⬡ LTX Video Settings¶
Defines LTX-2.3 video+audio generation parameters with ManualSigmas presets.
Inputs¶
| Name | Type | Required | Default | Description |
|---|---|---|---|---|
width |
INT |
✅ | 768 | Video width (multiples of 32). 768 is native LTX-2.3 default |
height |
INT |
✅ | 512 | Video height (multiples of 32). 512 is native LTX-2.3 default |
duration |
FLOAT |
✅ | 5.0 | Video duration in seconds (0.5–30.0) |
frame_rate |
INT |
✅ | 25 | Frames per second. 25 is native LTX-2.3 rate |
seed |
INT |
✅ | 0 | Seed for random number generation |
audio_enabled |
BOOLEAN |
❌ | True | Generate audio alongside video |
sigmas_preset |
COMBO |
❌ | Standard (8 steps) | Sigma schedule preset |
custom_sigmas |
STRING |
❌ | (empty) | Comma-separated sigma values (Custom preset only) |
Outputs¶
| Name | Type | Description |
|---|---|---|
video_settings |
UME_VIDEO_SETTINGS |
Complete settings bundle for the LTX Video Generator |
Sigmas Presets¶
| Preset | Pass 1 Steps | Pass 2 Steps | Notes |
|---|---|---|---|
| Standard (8 steps) | 8 | 3 | Best quality — recommended for most use cases |
| Fast (4 steps) | 3 | 3 | Requires distilled LoRA for acceptable quality |
| Custom | User-defined | Standard Pass 2 | Enter comma-separated sigma values |
Custom Sigmas
For the Custom preset, enter comma-separated descending sigma values starting from 1.0 and ending at 0.0.
Example: 1.0, 0.85, 0.725, 0.422, 0.0
Resolution
LTX-2.3 uses 32-pixel alignment (step=32) unlike WAN which uses 16-pixel alignment.
Audio
Audio generation requires the Audio VAE to be loaded in the LTX Loader. Disable audio_enabled for video-only output.