<h3 id="ltx-2.5-int8-generative-video-upscaler-clean-comfyui-workflow"># LTX 2.5 INT8 Generative Video Upscaler — Clean ComfyUI Workflow</h3>A compact, independently assembled ComfyUI workflow for generatively upscaling an existing video with Lightricks' official LTX 2.5 Pixel Spatial Upscaler IC-LoRA and the INT8 ConvRot transformer.## Highlights- Video input only — no separate image input- No prompt or text encoder at runtime- Preserves the source audio- Automatic source size, FPS, frame-count, and audio analysis- <code>1.5x / 2.0x / 2.5x / 3.0x</code> scale dropdown- Automatic output sizing to multiples of 64- INT8 ConvRot transformer- Official Pixel Spatial Upscaler <code>x2</code> IC-LoRA- 8 distilled steps, CFG 1, Euler ancestral- SageAttention and tiled decode for practical VRAM use- Clean grouped UI with the implementation hidden in subgraphs<code>2.0x</code> is the adapter's trained target. The other scale options are experimental canvas sizes using the same <code>x2</code> adapter; larger values may invent detail and need more VRAM/time.## Required downloadsModels are not included. Install the official LTX 2.5 INT8 transformer, Conv video VAE, audio VAE, and Pixel Spatial Upscaler IC-LoRA from:- <a target="_blank" rel="ugc" href="https://huggingface.co/Lightricks/LTX-2.5">https://huggingface.co/Lightricks/LTX-2.5</a>- <a target="_blank" rel="ugc" href="https://huggingface.co/Lightricks/LTX-2.5-22b-IC-LoRA-Pixel-Spatial-Upscaler">https://huggingface.co/Lightricks/LTX-2.5-22b-IC-LoRA-Pixel-Spatial-Upscaler</a>Custom-node dependencies:- <a target="_blank" rel="ugc" href="https://github.com/Lightricks/ComfyUI-LTXVideo">https://github.com/Lightricks/ComfyUI-LTXVideo</a>- <a target="_blank" rel="ugc" href="https://github.com/kijai/ComfyUI-KJNodes">https://github.com/kijai/ComfyUI-KJNodes</a>Copy the supplied <code>ltx25_int8_upscale_core</code> folder into <code>ComfyUI/custom_nodes</code>, restart, then open the JSON.## Notes- A source frame count of <code>8n+1</code> is recommended.- Use a source with an audio track if you want audio preserved.- No LTX text encoder is required at runtime; the package includes a fresh empty-prompt conditioning cache generated from the official LTX 2.5 INT8 encoder.- The release was checked for graph loading and node availability on RTX 5080 16 GB. The newly assembled graph was not rendered during packaging.## LicenseLTX 2.5 and the Pixel Spatial Upscaler are by Lightricks. This download includes the complete LTX-2.x Community License and a notice describing the modifications. Review the license before use or redistribution.

LTX 2.5 INT8 Upscaler - Simple | 16gb Vram : x2 - 2Min

Initial public release.- Clean video-only ComfyUI workflow- INT8 ConvRot transformer- Official LTX 2.5 Pixel Spatial Upscaler x2 IC-LoRA- 1.5x, 2.0x, 2.5x, and 3.0x scale dropdown- Preserves source audio- No prompt or text encoder required at runtime- 8 distilled sampling steps, CFG 1- SageAttention and tiled VAE decoding- Model weights are not includedThe 2.0x option is the adapter's trained target. Other scale values are experimental.

Files with SHA256: 2d22538a8aff34cc4639104f674507f597ce6d6067e4a438e7ecb08ebf69d973