写按节拍卡点的混剪分镜表

只是写法示意，不是完整程序。

// ANS 音乐 BPM 节拍时间点自动对齐计算器 (ans-montage-timeline.ts)
export function computeAnsBeatCutTimes(bpm: number, durationSec: number, beatsPerCut = 4) {
  const interval = (60 / Math.max(40, bpm)) * beatsPerCut;
  const cuts: number[] = [];
  for (let t = 0; t < durationSec; t += interval) cuts.push(+t.toFixed(3));
  return cuts;
}