LTX-2 Manual Install Guide

Manual Install Method from my last Youtube video:  https://youtu.be/KKdEgpA3rjw



Windows Installation (Local PC)
Step 1: Prerequisites

Make sure you have these installed before doing anything else:

7-Zip
https://www.7-zip.org/

Git for Windows
https://git-scm.com/download/win

Reboot once after installing Git to ensure it is available in cmd.

Step 2: Download and Extract ComfyUI

Download the official NVIDIA portable build of ComfyUI:

ComfyUI v0.9.2 (NVIDIA Portable)
https://github.com/comfyanonymous/ComfyUI/releases/download/v0.9.2/ComfyUI_windows_portable_nvidia.7z

Extract it with 7-Zip.

Your folder structure must look like this:

ComfyUI_windows_portable/
├── ComfyUI/
│   ├── models/
│   └── custom_nodes/
├── python_embeded/
└── run_nvidia_gpu.bat


If this structure is wrong, stop here and fix it.

Step 3: Install Required Custom Nodes

Open Command Prompt inside:

ComfyUI_windows_portable\ComfyUI\custom_nodes


Then clone all required nodes:

git clone https://github.com/ltdrdata/ComfyUI-Manager.git
git clone https://github.com/city96/ComfyUI-GGUF
git clone https://github.com/rgthree/rgthree-comfy
git clone https://github.com/yolain/ComfyUI-Easy-Use
git clone https://github.com/kijai/ComfyUI-KJNodes
git clone https://github.com/ssitu/ComfyUI_UltimateSDUpscale
git clone https://github.com/cubiq/ComfyUI_essentials
git clone https://github.com/wallish77/wlsh_nodes
git clone https://github.com/vrgamegirl19/comfyui-vrgamedevgirl
git clone https://github.com/ClownsharkBatwing/RES4LYF
git clone https://github.com/theUpsider/ComfyUI-Logic
git clone https://github.com/Fannovel16/comfyui_controlnet_aux
git clone https://github.com/Lightricks/ComfyUI-LTXVideo
git clone https://github.com/pythongosssss/ComfyUI-Custom-Scripts
git clone https://github.com/crystian/ComfyUI-Crystools
git clone https://github.com/Kosinkadink/ComfyUI-VideoHelperSuite
git clone https://github.com/Derfuu/Derfuu_ComfyUI_ModdedNodes
git clone https://github.com/kijai/ComfyUI-MelBandRoFormer
git clone https://github.com/M1kep/ComfyLiterals
git clone https://github.com/YaserJaradeh/comfyui-yaser-nodes
git clone https://github.com/olduvai-jp/ComfyUI-S3-IO

Step 4: Install Node Dependencies

Still inside custom_nodes, install requirements using ComfyUI’s embedded Python:

..\..\python_embeded\python.exe -m pip install -U pip


Then, for every node that has a requirements.txt, run:

