check_clips.js

// 检查 clips 数据的有效性
const path = require('path');

console.log('[检查] 模拟 clips 数据验证...\n');

// 模拟可能的问题数据
const testCases = [
  {
    name: '正常数据',
    video: { start: 10, end: 20, duration: 10 }
  },
  {
    name: 'start 和 end 都是 0',
    video: { start: 0, end: 0, duration: 10 }
  },
  {
    name: 'end 小于 start',
    video: { start: 20, end: 10, duration: 10 }
  },
  {
    name: '缺少 start 和 end',
    video: { duration: 10 }
  },
  {
    name: '时长很短(小于淡入+淡出)',
    video: { start: 0, end: 0.8, duration: 0.8 }
  }
];

testCases.forEach(({ name, video }) => {
  console.log(`\n测试用例: ${name}`);
  console.log('  输入:', video);

  // 模拟 generator.cjs:2599-2601 的逻辑
  const clipStart = video.start || 0;
  const clipEnd = video.end ?? video.duration ?? 0;
  const clipDuration = Math.max(0, (clipEnd || 0) - clipStart) || (video.duration || 0);

  console.log('  处理后:');
  console.log('    clipStart:', clipStart);
  console.log('    clipEnd:', clipEnd);
  console.log('    clipDuration:', clipDuration);

  // 模拟 mapreduce-refactor.js:53 的逻辑
  const clipDur = clipEnd - clipStart;

  console.log('  Map-Reduce 计算:');
  console.log('    clipDur (clip.end - clip.start):', clipDur);

  // 模拟 mapreduce-refactor.js:65 的逻辑
  const fadeInDuration = 0.5;
  const fadeOutDuration = 0.5;
  const bodyDur = clipDur - fadeInDuration - fadeOutDuration;

  console.log('    bodyDur (clipDur - fadeIn - fadeOut):', bodyDur);

  if (bodyDur < 0) {
    console.log('    ❌ 负数!这会导致后续计算错误!');
  } else if (clipDur === 0) {
    console.log('    ❌ clipDur 为 0!');
  } else {
    console.log('    ✅ 正常');
  }
});

console.log('\n[检查] 完成');