comfyui-workflows/optimized/image-to-video/minimax-h3-extension-master/README.md

MiniMax H3 Extension Master

Summary

Best-current MiniMax H3 imported-video extension master for the maintained optimized lane. It takes the proven MiniMax ref2v stack back into the Contex Loop family so an existing clip can be extended through a server-safe continuation workflow.

This variant keeps the Contex Loop existing-video flow, swaps to the proven INT8 base model, drops the Heretic text encoder, disables the failing MiniMaxH3MemoryEfficientSageAttentionPatch, and expands the continuation plan to 6 x 10s clips with review pauses disabled.

Status

• best-current-extension-master
• server-safe-loop-60s-test

Workflow asset

• workflow.json

Built from

• successful ComfyUI run cc74efa5-1a53-4b2a-9d7c-7170ea7eba5b
• the maintained MiniMax ref2v stack used in optimized/image-to-video/minimax-h3-r2v-master/
• earlier compact Contex Loop experiments that established the local-safe continuation budget

Key model stack

• minimax_h3_ref2va_pruned_int8_convrot.safetensors
• qwen3vl_32b_minimax_h3_nvfp4_awq.safetensors
• minimax_h3_video_vae_int8_convrot.safetensors
• minimax_h3_audio_vae_fp32.safetensors
• minimax\minimax_h3_ref2v_lightx2v_turbo_4step_v0.1_resized_avg_rank_20_bf16.safetensors

Main changes

• switches from the w4a8 loop stack to the successful int8 ref2v base
• replaces the Heretic encoder with qwen3vl_32b_minimax_h3_nvfp4_awq.safetensors
• keeps SolAttn, but bypasses MiniMaxH3MemoryEfficientSageAttentionPatch because it crashes on the current server
• sets prepend_original=false so the assembled output is a generated 60s continuation rather than source-plus-extension
• disables the review gate for unattended queue runs
• expands the plan to 6 x 10s continuation shots with continuity-first handoff

Why this is the kept extension master

• Chris's current extension path should live in the MiniMaxH3Chain* / Contex Loop family, not as a pile of separate optimized siblings
• it is the cleanest current bridge between the proven MiniMax ref2v stack and imported-video continuation
• it avoids the current live-server SageAttention failure path while preserving the stronger INT8 model route

Notes

• Queue with a real server-side source video override because the placeholder 1.mp4 is not present on the live ComfyUI box.
• This is intended as the first unattended minute-long loop test, not the final quality-maxed master.