MiniMax H3-Max (Golden High-Fidelity Standard Suite)

This skill provides full technical instructions, training recipes, and native Apple Silicon M5 Max execution commands for MiniMax H3-Max with 6-step and 8-step high-fidelity DiT denoise.

1. Golden Standard Execution Baseline (6-8 Steps / 50 Layers / 73 Frames)

cd /Users/robzomb/Documents/antigravity/cool-hopper/h3-lora-lab

export H3_PROFILE=1
export H3_NAX=1
export H3_ZERO_COPY_WEIGHTS=1
export H3_REUSE_MPS_COMMAND=1
export H3_GPU_SAMPLER=1
export OMP_NUM_THREADS=12

caffeinate -dimsu nice -n -20 ./h3 --profile \
  -d "/Users/robzomb/h3-models/MiniMax-H3-PDD-8Step" \
  -p "YOUR_CINEMATIC_PROMPT" \
  --width 960 --height 544 \
  --frames 73 \
  --steps 8 \
  --layers 50 \
  --reuse 2 \
  --use-int8-row-fc2 \
  --seed 333 \
  -o "outputs/raw_video.mp4"

Golden Rules:

1. Canvas Geometry: Always use $960 \times 544$ (Width $\ge$ Height) to preserve 3D-RoPE rotary coordinate alignment and prevent body/limb stretching.
2. Causal Chunking: Always use $73$ frames ($17 \times 4 + 5$) for exactly 32 VAE tiles (cuts VAE decode to ~40s with zero padding).
3. Social Vertical Reels (9:16): Generate natively at $960 \times 544$ and master to $1080 \times 1920$ via FFmpeg hardware center crop.
4. Forbidden Flags: Never use --use-reference-rope (causes ghosting) or --sol-attn/--sol-cache (causes CPU locks).

2. 10-Bit Main10 Apple Native Mastering

# 16:9 Landscape Master (1920x1080)
ffmpeg -y -i raw.mp4 \
  -filter_complex "[0:v]scale=1920:1080:flags=lanczos+accurate_rnd+full_chroma_int+full_chroma_inp,cas=0.30,format=yuv420p10le[v];[0:a]aresample=48000,loudnorm=I=-14:TP=-1.0:LRA=11[a]" \
  -map "[v]" -map "[a]" \
  -c:v hevc_videotoolbox -profile:v main10 -pix_fmt p010le -b:v 80M -tag:v hvc1 -r 24 \
  -c:a aac -b:a 320k -ar 48000 -movflags +faststart master_1080p.mp4

# 9:16 Vertical Reel Master (1080x1920)
ffmpeg -y -i raw.mp4 \
  -filter_complex "[0:v]crop=ih*9/16:ih:(iw-ih*9/16)/2:0,scale=1080:1920:flags=lanczos+accurate_rnd+full_chroma_int+full_chroma_inp,cas=0.30,format=yuv420p10le[v];[0:a]aresample=48000,loudnorm=I=-14:TP=-1.0:LRA=11[a]" \
  -map "[v]" -map "[a]" \
  -c:v hevc_videotoolbox -profile:v main10 -pix_fmt p010le -b:v 80M -tag:v hvc1 -r 24 \
  -c:a aac -b:a 320k -ar 48000 -movflags +faststart master_reel_9x16.mp4