MiniMax H3 Ref2V pain points: 15-min renders, broken audio, wrong durations
yeah280 · reddit · 2026-09-07
A user testing MiniMax H3's Ref2V in ComfyUI for character/background replacement reports three problems: original audio isn't preserved, a 3-second video takes 15 minutes to generate, and output duration doesn't match the source. Their setup uses refvideo0/refaudio0 nodes, 20 steps at 24FPS, and a prompt asking to keep motion, camera, timing and audio while removing subtitles. Workflow JSON attached, seeking help on the wiring.
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