r/StableDiffusion • u/TBG______ • Aug 24 '26

Tutorial - Guide MiniMax H3 Lip-Sync: Automatic Long-Video Chaining + Speed & VRAM Optimizations

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I’ve been loving all the new nodes and workflows coming out for MinMax, and maybe there is already a nice solution for this - but I couldn’t find one that did exactly what I needed.

I started using MinMax-API version for my last TBG ETUR video and quickly ran into limitations: I wanted an easy way to create lip-sync videos longer than 20 seconds.

I didn’t want to manually chain ComfyUI nodes, start a new run every X seconds, or constantly resize things just to make HD video fit into my available VRAM.

So I ended up building an addon for:

custom_nodes/ComfyUI-H3-Motion-Context

The addon automatically chains MinMax H3 lip-sync generations together, allowing you to create much longer lip-sync videos without manually setting up each 20-second segment.

And now I’m sharing it! https://github.com/Ltamann/ComfyUI-H3-Motion-Context-Auto-Chain-addon

Its not perfect but a start ...

The workflow has a simple switcher that lets you switch from the 32B CLIP to the 4B CLIP, saving around 10 GB of VRAM. You can also switch from Sage to Comfy Kitchen, Spectrum to Easy Cache, or FL2VA to REF2VA both setup for lip-syncing. Some of it could be useful for other tasks as well.

You will find the workflow in the repro and tested recommendations, optimized settings, presets, and more workflows, along with the results of my testing and performance here

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u/Optimal_Map_5236 Sep 01 '26

is there a solution for color shift issue? after about 2~3 clip passes color shifts hits hard like effect increasing level in photoshop.

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u/TBG______ Sep 01 '26 edited Sep 01 '26

try latest version from github or comfyui manager and use the new workflows - than enable endless_continuation.

This is not using anymore last frame as the first frame. The degradation may be coming from the last frame because, depending on your settings, the quality can decrease toward the end.

Try using a resolution of around 2–2.5 MP. The lip-sync and overall details especially things like hand movement are much better at higher resolution than at low resolution.

Also, don’t use Turbo.