Opus 5.5 + Playwright 渲染 14 秒动效
不用 After Effects：Opus 5.5 写单文件 HTML，Playwright 逐帧截图、ffmpeg 混合，做出带运动模糊的 UI 动效短片。
14 SECONDS OF MOTION DESIGN. ZERO AFTER EFFECTS. JUST OPUS 5.5 + PLAYWRIGHT The trick is NOT the prompt. It is one rule: every frame is a pure function of time. song -> numpy beat grid -> Opus 5.5 writes one HTML file -> Playwright renders -> ffmpeg blends step 1 -> pick a royalty-free track around 120 BPM step 2 -> give Opus 5.5 8 to 12 UI states: button, loader, toggle, chart, command palette step 3 -> one HTML file, 1440x1440, every style computed inside seek(t). no CSS transitions, no timers step 4 -> springs as closed-form math, so any frame renders in any order step 5 -> numpy finds the beats, every UI sound lands on a measured peak step 6 -> Playwright shoots 4 subframes per frame, ffmpeg tmix blends them into 60fps motion blur step 7 -> render one frame per beat first, fix what is off the grid, then the full render the math: 120 BPM x 7 bars = 28 beats = 14 seconds 14 s x 60 fps x 4 subframes = 3,360 browser renders The template is public. Almost 10K people saved it in 15 hours. Most will paste it into a chat. The ones who get this result will run it in an agent that can open a browser.