One still image → a 12.25 s video with sound (voice, one spoken line, room tone) where the face does not drift. Runs on a 16 GB GPU in 8 steps.

The trick: the same still goes into first_frame AND last_frame of MiniMaxH3ImageToVideo. With a first frame only, the face turned into another person around 6-8 s; anchoring both ends pins the identity while the motion in between stays free.

• 2 ComfyUI workflows (API format), core H3 nodes only: POV with one spoken line, and an oral variant
• Canvas sized to the still's aspect ratio (no squashed portraits)
• README with the prompt rules that fixed real defects: locked camera (no push-in), no wide-open mouth, anatomy wording, male fingernails, how to get exactly one spoken line
• Optional post-processing: GPEN face restoration with temporal smoothing, RIFE 48 fps with scene-cut detection

Multi-shot version (4-5 cuts, dialogue between characters): MiniMax H3 Multi-Shot Storyboard Workflow. Adults only: use generated, clearly mature characters.