comfyui-ltx-node

comfyui-ltx-node 🎬

ComfyUI custom nodes for LTX-2.3 Pro video generation API (ltx.video).

Nodes

| Node | Input | Output | |------|-------|--------| | 🎤 LTX Audio to Video | IMAGE + audio path + prompt | lip-sync video | | 📝 LTX Text to Video | prompt | video | | 🖼️ LTX Image to Video | IMAGE + prompt | animated video | | ➕ LTX Extend Video | video URL + prompt | extended video | | 🔁 LTX Retake Section | video URL + frame range | retaken video | | ☁️ LTX Image Uploader | IMAGE | HTTPS URL |

Installation

cd ComfyUI/custom_nodes
git clone https://github.com/PauldeLavallaz/comfyui-ltx-node
pip install requests pillow

Usage

1. Get your API key from ltx.video/api-keys
2. Add any LTX node to your workflow
3. Paste your API key in the api_key field
4. Connect inputs and run

Audio to Video (Lip-sync)

The main node. Accepts:

• image — ComfyUI IMAGE (auto-resized to max 1920px, uploaded automatically)
• audio_path — local path to .mp3, .ogg, or .wav (auto-converted to MP3)
• prompt — describe the motion/scene
• api_key — your LTX API key
• model — ltx-2-3-pro (best) or ltx-2-3-fast (quick tests)
• resolution — 1080x1920 (portrait) or 1920x1080 (landscape)
• duration — seconds (0 = auto-match audio length)
• negative_prompt — what to avoid

⚠️ Audio-to-video only supports 1080x1920 or 1920x1080.
Images larger than 1920px are auto-resized. OGG/WAV files are auto-converted to MP3.

Notes

• All uploads go through uguu.se (temporary HTTPS hosting required by LTX API)
• Videos are saved to ComfyUI's output/ directory
• ffmpeg required for OGG/WAV → MP3 conversion

Models

| Model | Speed | Quality | |-------|-------|---------| | ltx-2-3-pro | ~30-60s | Best | | ltx-2-3-fast | ~17s | Good for testing |