ComfyUI-MiniMax-H3-Extend

ComfyUI-MiniMax-H3-Extend

What this does

1. MiniMaxH3VideoExtendPatched node (nodes.py) -- a standalone, directly-usable node exposing the above, plus injection of MiniMaxH3VideoExtend into comfy_extras.nodes_minimax_h3's own namespace (again, only if absent) so anything that looks it up by that name there -- e.g. ComfyUI-H3-Cast's H3CastToVideoExtend -- finds a working implementation transparently, no changes of its own needed.

2. MiniMaxH3EncodeAVPatched node (nodes.py) -- vae-encodes video frames (+ optional audio) into the AV latent MiniMaxH3VideoExtendPatched's (or the native node's) context_latent input needs, for feeding an externally-loaded prior clip (e.g. VHS_LoadVideo) into either. Vendored from the native MiniMaxH3EncodeAV, which isn't part of stock/public support either. Lives here rather than in ComfyUI-H3-Cast since it's an extend/continuation concern, not a cast/character one -- also injected into the native namespace the same way as MiniMaxH3VideoExtend above.

Confirmed working via live testing (2026-08-11) across text-to-video, reference-to-video, and cast-to-video continuation. Recommended starting settings: context_frames 2, ref_spacing 1-2, ref_decay 0.3, ref_ramp 3-4 (5-6 if the prior clip had more motion than usual).

Install

Same as any custom node pack -- clone into custom_nodes/, restart ComfyUI. No core ComfyUI files are edited; everything is monkey-patched in memory at import time. To remove: delete this folder, restart.