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软硬字幕的提取方法

Posted on Valine:

软字幕

mkvtoolnix 好多人推荐这个，试了一下感觉没有什么过人之处
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choco install gmkvextractgui

choco install mkvtoolnix
ffmpeg
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ffmpeg -i input.mkv -map 0:s:0 out.ass

使用0:s:1导出第二轨道，0:s:2导出第三轨道，依次

字幕格式可以自定义srt或者ass

测试输出

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PS D:\> ffmpeg -i .\[喜剧之王].King.of.Comedy.1999.WEB-DL.1080P.H264.AAC.国粤双语.内封简繁-OPS.mkv -map 0:s:0 out.ass
ffmpeg version 4.3.2-2021-02-20-essentials_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10.2.0 (Rev6, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, matroska,webm, from '.\[喜剧之王].King.of.Comedy.1999.WEB-DL.1080P.H264.AAC.国粤双语.内封简繁-OPS.mkv':
  Metadata:
    title           : 电影烧包
    encoder         : libebml v1.3.4 + libmatroska v1.4.5
    creation_time   : 2019-01-30T18:31:54.000000Z
  Duration: 01:28:28.01, start: 0.000000, bitrate: 8696 kb/s
    Stream #0:0(chi): Video: h264 (Constrained Baseline), yuv420p(progressive), 1920x1080, SAR 1:1 DAR 16:9, 24 fps, 24 tbr, 1k tbn, 48 tbc (default) (forced)
    Metadata:
      title           : 喜剧之王.电影烧包@老幺
      BPS             : 8234109
      BPS-eng         : 8234109
      DURATION        : 01:28:28.008000000
      DURATION-eng    : 01:28:28.008000000
      NUMBER_OF_FRAMES: 106166
      NUMBER_OF_FRAMES-eng: 106166
      NUMBER_OF_BYTES : 5463340171
      NUMBER_OF_BYTES-eng: 5463340171
      _STATISTICS_WRITING_APP: mkvmerge v9.4.0 ('Knurl') 64bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v9.4.0 ('Knurl') 64bit
      _STATISTICS_WRITING_DATE_UTC: 2019-01-30 18:31:54
      _STATISTICS_WRITING_DATE_UTC-eng: 2019-01-30 18:31:54
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:1(chi): Audio: aac (LC), 44100 Hz, stereo, fltp (default) (forced)
    Metadata:
      title           : Mandarin
      BPS             : 228924
      BPS-eng         : 228924
      DURATION        : 01:28:27.942000000
      DURATION-eng    : 01:28:27.942000000
      NUMBER_OF_FRAMES: 228594
      NUMBER_OF_FRAMES-eng: 228594
      NUMBER_OF_BYTES : 151889909
      NUMBER_OF_BYTES-eng: 151889909
      _STATISTICS_WRITING_APP: mkvmerge v9.4.0 ('Knurl') 64bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v9.4.0 ('Knurl') 64bit
      _STATISTICS_WRITING_DATE_UTC: 2019-01-30 18:31:54
      _STATISTICS_WRITING_DATE_UTC-eng: 2019-01-30 18:31:54
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:2(chi): Audio: aac (LC), 44100 Hz, stereo, fltp
    Metadata:
      title           : Cantonese
      BPS             : 229270
      BPS-eng         : 229270
      DURATION        : 01:28:27.872000000
      DURATION-eng    : 01:28:27.872000000
      NUMBER_OF_FRAMES: 228591
      NUMBER_OF_FRAMES-eng: 228591
      NUMBER_OF_BYTES : 152117547
      NUMBER_OF_BYTES-eng: 152117547
      _STATISTICS_WRITING_APP: mkvmerge v9.4.0 ('Knurl') 64bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v9.4.0 ('Knurl') 64bit
      _STATISTICS_WRITING_DATE_UTC: 2019-01-30 18:31:54
      _STATISTICS_WRITING_DATE_UTC-eng: 2019-01-30 18:31:54
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:3(chi): Subtitle: ass (default) (forced)
    Metadata:
      title           : ASS中简
