_files/text_encoders/gemma_3_12B_it_fp4_mixed.safetensors)\n\n**vae (for render previews)**\n- [taeltx2_3.safetensors](https://huggingface.co/Kijai/LTX2.3_comfy/resolve/main/vae/taeltx2_3.safetensors)\n## Model Storage Location\n\n```\nšŸ“‚ ComfyUI/\nā”œā”€ā”€ šŸ“‚ models/\n│ ā”œā”€ā”€ šŸ“‚ latent_upscale_models/\n│ │ └── ltx-2.3-spatial-upscaler-x2-1.1.safetensors\n│ ā”œā”€ā”€ šŸ“‚ checkpoints/\n│ │ ā”œā”€ā”€ ltx-2.3-22b-dev-fp8.safetensors\n│ │ └── ltx-2.3-22b-dev.safetensors\n│ ā”œā”€ā”€ šŸ“‚ loras/\n│ │ └── ltx-2.3-22b-distilled-lora-384-1.1.safetensors\n│ ā”œā”€ā”€ šŸ“‚ text_encoders/\n│ │ └── gemma_3_12B_it_fp4_mixed.safetensors\n│ ā”œā”€ā”€ šŸ“‚ vae/\n│   │ └── taeltx2_3.safetensors\n```\n\n## Report other issues\n\nNote: please update ComfyUI first ([guide](https://docs.comfy.org/installation/update_comfyui)) and prepare required models. Desktop/Cloud will be update after the stable builds; nightly-supported models may not be included yet, please wait for the update.\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)" ], "color": "#223", "bgcolor": "#335" }, { "id": 375, "type": "LoadImage", "pos": [ 507.30914168647996, 2309.8133355775744 ], "size": [ 685.875, 710.859375 ], "flags": {}, "order": 4, "mode": 0, "inputs": [], "outputs": [ { "name": "IMAGE", "type": "IMAGE", "links": [ 1079 ] }, { "name": "MASK", "type": "MASK", "links": null } ], "title": "LAST FRAME (END)", "properties": { "cnr_id": "comfy-core", "ver": "0.16.3", "Node name for S&R": "LoadImage", "enableTabs": false, "tabWidth": 65, "tabXOffset": 10, "hasSecondTab": false, "secondTabText": "Send 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"name": "value_7", "type": "BOOLEAN", "widget": { "name": "value_7" }, "link": null }, { "label": "sampler_name", "name": "sampler_name", "type": "COMBO", "widget": { "name": "sampler_name" }, "link": null }, { "label": "nvidia_super_upscale", "name": "value_5", "type": "BOOLEAN", "widget": { "name": "value_5" }, "link": null }, { "label": "custom_lora", "name": "lora", "type": "LORA", "link": 1053 }, { "name": "audio", "type": "AUDIO", "link": 1049 }, { "name": "video_info", "type": "VHS_VIDEOINFO", "link": 1052 }, { "label": "extended_clip_duration", "name": "value_2", "type": "INT", "widget": { "name": "value_2" }, "link": null }, { "label": "Last Frame", "name": "images", "type": "IMAGE", "link": 1079 }, { "label": "enable_last_frame", "name": "value_3", "type": "BOOLEAN", "widget": { "name": "value_3" }, "link": null }, { "label": "distilled_mode", "name": "value_4", "type": "BOOLEAN", "widget": { "name": "value_4" }, "link": null }, { "label": "single_pass", "name": "value_6", 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