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如何使用 ffmpeg 將字幕刻錄到檔案中？

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如何使用 ffmpeg 將字幕刻錄到檔案中？

我在同一資料夾中有一個名為 test.m4a 和 test.srt 的檔案。

如何將字幕刻錄為 m4a？

我得到的輸出是：

Korays-MacBook-Pro:~ koraytugay$ ./ffmpeg -i test.m4v -vf subtitles=test.srt out.m4v
ffmpeg version 2.4.2 Copyright (c) 2000-2014 the FFmpeg developers
  built on Oct  8 2014 19:37:09 with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
  configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --enable-libvidstab --enable-libx265 --arch=x86_64 --enable-runtime-cpudetect
  libavutil      54.  7.100 / 54.  7.100
  libavcodec     56.  1.100 / 56.  1.100
  libavformat    56.  4.101 / 56.  4.101
  libavdevice    56.  0.100 / 56.  0.100
  libavfilter     5.  1.100 /  5.  1.100
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  0.100 / 53.  0.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fca6201e000] stream 0, timescale not set
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fca6201e000] Could not find codec parameters for stream 1 (Video: none (drmi / 0x696D7264), 640x478, 1389 kb/s): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fca6201e000] Could not find codec parameters for stream 2 (Subtitle: none (p608 / 0x38303670), 853x478, 0 kb/s): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.m4v':
  Metadata:
    major_brand     : M4V 
    minor_version   : 0
    compatible_brands: M4V mp42isom
    creation_time   : 2014-06-09 19:13:04
    title           : Day 1: 2:00 A.M. - 3:00 A.M.
    artist          : 24
    album_artist    : 24
    album           : 24
    genre           : Drama
    track           : 3
    disc            : 1/1
    compilation     : 0
    gapless_playback: 0
    date            : 2001-11-20T08:00:00Z
    copyright       : © 2001 Twentieth Century Fox Film Corporation
    description     : Jack verifies the key card was encrypted on Nina's computer.
    show            : 24
    episode_id      : 1AFF02 
    season_number   : 1
    episode_sort    : 3
    media_type      : 10
    synopsis        : Kimberly and Janet find themselves in great danger and must look for an escape route.  In her search for Kimberly, Teri has found help from Janet's father Alan York.  Meanwhile, Palmer attends a secret meeting about disturbing news that is about to break,
    iTunMOVI        : <?xml version="1.0" encoding="UTF-8"?>
                    : <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
                    : <plist version="1.0">
                    : <dict>
                    :   <key>asset-info</key>
                    :   <dict>
                    :       <key>closed-captioned</key>
                    :       <true/>
                    :       <key>file-size</key>
                    :       <integer>484838754</integer>
                    :       <key>flavor</key>
                    :       <string>4:640x480LC-128</string>
                    :       <key>screen-format</key>
                    :       <string>widescreen</string>
                    :   </dict>
                    : </dict>
                    : </plist>
                    : 
  Duration: 00:42:30.01, start: 0.000000, bitrate: 1521 kb/s
    Stream #0:0(eng): Audio: aac (drms / 0x736D7264), 44100 Hz, stereo, fltp, 124 kb/s (default)
    Metadata:
      creation_time   : 2014-06-09 19:13:04
      handler_name    : Apple Sound Media Handler
    Stream #0:1(eng): Video: none (drmi / 0x696D7264), 640x478, 1389 kb/s, SAR 4:3 DAR 1280:717, 23.98 fps, 23.98 tbr, 2997 tbn, 2997 tbc (default)
    Metadata:
      creation_time   : 2014-06-09 19:13:04
      handler_name    : Apple Video Media Handler
    Stream #0:2(eng): Subtitle: none (p608 / 0x38303670), 853x478, 0 kb/s (default)
    Metadata:
      creation_time   : 2014-06-09 19:13:04
      handler_name    : Apple Closed Caption Media Handler
    Stream #0:3: Video: mjpeg, yuvj444p(pc, bt470bg), 1400x1400 [SAR 300:300 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
[AVFilterGraph @ 0x7fca61e133e0] No such filter: 'subtitles'
Error opening filters!
Korays-MacBook-Pro:~ koraytugay$

答案1

喜歡維基頁面提到，您的 ffmpeg 版本需要使用--enable-libass字幕過濾器選項進行編譯才能運作。您的似乎是一個構建，不幸的是沒有。

最簡單的方法是使用自製。

然後安裝ffmpeg：

brew install ffmpeg

然後，再試一次：

ffmpeg -i test.m4v -vf subtitles=test.srt -c:a copy out.m4v

請務必閱讀H.264編碼指南了解如何設定輸出品質。

請注意，您無法轉換 DRM 加密的文件，例如範例中的文件（請參閱視訊編解碼器drmi）。這是一公開票對於ffmpeg，但不太可能解決。

答案2

我最終在 Parallels 上運行的 Windows 中使用了 vidcoder 1.5.22。

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