HeyGen Avatar IV Prompt Formula Card: A Visual Guide to Structured Writing

Built on HeyGen Avatar IV's "photo + script → talking-head video" capability, this is a short explainer aimed at developers: the on-screen subject is a presenter holding prompt formula cards, with structured fields such as "subject / action / scene / style / quality" listed in layers on the cards, while the narration walks through, step by step, how to rewrite a vague description into a reusable prompt formula. In terms of composition, the source material is only a single front-facing photo, generated through the source pipeline and bound to image_url; the script is submitted through the prompt field of the author pipeline, the voice uses the schema's built-in explainer voice, the aspect ratio is 16:9 landscape to suit tutorials and embedded documentation scenarios, and the resolution is 1080p. It is suitable for model capability pages, prompt-writing tutorials, internal training, and product documentation illustration videos; it can also serve as a template starting point for "quickly producing multiple versions of explainer videos from the same photo." Note: the lip sync, facial expressions, and gestures in this work are all generated by the engine based on voice-driven input, and the final result depends on the source photo's quality and pose as well as the script length; specific duration, quotas, and commercial terms are subject to the official documentation.