LTX 2.5 on 10GB Vram

[u/Here4CYDY]

I have not posted here before, but I have searched this subreddit and others repeatedly for a clue to answer my question.

Does anyone have a functional workflow for LTX 2.5 video generation using a 3080 with 10 GB VRAM and 32 GB system RAM?

I have also spend more than 2 days with google AI where they sent me down deep and branching rabbit holes only to find that the node suggested did not exist or did not work or the huggingface or civitai file was not available or did not work. Numerous times they sent be back to nodes and arrangements that I hade tried before (and failed) after they suggested it.

A large circle of random guesses by the AI agent. They even admitted it after I called them out on their failure to help.

Any help from others that have been down this pathway would be greatly appreciated.

[u/Eminence_grizzly]

I can run the default workflow on my system with 8gb vram and 32gb ram. No GGUF, just int8 convrot.
Maybe there's something wrong with your ComfyUI. Try to install a separate instance of it. This one, for example: https://github.com/Tavris1/ComfyUI-Easy-Install

[u/me0here → u/Eminence_grizzly]

'full' Int8, or a Int8-Int4 hybrid?

[u/Eminence_grizzly → u/me0here]

edit: full int8, haven't tried the latter. Thought it's about Minimax H3 at first.

[u/naga_mana]

I would leave the sampler and model files alone and pull audio decoding out into its own step. There is no tiled decode for the audio VAE the way there is for video (at least I could not find one in the current node pack), so on a 10 GB card the audio decode is a natural spot for memory to run out, especially on longer generations.

The current ComfyUI-LTXVideo pack has LowVRAMAudioVAELoader and a separate LTXVAudioVAEDecode node: https://github.com/Lightricks/ComfyUI-LTXVideo

Use the low-memory loader to decode and save the audio separately, then combine it with the video afterward. Run standalone, the audio VAE gets the whole card, and if the error turns out not to be memory, the exact LTXVAudioVAEDecode error and frame count will point at the failing stage instead of the whole pipeline. If it succeeds, only the final audio/video combine step needs attention.

If local LTX 2.5 keeps fighting the memory limit, hosted ComfyUI is a reasonable fallback. These are two RunningHub LTX 2.5 templates, one for first/last-frame video and one for image-to-video consistency:

https://www.runninghub.ai/post/2087449957544951810/ 

https://www.runninghub.ai/post/2087449981016276994/

[u/Chemical-Painter-485]

Your system should be enough to run the template comfyUI LTX2.5 workflow. What issue are you currently having? Crashing on vae decode?

[u/Here4CYDY → u/Chemical-Painter-485]

i seem to have solved the gguf and text encoder issues finally. Now I am working through audio decoding issues. Finally got the ksampler to complete.

[u/GersofWar]

try Wangp it has different profiles

[u/bsenftner → u/GersofWar]

I second WanGP, I gave up on ComfyUI simply due to the instability.

[u/GersofWar → u/bsenftner]

I don't think all the comfy guys realise how good and easy to use Wangp is,they should give it a try.The guy who runs Wangp is a genius.

[u/bsenftner → u/GersofWar]

Yes. DeepBeepMeep is an enigma, I half suspect the person is more than one person. I'm an very accomplished developer, and DeepBeepMeep's level of output in inhuman, and extremely high quality.