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如何实现教育类视频的自动化字幕生成与说话人标注?

2025-08-23 1.1 K

教育视频字幕生成需要特别关注术语准确性和说话人对应关系:

Customized Solutions

  • 学科词典导入:在config目录添加专业术语词典(如medical_terms.txt)提升识别率
  • 说话人注册系统:为固定教师预先录制声纹样本,命名保存为teacher_voice.wav
  • 语速适配: Settingsmax_sentence_length参数调整断句长度(建议8-12秒)

Specific implementation steps

  1. utilizationffmpeg -i lecture.mp4 -vn lecture.wav提取纯净音频
  2. Set in config.yaml:
    speaker_profiles: [teacher,student1,student2]
    dictionary_path: config/edu_terms.txt
  3. 运行主程序后,用正则表达式批量替换术语(如将”DNA”统一替换为”脱氧核糖核酸”)

教学场景特化技巧

1. 对问答环节启用speaker_transition_threshold=0.3提高切换灵敏度
2. 添加[黑板板书]等场景标注
3. 输出双语字幕时保留时间戳对齐

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