This tutorial shows how to install ComfyUI on a Windows PC with an NVIDIA RTX card and use it to generate AI videos from text prompts or animate existing images, all locally for free. The video focuses on the LTX 2.3 model and walks through the entire workflow from download to preview.
A short editorial from the VEONIB team on why this content matters.
ComfyUI delivers professional-grade AI video generation entirely free on your own hardware—no clouds, no paywalls.
Unlike most tutorials, this one includes an end-to-end walkthrough of both text and image workflows, emphasizing the LTX 2.3 model's speed and wide GPU compatibility.
Any content creator or AI enthusiast with an NVIDIA RTX PC should install ComfyUI and start experimenting with its free video generation capabilities.
Free, open-source AI interface that runs models locally on your PC.
A fast AI video model that runs locally on RTX graphics cards.
Generate video from a written description using AI.
Animate a static image by adding motion based on a prompt.
NVIDIA GPU required for optimal local AI video generation.
A visual node-based pipeline in ComfyUI for AI tasks.
Running AI models on your own hardware without cloud services.
Do I need a powerful PC to run ComfyUI?
Yes, an NVIDIA RTX graphics card is recommended for best performance and compatibility.
Is ComfyUI completely free?
Yes, the desktop version is free with no API keys or subscriptions; the cloud option requires a paid plan.
How much disk space is needed for the models?
The LTX 2.3 workflow requires about 40 GB of storage for the model files.
Can I use ComfyUI on a Mac or Linux?
This tutorial focuses on Windows; Mac and Linux may have limited compatibility, especially without NVIDIA GPUs.
What is LTX 2.3?
It's a fast, locally-runnable AI video model that generates high-quality results on many RTX cards.
How do I fix missing model errors?
Click 'Show missing models' and then 'Download all' to automatically fetch the required files.
Can I animate my own photos with ComfyUI?
Yes, use the image-to-video workflow: drag in an image and enter a motion prompt.
Where are generated videos saved?
They are automatically saved in ComfyUI's Assets panel; you can right-click to export.
Can I use other video models besides LTX 2.3?
Yes, ComfyUI supports many models like WaN, Hunyuan, Kandinsky, and SVD.
Do I need internet to generate videos?
Only during initial model downloads; after that, generation runs entirely offline.