Local 2-Minute Kaiju News Broadcast: Full Workflow with MiniMax H3 and FLUX Keyframes
DullWorking7307 · reddit · 2026-08-21
A detailed breakdown of generating a 2-minute fake news broadcast (three-headed kaiju attack) entirely locally using MiniMax H3 (ComfyUI) and FLUX.2 keyframes on an RTX 5090.
Workflow:
- Video: MiniMax H3 for 768x1344@24fps shots; 15s takes 35-40 mins.
- Audio: Native H3 tracks only; no external TTS or lip-sync.
- Keyframes: FLUX.2 generation/inpainting, fed via r2v and AddGuide.
- Post: NVIDIA VSR upscaling; ffmpeg editing using hard cuts based on frame correlation (NCC 0.98).
- QA: Whisper transcription to catch model hallucinations.
Issues & Fixes:
- Long silent holds cause gibberish; trim takes instead of prompting.
- Subject scale is determined by the keyframe mask, not the prompt.
- i2v node lacks reference inputs; used r2v + AddGuide instead.
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