LTX-2.3 NEW ULTRA WORKFLOW!
Added 2026-03-21 17:54:16 +0000 UTC
Comments
Any tips on getting nsfw working? Do I just add lora's on top? I've already switched to a heretic trained gemma-3
kenzo47
2026-03-22 22:17:54 +0000 UTCdepending on your vram, fp8 might be faster than gguf, gguf is usually a better model than fp8
Aitrepreneur
2026-03-22 21:38:23 +0000 UTCNoob question - I am trying to extend a video which does not have audio - but the workflow expects audio and errors when it can't find it. Any ideas how to work around that?
Bryan Gilberd
2026-03-22 21:17:33 +0000 UTCBest workflow out there, higher vid quality or base workflow not sure why but does take 2x longer for 5 sec clip thanthe fp8 defaulf workflow. Why better image quality is my question cant figure it out
x:)
2026-03-22 21:00:48 +0000 UTCThe way I do it is that it I just put a resize video node at the end, so it should always resizes correctly the final video to the values you input before the generation
Aitrepreneur
2026-03-22 20:37:03 +0000 UTCThis unfortunately happens more often than you think, to me as well... that's not an issue with my installers unfortunately, it's sometimes a weird combo of existing nodes, env, etc... Hence why I often recommend a fresh install
Aitrepreneur
2026-03-22 20:35:54 +0000 UTCIt needs to be simple, for example here's the prompt for the soprano video: Style: realistic, Tony Soprano in a dim warmly lit room with a bookshelf behind him, close-up, he looks slightly off-camera then back, speaking in an annoyed deadpan with perfect lip sync: “Meanwhile these days? Everybody’s yappin’ nonstop. Even my toaster’s got opinions.” He pauses, squints, then adds: “What happened to mindin’ your business?” Subtle head shake, natural blinking, camera locked, background unchanged.
Aitrepreneur
2026-03-22 19:53:16 +0000 UTCI mean you can change the resolution of the output so that it makes your original image res
Aitrepreneur
2026-03-22 19:52:08 +0000 UTCIt happens for me too sometimes, I added a clear vram/clear cache nodes but it still happens sometimes, comfyui is known for frequent memory leaks...very annoying unfortunately.
Aitrepreneur
2026-03-22 19:50:52 +0000 UTCAnyone have issues with the last 3 steps? Sometimes after the first render, my GPU would stall at 100% for 10 times longer than usual. I usually end up closing Comfyui and restarting to solve the issue.
troy X
2026-03-22 19:37:42 +0000 UTCThis is working well for image-to-video, but as the output is 1920x1080, your input needs similar dimanesions, or gets cropped. Is there an easy way to adapt it to make the output match the input aspect ratio? (Ideally scaled to a max res of 1920 w or 1080 h). This would really help with square or portrait images.
Thoth Amon
2026-03-22 19:22:31 +0000 UTCI keep getting this as well. I close the workflow and drag it into comfyui again and it works. It gives the same error if I load up from scratch again, until I close and drag the workflow back in.
BuAuch
2026-03-22 18:53:55 +0000 UTCwhich part? I might experiencing the same issue
newtoai
2026-03-22 18:35:34 +0000 UTCGreat workflow! For the video extend, should prompt describe the scene and speaking of the source video, or just what happens in the extend part?
Rob113
2026-03-22 17:13:53 +0000 UTCFYI: in the video extension section, your subgraph is sending the rate back to the video input's force_rate which causes a loop. comfyui won't submit the workflow with that loop, so it's best to disconnect that link.
Neal Barnett
2026-03-22 09:51:04 +0000 UTCI get this error when I open ComfyUI Missing Node Packs (1) This workflow uses custom nodes you haven't installed yet. To install missing nodes, first run pip install -U --pre comfyui-manager in your Python environment to install Node Manager, then restart ComfyUI with the --enable-manager flag. RES4LYF (1) Frames Slice
Ash
2026-03-22 08:50:04 +0000 UTCWelp, great, this broke my comfyUI again.
Tyler
2026-03-22 05:26:10 +0000 UTCThe model card says "Width & height settings must be divisible by 32. Frame count must be divisible by 8 + 1". Yet the workflow and demo video are using values for height and frame rate that don't follow these rules. Is this workflow really smart enough to do the extra padding/cropping to correct for the bad input format?
Gi Doe
2026-03-22 01:50:53 +0000 UTCSo happy to see the new FMLF addition to your workflow. That's awesome. Is there any reason you dropped the V2V workflow? That would be useful beyond the extended video workflow (which is awesome as well!). I tried to update the existing V2V in your LTX-2 workflow set, but it failed. Not sure if it is still an option. Thanks for all of your efforts! Glad you are recovering!
PTMarks
2026-03-22 01:42:53 +0000 UTC
