One-line prompt gets Codex to auto-produce a narrated product demo video
vista8 · x · 2026-11-11
With a single prompt — "use Cap CLI to record, use Doubao TTS to narrate" — the author had Codex automatically produce a complete demo video for their Mac menu-bar note app: 35 minutes of agent work yielded a 1:54 1080p video with Chinese voiceover and synced SRT subtitles, covering features like capture, OCR, Obsidian save and daily AI review, delivered as MP4 + Cap project + SRT. A reproducible "coding agent + screen-recording CLI + TTS" pipeline for product videos.
Related event: One Prompt Turns Codex into an Automated Product Demo Video Maker(2 posts)→
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