MiniMax H3 Long Video Extender v1.0: based on the ComfyUI_MiniMax_H3_Extender node by tritant. Chains multiple video clips with motion context, disk caching, dynamic image references, audio reference support, and seamless final video/audio decoding for long-form video generation.
# Required Custom Nodes
- ComfyUI_MiniMax_H3_Extender
- ComfyLiterals
#Update Minimax H3 v2.1:
Update all nodes to the latest available versions.
Fixed several issues in the workflow and refined some settings.
Minor workflow adjustments and improvements.
Minimax H3 workflow using Turbo LoRA for the fastest generation while maintaining high quality, with Speedup enabled and 6-8 sampling steps.
# Required Custom Nodes
Install the following custom nodes using ComfyUI Manager or clone them manually:
- ComfyUI-SolAttn_triton
- ComfyUI-Spectrum-MiniMax-H3
- ComfyUI-KJNodes
- ComfyUI-Custom-Scripts
- ComfyUI-Easy-Use
- ComfyUI-Workflow-Encrypt
- CRT-Nodes
- ComfyUI-VideoHelperSuite
- rgthree-comfy
- ComfyUI-VFI
- Nvidia_RTX_Nodes_ComfyUI
Description
Added full support for T2VA, I2VA, FL2VA, L2VA, and Ref2VA; added reference video and audio uploads; updated the interface.
FAQ
Comments (18)
Did you delete your latest post? i was checking it out live, and then it was gone.
I need to fix the workflow first. I’ll let you know once I’ve uploaded the updated version. Thank you for reporting the issue.
I’ve fixed the workflow and uploaded the updated version. Thank you again for reporting the issue.
@Caphaomuoi np, thanks for the wf!
This workflow is solid and very powerful, but I’ve spotted two issues. First, the "Video Combine 🎥🅥🅗🅢" node you're using is terrible; I suggest replacing it. It generates three files at once—two of which are useless and can't be disabled—and doesn't allow for a preview after the work is done. The second issue is that the "seed" is fixed, so generating repeatedly will just produce the exact same video over and over.
You can right-click the Video Combine node and select “Resume Preview” to preview the result after processing. I disabled it by default to reduce RAM usage, especially for lower-end machines.
As for the fixed seed, you’re right — I’ll change it so repeated generations don’t produce the exact same video.
The Video Combine node also outputs an additional PNG file containing the metadata. The video without audio is usually used as a reference file. Thank you.
I’ve changed the seed mode to Random now
I’ve already made the adjustments myself; I’m just letting you know about the issues I encountered. Although generating three image files and a video at once helps with VRAM usage, it makes organizing the output difficult. That said, your workflow is excellent—I really like it!
@a0978750321122 Thank you for the feedback, I really appreciate it!
You can stop Video Combine from writing extra files in ComfyUI → Settings. Search for VHS, then open:
🎥🅥🅗🅢 › Output
Turn these off:
Save png of first frame for metadata — stops the extra first-frame PNG
Keep required intermediate files after sucessful execution — deletes intermediates after a successful run (including the silent video when audio is muxed)
Both default to on, so extra files stay unless you disable them.
@jayjay881 Yes, most complex nodes have a question mark (?) in the top-right corner. The author provides very clear documentation on how to use the node; people just don’t usually pay attention to it.
I'm getting a weird persistent behavior where the camera pans to the right no matter how much I prompt for a steady shot. Happened across 6-7 different ref2va attempts. Speed and quality are great, but kind of sucks if the subject is almost completely out of frame by the end of the scene.
Solved, I swapped out the text encoder for a different one and the problem went away.
Please share the prompt you’re using, or provide a link to your video so I can take a look.
great workflow, learning a lot!
issue: both turbo lora strengths are labelled ref2v and inside the workflow they are linked to the opposite model they are intended to control
Edit: Fixed in v2. Thank you very much for pointing this out!
There is also a full screenshot showing the entire outer layer of the workflow in the showcase pictures.
@Caphaomuoi ok, just trying to understand. on the main workflow page, the subgraph for MODELS. are both inputs for model strentgh meant to be named ref2va? That's where it seems like the second input should be fl2va, then in the subsection they are linked to ref2va and fl2va respectively.
@vistramazed Thank you. I reviewed the naming again. [ref2va]LoRA_strength is assigned to [fl2va]LoRA_strength. The two connected lines do not affect the workflow, but they can be confusing, so I apologize for jumping to conclusions and blaming you too quickly.
(Edit: Fixed in v2. Thank you very much for pointing this out!)
Details
Files
minimaxH3T2VR2VFL2V_v19.txt
Mirrors
minimaxH3T2VR2VFL2V_v19.txt
minimaxH3T2VR2VFL2V_v20.txt
minimaxH3ExtenderForLongVideo_minimaxH3V20.txt
minimaxH3T2VR2VFL2V_v19.txt
minimaxH3T2VR2VFL2V_v15.txt
minimaxH3T2VR2VFL2V_v15.txt
minimaxH3T2VR2VFL2V_v11.txt
minimaxH3T2VR2VFL2V_v19.txt
minimaxH3T2VR2VFL2V_v19.txt
minimaxH3T2VR2VFL2V_v11.txt
minimaxH3T2VR2VFL2V_v11.txt
minimaxH3T2VR2VFL2V_v19.txt
Mirrors
minimaxH3T2VR2VFL2V_v19.txt
minimaxH3T2VR2VFL2V_v20.txt
minimaxH3ExtenderForLongVideo_minimaxH3V20.txt
minimaxH3T2VR2VFL2V_v19.txt
minimaxH3T2VR2VFL2V_v15.txt
minimaxH3T2VR2VFL2V_v15.txt
minimaxH3T2VR2VFL2V_v11.txt
minimaxH3T2VR2VFL2V_v19.txt
minimaxH3T2VR2VFL2V_v19.txt
minimaxH3T2VR2VFL2V_v11.txt
minimaxH3T2VR2VFL2V_v11.txt
minimaxH3T2VR2VFL2V_v19.txt
Mirrors
minimaxH3T2VR2VFL2V_v19.txt
minimaxH3T2VR2VFL2V_v20.txt
minimaxH3ExtenderForLongVideo_minimaxH3V20.txt
minimaxH3T2VR2VFL2V_v19.txt
minimaxH3T2VR2VFL2V_v15.txt
minimaxH3T2VR2VFL2V_v15.txt
minimaxH3T2VR2VFL2V_v11.txt
minimaxH3T2VR2VFL2V_v19.txt
minimaxH3T2VR2VFL2V_v19.txt
minimaxH3T2VR2VFL2V_v11.txt
minimaxH3T2VR2VFL2V_v11.txt
minimaxH3T2VR2VFL2V_v19.txt
Mirrors
minimaxH3T2VR2VFL2V_v19.txt
minimaxH3T2VR2VFL2V_v20.txt
minimaxH3ExtenderForLongVideo_minimaxH3V20.txt
minimaxH3T2VR2VFL2V_v19.txt
minimaxH3T2VR2VFL2V_v15.txt
minimaxH3T2VR2VFL2V_v15.txt
minimaxH3T2VR2VFL2V_v11.txt
minimaxH3T2VR2VFL2V_v19.txt
minimaxH3T2VR2VFL2V_v19.txt
minimaxH3T2VR2VFL2V_v11.txt
minimaxH3T2VR2VFL2V_v11.txt