video / Video / Intermediate
LTX 2.3 — Portrait Video
Use a portrait 720 × 1280 setting in the LTX 2.3 video graph.
What it produces
Use a portrait 720 × 1280 setting in the LTX 2.3 video graph.
HARDWARE & SETTINGS
UNKNOWN VRAM requirement
This is a catalog estimate, not a tested minimum. GPU architecture, precision, resolution and offloading affect whether a run fits.
- Output settings
- See graph settings below
- Workflow version
- v2.3
- System RAM
- Not documented
- Test hardware
- No recorded run
- Generation time
- Not measured
- Peak memory
- Not measured
HARDWARE INTELLIGENCE LAYER
Will this run on my GPU?
Evaluate evidence-backed execution feasibility for your specific hardware.
Frontend Subgraph Expansion Required
The saved preflight reports frontend composite subgraphs requiring canvas expansion. This is a tooling blocker, not an observed GPU execution failure.
CLOSEST EVIDENCE
No execution record recorded locally for this workflow yet.
MEASURED RUNTIME SPECS
Run metrics not available. Displaying catalog estimates only.
Lower-Memory Alternatives (Fit within 16GB VRAM):
Execution history (0)
Success applies to the recorded settings. Failure is an outcome; STANDARD and OPTIMIZED describe execution settings. Historical runs without that distinction remain unclassified.
No recorded executions.
No comparable cross-GPU executions. Timing comparisons require matching workflow, inputs, model hashes, settings, software, precision and timing protocol.
Models & custom nodes
These model filenames are extracted from the downloadable graph, including subgraphs. Check each source’s license and access requirements.
ComfyUI/models/checkpoints/ComfyUI/models/loras/ComfyUI/models/latent_upscale_models/ComfyUI/models/text_encoders/ComfyUI/models/loras/Custom nodes
The graph uses ComfyUI core nodes. Use a recent ComfyUI version that includes these node types.
This graph contains subgraphs and needs a frontend with subgraph support.
Custom node setup guide →Installation & first run
- Install ComfyUI using the official requirements and installation documentation for your operating system and GPU.
- Download this workflow JSON. Use the listed model sources above and place the required files in the indicated model folders. Model folder guide →
- Load the JSON in ComfyUI. Resolve missing nodes and select installed model files in the loader nodes. Supply any required input image, video or audio.
- Review the graph’s settings before running. See the settings extracted below; a recorded test only establishes the specific configuration used in that run.
- Run the workflow and check the ComfyUI console if it fails. Keep the exact error text, software versions and your hardware details for troubleshooting.
Example prompt from the catalog
Cyberpunk street at night, neon lights reflecting in puddles, rain, vertical 9:16 composition
This prompt is a starting point, not evidence that the preview was produced by this workflow.
Explore the workflow
When a run fails
Missing model or a model name is not available
Compare the graph’s loader file names with your installed files and the dependency list. Check model folders →
Missing or unrecognized node type
Record the exact node type and check its source and version before installing extensions. Custom node guide →
GPU memory or execution error
The VRAM estimate is not a guarantee. Record the error, input dimensions, model precision and batch size. GPU error guide → · Workflow error guide →
Graph settings & required inputs
No Load Image input file is required by this graph.
View the graph’s saved controls
[768,512,97,1]
[1280,"fixed"]
[25,"fixed"]
[5,"fixed"]
[720,"fixed"]
Testing & source information
No completed run is recorded for this entry. Graph checks do not establish successful generation. GPU test hardware, measured runtime, peak memory and supported software versions remain unverified.
Catalog version: v2.3. Original publication date is not recorded.
Graph source: video_ltx2_3_t2v.json ↗. Upstream license
What a complete test record includes →Related workflows
LTX Video 2.3 — Basic T2V
Generate a video with audio using the upstream LTX 2.3 text-to-video graph.
UNKNOWN VRAM requirement
ltx-2.3-22b-dev-fp8.safetensors
Setup & download
LTX Video — Action Chase
Explore an LTX 2.3 video prompt following a cyclist on a forest trail.
UNKNOWN VRAM requirement
ltx-2.3-22b-dev-fp8.safetensors
Setup & download
LTX 2.3 — Short Video Draft
Explore a two-second, 768 × 512 LTX 2.3 video setting. Runtime is not benchmarked.
UNKNOWN VRAM requirement
ltx-2.3-22b-dev-fp8.safetensors
Setup & download