..\..\python_embeded\python.exe -m pip install -r ComfyUI-Manager\requirements.txt
..\..\python_embeded\python.exe -m pip install -r ComfyUI-GGUF\requirements.txt
..\..\python_embeded\python.exe -m pip install -r rgthree-comfy\requirements.txt
..\..\python_embeded\python.exe -m pip install -r ComfyUI-Easy-Use\requirements.txt
..\..\python_embeded\python.exe -m pip install -r ComfyUI-KJNodes\requirements.txt
..\..\python_embeded\python.exe -m pip install -r ComfyUI_UltimateSDUpscale\requirements.txt
..\..\python_embeded\python.exe -m pip install -r ComfyUI_essentials\requirements.txt
..\..\python_embeded\python.exe -m pip install -r wlsh_nodes\requirements.txt
..\..\python_embeded\python.exe -m pip install -r comfyui-vrgamedevgirl\requirements.txt
..\..\python_embeded\python.exe -m pip install -r RES4LYF\requirements.txt
..\..\python_embeded\python.exe -m pip install -r ComfyUI-Logic\requirements.txt
..\..\python_embeded\python.exe -m pip install -r comfyui_controlnet_aux\requirements.txt
..\..\python_embeded\python.exe -m pip install -r ComfyUI-LTXVideo\requirements.txt
..\..\python_embeded\python.exe -m pip install -r ComfyUI-Custom-Scripts\requirements.txt
..\..\python_embeded\python.exe -m pip install -r ComfyUI-Crystools\requirements.txt
..\..\python_embeded\python.exe -m pip install -r ComfyUI-VideoHelperSuite\requirements.txt
..\..\python_embeded\python.exe -m pip install -r Derfuu_ComfyUI_ModdedNodes\requirements.txt
..\..\python_embeded\python.exe -m pip install -r ComfyUI-MelBandRoFormer\requirements.txt
..\..\python_embeded\python.exe -m pip install -r ComfyLiterals\requirements.txt
..\..\python_embeded\python.exe -m pip install -r comfyui-yaser-nodes\requirements.txt
..\..\python_embeded\python.exe -m pip install -r ComfyUI-S3-IO\requirements.txt


Yes, this takes time. That’s why the installer exists 😄

Step 5: Download LTX-2 Models

All model files are hosted here:
👉 Hugging Face
https://huggingface.co/Aitrepreneur/FLX/tree/main

Place them exactly like this:

models/text_encoders/
ltx-2-19b-embeddings_connector_dev_bf16.safetensors
gemma-3-12b-it-IQ4_XS.gguf

models/vae/
LTX2_audio_vae_bf16.safetensors
LTX2_video_vae_bf16.safetensors

models/unet/

Choose one based on your GPU:

<12 GB VRAM → ltx-2-19b-dev-Q4_K_S.gguf

12–16 GB → ltx-2-19b-dev-Q5_K_S.gguf

24 GB+ → ltx-2-19b-dev-Q8_0.gguf

models/latent_upscale_models/
ltx-2-spatial-upscaler-x2-1.0.safetensors

models/diffusion_models/
MelBandRoformer_fp32.safetensors

models/loras/
ltx-2-19b-distilled-lora-384.safetensors
ltx-2-19b-ic-lora-detailer.safetensors
ltx-2-19b-ic-lora-depth-control.safetensors
ltx-2-19b-ic-lora-pose-control.safetensors

Step 6: Run ComfyUI

From ComfyUI_windows_portable:

Double-click run_nvidia_gpu.bat

Open browser at http://127.0.0.1:8188

If it launches, you’re done.

RunPod Installation (Cloud)
Step 1: Create Account

👉 RunPod
https://bit.ly/runpodAi

Step 2: Create Pod

Choose 24 GB VRAM GPU

Use aitrepreneur/comfyui template

Expose port 8188

Step 3: Inside the Pod

SSH or Web Terminal into the pod.

Make sure you are inside the ComfyUI root where models/ and custom_nodes/ exist.

Step 4: Create Virtual Environment
python3 -m venv venv
source venv/bin/activate
pip install -U pip setuptools wheel hf_transfer

Step 5: Install Torch (CUDA)
pip install torch==2.4.0+cu121 torchvision==0.19.0+cu121 torchaudio==2.4.0+cu121 \
  --index-url https://download.pytorch.org/whl/cu121

Step 6: Install Core Dependencies
pip install diffusers transformers accelerate safetensors \
einops sentencepiece numpy pillow opencv-python-headless \
gguf piexif boto3 deepdiff rotary-embedding-torch py-cpuinfo

Step 7: Clone Nodes

Clone the same nodes as the Windows section into custom_nodes/.

Step 8: Download Models

Use curl:

curl -L -o filename "HUGGINGFACE_URL"


Follow the exact same folder structure as the Windows guide.

Step 9: Run ComfyUI
python main.py


Watch logs:

tail -f workspace/logs/comfyui.log




IF YOU GET OOM error:
EXTRA_ARGS     --reserve-vram 10 --cache-none