Trying to get omnimattezero installed but cant find the models

Hmm… I found something a little hard to find, but there is a likely substitute. I think it should work if you rename it:

---

The exact filename from the ComfyUI_OmnimatteZero README:

LTX-Video-0.9.7-diffusers-Q8_0.gguf

does not seem to exist publicly on Hugging Face under that exact name, at least not in the obvious linked repo. However, I think the likely intended GGUF is this one:

ltxv-13b-0.9.7-dev-Q8_0.gguf

from:

wsbagnsv1/ltxv-13b-0.9.7-dev-GGUF

The reason I think this is the right substitute is that the OmnimatteZero README appears to use a simplified / renamed filename, while the actual available GGUF repos use the LTXV 13B naming convention.

Short answer

Try this file:

ltxv-13b-0.9.7-dev-Q8_0.gguf

Put it here:

ComfyUI/models/gguf/ltxv-13b-0.9.7-dev-Q8_0.gguf

Then, if the OmnimatteZero node expects the README-style name or you want to avoid confusion, rename it to:

ComfyUI/models/gguf/LTX-Video-0.9.7-diffusers-Q8_0.gguf

In the node, select the GGUF file from the gguf dropdown and set the dit / diffusion model field to none.

Why this looks like the right file

The OmnimatteZero README lists the model locations like this:

Component	README location	README filename
VAE	ComfyUI/models/vae	LTX-Video-0.9.7-vae-diffusers.safetensors
DiT / safetensors	ComfyUI/models/diffusion_models	LTX-Video-0.9.7-diffusers.safetensors
GGUF	ComfyUI/models/gguf	LTX-Video-0.9.7-diffusers-Q8_0.gguf

Source:

smthemex/ComfyUI_OmnimatteZero README

The README links the DiT/GGUF model line to a Chinese cloud source and to this Hugging Face repo:

smthem/LTX-Video-0.9.7-diffusers-merge

But that smthem repo only appears to contain the safetensors file:

LTX-Video-0.9.7-diffusers.safetensors

I do not see the GGUF file there.

The likely matching GGUF is instead in:

wsbagnsv1/ltxv-13b-0.9.7-dev-GGUF

That model card says it is a direct GGUF conversion of the 13b-0.9.7-dev variant from Lightricks/LTX-Video and that it can be used in ComfyUI with the ComfyUI-GGUF custom node.

Relevant file:

ltxv-13b-0.9.7-dev-Q8_0.gguf

File page:

ltxv-13b-0.9.7-dev-Q8_0.gguf

Suggested download command

From your ComfyUI directory:

huggingface-cli download \
  wsbagnsv1/ltxv-13b-0.9.7-dev-GGUF \
  ltxv-13b-0.9.7-dev-Q8_0.gguf \
  --local-dir ./models/gguf

Or with an explicit ComfyUI path:

huggingface-cli download \
  wsbagnsv1/ltxv-13b-0.9.7-dev-GGUF \
  ltxv-13b-0.9.7-dev-Q8_0.gguf \
  --local-dir <path-to-your-ComfyUI>/models/gguf

Optional rename:

mv \
  <path-to-your-ComfyUI>/models/gguf/ltxv-13b-0.9.7-dev-Q8_0.gguf \
  <path-to-your-ComfyUI>/models/gguf/LTX-Video-0.9.7-diffusers-Q8_0.gguf

On Windows PowerShell:

Rename-Item `
  "<path-to-your-ComfyUI>\models\gguf\ltxv-13b-0.9.7-dev-Q8_0.gguf" `
  "LTX-Video-0.9.7-diffusers-Q8_0.gguf"

Why renaming should be okay

From the OmnimatteZero code, the filename does not appear to be hardcoded. The node registers a gguf folder and then exposes files from that folder in the gguf dropdown.

