[edit:
07.04.2026: Update version 4.2 (see version description).
07.04.2026 New workflow version v4.0
Thanks to all users for the many inputs over the last days and weeks 🙂
I clearly understood, that the limitiation to the 16:9/9:16 aspect ratios in version v3.0 was annoying. I heard at your voices and tried to find a solution to "re-open" the aspect ratio limitiation, while keeping the inputs simple as possible, as well as respecting the LTX-2.3 specifications.
Fortunately I found a smart node for easy inputs wich includs the complete background calculations too - and by adding some simple "tricks" this should work now easy a hell for all options😉
Attention:
If you struggle with node conflicts or you get errors while running the workflow, please have a look at my short Trouble Shooting Guide note in the wokflow first. Most importent is to update all components sucsessfully! ]
Special thanks to:
@ArcleinSK for investigation and solving the FLF issue, as well as forcing the First-Mid-Last Frame option and last but not least for charing fantastic knowlage.
@boinobin730 for initialising, forcing and supporting this project in all kinds of matter, like providing links, running tests, sharing knowlage and inspiring diskussions.
@Urabewe for publishing the original, perfectly running 12 GB VRAM LTX-2.3 workflows mainly used here in this workflow.
Features:
Simple to use all-In-One LTX-2 workflow with options for:
Text to Video
Image to Video
First/Last Frame to Video
Fisrt/Mid/Last Frame to Video
Video to Video
Text + Audio to Video
Image + Audio to Video
First/Last Frame + Audio to Video
First/Mid/Last Frame + Audio to Video
easy switching between all options,
all steps highly automated: no manual frame or width/hight calculations necessary,
easy to set inputs by predefined sliders and aspeckt ratio inputs (no risk to set wrong frame counts or wrong width/hight values),
completely automated resizing and cropping (if necessary) of your input images/videos.
brilliant audio generation (speech/sound) with LTX-2.3.
LTX-2.3 specifications:
Workflow version v4.0 consistently follows the LTX-2.3 specifications for 16:9/9:16 aspect ratios, including automatic width/hight calculations, as well as automatic input image/video resizing/cropping.
In addition you can simply choose now any other aspect ratios according to your needs while still getting the right values calculated for width/hight and automatic image/video resize/crop.
Requirements:
GPU with 12 GB VRAM (some users reported they got it running with 8 GB too),
32 GB VRAM,
Swap file size: 64 - 128 GB.
Speed and video length:
Runs very fast: 5 second (1280 x 864) Video: < 10 minutes.
Generation of long high quality videos in one run possible: 10 - 20 seconds without any issues,
Testrun: 30 second video (1024 x 704) tooks around 40 minutes without any OOM errors. Longer videos might be possible, but not tested yet.
Important:
This workflow is intended for advanced comfyui users who know how to install and operate the system and are able to resolve basic system errors themselves, like as node conflicts, or general system issues.
About this workflow:
This workflow is mainly based on the fantastic LTX-2.3 workflows of @Urabewe.
As far as I know, those were the first workflows running LTX-2 with 12 GB VRAM. All credits goes to the original creator.
My job was only to combine and organise the different workflows in a simple to use all-in-one design.