MiniMax H3 Extender 3070 R2V 480p Clip By Clip

Summary

MiniMax H3 Extender optimized for Chris's actual MiniMax lane: reference-to-video first, incremental continuation, and safer 3070 execution. This variant keeps the extender's validated cache / clip approval model, but swaps it toward the lighter stack already used by the current local MiniMax extension masters.

Status

best-current-extender-r2v-safe-start

Workflow asset

workflow.json

Built from

models/minimax/minimax-h3-extender-ref2va/
upstream repo: tritant/ComfyUI_MiniMax_H3_Extender

Key model stack

minimax_h3_ref2va_pruned_w4a8_mixed.safetensors
qwen3vl_32b_heretic_minimax_h3_nvfp4.safetensors
minimax_h3_video_vae_int8_convrot.safetensors
minimax_h3_audio_vae_fp32.safetensors
minimax\minimax_h3_fl2v_lightx2v_turbo_4step_v0.1_comfy.safetensors

Main changes

switched the workflow to clip_by_clip so each clip can be generated, reviewed, and validated before the chain continues
reduced the working canvas from 896x576 to 864x480
raised the step count from 4 to 5 for a slightly less brittle low-step path
swapped the source stack toward the lighter local stack already used by the compact MiniMax continuation masters
replaced the source demo story with a neutral reusable R2V continuation starter in clips_json

Why this exists

the upstream extender logic is genuinely useful, but the shipped example is more optimistic than Chris's 3070 / 8 GB box wants
Chris's primary MiniMax lane is reference-to-video, so the optimized variant should open in an R2V-friendly continuation shape instead of generic batch-generation mode
clip_by_clip plus validation is a better fit than full_batch when trying to preserve continuity without wasting render time on bad downstream clips

Notes

This is the right workflow to test if the goal is "can the extender model be useful on the local box?"
It does not replace the current compact Contex Loop extension masters yet; it is the best direct Extender-style challenger to compare against them.
Start with one reference image, short 10s clips, and explicit subject_definitions blocks before scaling up.

2.2 KiB Raw Blame History