Relevant code:

OmnimatteZero_node.py

The important part is that it adds:

ComfyUI/models/gguf

as a model folder, and then the node has separate dropdowns for:

dit
gguf
vae

So the practical setup should be:

dit  = none
gguf = ltxv-13b-0.9.7-dev-Q8_0.gguf
vae  = LTX-Video-0.9.7-vae-diffusers.safetensors

or, if renamed:

dit  = none
gguf = LTX-Video-0.9.7-diffusers-Q8_0.gguf
vae  = LTX-Video-0.9.7-vae-diffusers.safetensors

The loader code also has a separate GGUF path. If gguf_path is not None, it loads the transformer from the GGUF file with LTXVideoTransformer3DModel.from_single_file(...) and GGUFQuantizationConfig(...).

Relevant code:

object_removal.py

If Q8_0 is too heavy

Q8_0 is large. The wsbagnsv1 repo also has smaller quantized files:

Quant	File	Approx. size
Q8_0	ltxv-13b-0.9.7-dev-Q8_0.gguf	14 GB
Q6_K	ltxv-13b-0.9.7-dev-Q6_K.gguf	10.9 GB
Q5_K_M	ltxv-13b-0.9.7-dev-Q5_K_M.gguf	9.82 GB
Q4_K_M	ltxv-13b-0.9.7-dev-Q4_K_M.gguf	8.82 GB
Q3_K_S	ltxv-13b-0.9.7-dev-Q3_K_S.gguf	5.86 GB

Repo file list:

wsbagnsv1/ltxv-13b-0.9.7-dev-GGUF files

For a first test, Q4_K_M may be easier:

huggingface-cli download \
  wsbagnsv1/ltxv-13b-0.9.7-dev-GGUF \
  ltxv-13b-0.9.7-dev-Q4_K_M.gguf \
  --local-dir ./models/gguf

Alternative GGUF repo

There is also another GGUF repo here:

calcuis/ltxv0.9.7-gguf

It contains a similarly named Q8 file:

ltxv-13b-0.9.7-dev-q8_0.gguf

File list:

calcuis/ltxv0.9.7-gguf files

I would try the wsbagnsv1 repo first, because its model card explicitly says it is a direct GGUF conversion of the LTXV 13b-0.9.7-dev variant and mentions ComfyUI / ComfyUI-GGUF usage.

VAE note

For the VAE, the OmnimatteZero README points to:

a-r-r-o-w/LTX-Video-0.9.7-diffusers

The README says to place it as:

ComfyUI/models/vae/LTX-Video-0.9.7-vae-diffusers.safetensors

So if your downloaded VAE has a generic name like:

diffusion_pytorch_model.safetensors

rename it to:

LTX-Video-0.9.7-vae-diffusers.safetensors

My guess

I think the README filename:

LTX-Video-0.9.7-diffusers-Q8_0.gguf

is probably one of these:

1. a local / renamed copy of ltxv-13b-0.9.7-dev-Q8_0.gguf;
2. a filename from the Chinese cloud mirror mentioned in the README;
3. a simplified name written by the OmnimatteZero wrapper author to match the safetensors naming style.

But the actual public HF file that seems to correspond to it is most likely:

ltxv-13b-0.9.7-dev-Q8_0.gguf

from:

wsbagnsv1/ltxv-13b-0.9.7-dev-GGUF

Practical checklist

ComfyUI/models/gguf/
  ltxv-13b-0.9.7-dev-Q8_0.gguf
  # or renamed:
  LTX-Video-0.9.7-diffusers-Q8_0.gguf

ComfyUI/models/vae/
  LTX-Video-0.9.7-vae-diffusers.safetensors

ComfyUI/models/diffusion_models/
  # leave empty / do not use if using GGUF

Then in OmnimatteZero_SM_Model:

dit  = none
gguf = ltxv-13b-0.9.7-dev-Q8_0.gguf
vae  = LTX-Video-0.9.7-vae-diffusers.safetensors

If it runs out of memory, try Q6_K, Q5_K_M, or Q4_K_M instead of Q8_0.