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在视频字幕生成场景中如何应用FireRedASR?

2025-08-30 1.4 K

视频字幕生成的完整工作流

专业级字幕制作方案:

  • pretreatment stage
    1. 用FFmpeg提取音轨:ffmpeg -i video.mp4 -vn -acodec pcm_s16le audio.wav
    2. 噪声抑制:python -m noisereduce -i audio.wav -o clean.wav
  • 高级参数配置
    • set up{'padding':800,'context':1500}保持语句连贯
    • 对于采访视频,添加diarization:true开启说话人分离

字幕后期处理技巧:
1. 用LLM版本生成初始文本
2. 通过AED版本的时间戳功能(修改transcribe.py添加return_timestamps=True)
3. 最终用Pysubs2库生成SRT/ASS格式字幕

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