MiniMax H3 Extender Ref2VA

Summary

Imported MiniMax H3 continuation workflow based on tritant/ComfyUI_MiniMax_H3_Extender. This is a Ref2VA-first extender with shared image references, optional audio reference, Motion Context continuity, validated clip-by-clip reuse, and final joined video/audio decode.

Model Family

minimax

Status

imported-only

Source

Repo: https://github.com/tritant/ComfyUI_MiniMax_H3_Extender
Workflow file: https://github.com/tritant/ComfyUI_MiniMax_H3_Extender/blob/main/Workflow/MiniMax_Extender.json
Original publisher: tritant
Date imported: 2026-08-16

Developer notes

The upstream node is built around a single horizontal sequence node instead of a large repeated graph.
It keeps a validated disk cache, supports clip_by_clip and full_batch, and is explicitly designed for longer MiniMax H3 continuation chains.
The upstream README says it combines Ref2VA, Motion Context, disk caching, per-clip prompts, per-clip seeds, and final decode/export into a simpler flow.

Our notes

This import is worth keeping because it is natively reference-to-video oriented and closer to Chris's actual MiniMax use than generic t2v graphs.
I replaced the source repo's very specific demo clip script with a neutral reusable starter clip state so the imported workflow opens as a practical template instead of someone else's scene.
The graph still uses the upstream source-leaning stack, so it is more of a donor / comparison import than the first 3070 workflow to run.

Required custom nodes

ComfyUI_MiniMax_H3_Extender

Required models

MiniMax H3 Ref2VA checkpoint
matching MiniMax H3 text encoder
MiniMax H3 video VAE
MiniMax H3 audio VAE
optional turbo LoRA path if enabled

Notes

Use this when you want the upstream extender logic itself.
For the tighter local-first variant, use the optimized companion workflow in optimized/image-to-video/minimax-h3-extender-3070-r2v-480p-clip-by-clip/.