LTX2.3 | How to Extend AI Video & Audio Flawlessly,3 Steps to Extend & Upscale LTX 2.3 Videos to 2K!
Are your AI videos always ending too soon? What if you could extend them endlessly while keeping the audio perfectly synced? ⏱️🚀
In this advanced LTX 2.3 ComfyUI tutorial, we tackle the biggest pain points in AI video generation: short durations and low resolutions. I'll show you exactly how to outpaint (extend) your videos in the Latent Space using the hidden LTXV Audio video mask node, ensuring character consistency and flawless sound continuity.
🔥 What you'll master in this tutorial:
• ⏳ Infinite Video Extension: How to seamlessly extend a short video (and its audio!) into a longer cinematic sequence without breaking consistency.
• 🧠 Latent Space Secrets: Why compressing frames in the latent space (8x reduction!) makes generation faster and more efficient.
• 🎨 The Seamless Blend Trick: Say goodbye to color shifting and flickering! Learn how to use Linear Blend overlap to stitch generated clips flawlessly.
• ⚡ Blazing-Fast 2K Upscaling: How to use the RTX Video Super Resolution node for an ultra-fast, 3-stage 2K upscale.
#runninghub #LTX23 #AIVideo #ComfyUI #VideoExtension #AIAudio #GenerativeAI #ComfyUITutorial #RTXSuperResolution #AIUpscaling #RunningHub #MachineLearning #VideoOutpainting #AIAnimation #OpenSourceAI #TechTutorial
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resource
kijai's ltx2.3 model
https://huggingface.co/Kijai/LTX2.3_comfy
KJ nodes
https://github.com/kijai/ComfyUI-KJNodes
Nvidia_RTX_Nodes_ComfyUI
https://github.com/Comfy-Org/Nvidia_RTX_Nodes_ComfyUI
online workflow
1：video_ltx2_3_extend_video_hres
https://www.runninghub.ai/post/2034857619277488130/?inviteCode=kol02-rh021
Runninghub Fan Benefit: Register to get 1,000 RHB
https://www.runninghub.ai/?utm_source=kol02-RH021
workflow and prompt engineering download：
https://github.com/amao2001/ganloss-latent-space/blob/main/workflow/2026-03-23%20video_ltx2_3_extend_video_hres.json
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