      BPS             : 101
      BPS-eng         : 101
      DURATION        : 01:26:18.360000000
      DURATION-eng    : 01:26:18.360000000
      NUMBER_OF_FRAMES: 1386
      NUMBER_OF_FRAMES-eng: 1386
      NUMBER_OF_BYTES : 65992
      NUMBER_OF_BYTES-eng: 65992
      _STATISTICS_WRITING_APP: mkvmerge v9.4.0 ('Knurl') 64bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v9.4.0 ('Knurl') 64bit
      _STATISTICS_WRITING_DATE_UTC: 2019-01-30 18:31:54
      _STATISTICS_WRITING_DATE_UTC-eng: 2019-01-30 18:31:54
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:4(chi): Subtitle: ass
    Metadata:
      title           : ASS中繁
      BPS             : 101
      BPS-eng         : 101
      DURATION        : 01:26:18.360000000
      DURATION-eng    : 01:26:18.360000000
      NUMBER_OF_FRAMES: 1386
      NUMBER_OF_FRAMES-eng: 1386
      NUMBER_OF_BYTES : 65992
      NUMBER_OF_BYTES-eng: 65992
      _STATISTICS_WRITING_APP: mkvmerge v9.4.0 ('Knurl') 64bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v9.4.0 ('Knurl') 64bit
      _STATISTICS_WRITING_DATE_UTC: 2019-01-30 18:31:54
      _STATISTICS_WRITING_DATE_UTC-eng: 2019-01-30 18:31:54
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:5: Video: mjpeg (Baseline), yuvj444p(pc, bt470bg/unknown/unknown), 728x1080 [SAR 1:1 DAR 91:135], 90k tbr, 90k tbn, 90k tbc (attached pic)
    Metadata:
      filename        : cover x.jpg
      mimetype        : image/jpeg
Output #0, ass, to 'out.ass':
  Metadata:
    title           : 电影烧包
    encoder         : Lavf58.45.100
    Stream #0:0(chi): Subtitle: ass (ssa) (default) (forced)
    Metadata:
      title           : ASS中简
      BPS             : 101
      BPS-eng         : 101
      DURATION        : 01:26:18.360000000
      DURATION-eng    : 01:26:18.360000000
      NUMBER_OF_FRAMES: 1386
      NUMBER_OF_FRAMES-eng: 1386
      NUMBER_OF_BYTES : 65992
      NUMBER_OF_BYTES-eng: 65992
      _STATISTICS_WRITING_APP: mkvmerge v9.4.0 ('Knurl') 64bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v9.4.0 ('Knurl') 64bit
      _STATISTICS_WRITING_DATE_UTC: 2019-01-30 18:31:54
      _STATISTICS_WRITING_DATE_UTC-eng: 2019-01-30 18:31:54
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      encoder         : Lavc58.91.100 ssa
Stream mapping:
  Stream #0:3 -> #0:0 (ass (ssa) -> ass (ssa))
Press [q] to stop, [?] for help
size=     106kB time=01:26:18.09 bitrate=   0.2kbits/s speed=5.17e+03x
video:0kB audio:0kB subtitle:64kB other streams:0kB global headers:1kB muxing overhead: 64.182022%

potplayer也可以, 不过试了一下,是边播放边导出~~~

硬字幕

videocor
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# 先安装ocr识别引擎
https://github.com/UB-Mannheim/tesseract/wiki

# 再安装
pip install videocr

# 安装python-Levenshtein 会报错 error: Microsoft Visual C++ 14.0 is required. Get it with "Build Tools for Visual Studio": https://visualstudio.microsoft.com/downloads/

手动安装库（推荐） https://www.lfd.uci.edu/~gohlke/pythonlibs/
自动安装库
https://visualstudio.microsoft.com/zh-hans/visual-cpp-build-tools/
http://go.microsoft.com/fwlink/?LinkId=691126

# 只提供了命令行运行，基本指定好视频文件位置，就能用了，过程中消耗大量的cpu，并且需要在线识别，所以有流量走动
subtitle edit

不具体写了, 如下图

需要注意的是，videocor 这个软件会被自带杀毒软件扫描，杀毒软件会占用大量cpu，所以建议关闭windows defender 自动扫描

至于效果嘛, 如果是sub图像字幕, 识别率还可以, 后面手动调整一下, 不是的话, 就很感人, 建议还是能找字幕, 就找字幕吧.