[FFmpeg-user] ffmpeg extract hdmv pgs subtitle from mkv to srt or ssa

[Ramon Brea]

Sorry, here is the complete command line

Brea at Ramons-MacBook-Pro ~ % ffmpeg -i /Users/Brea/Desktop/Need\ To\ Convert/Video\ Files/Video\ 4\ \(1080p\).mkv -map 0:4 VideoEnglish1.srt
ffmpeg version 4.3 Copyright (c) 2000-2020 the FFmpeg developers
  built with Apple clang version 11.0.0 (clang-1100.0.33.8)
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libgsm --enable-appkit --enable-avfoundation --enable-coreimage --enable-audiotoolbox
  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
[matroska,webm @ 0x7f993d00be00] Could not find codec parameters for stream 4 (Subtitle: hdmv_pgs_subtitle (pgssub)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, matroska,webm, from '/Users/Brea/Desktop/Need To Convert/Video Files/Video 4 (1080p).mkv':
  Metadata:
    encoder         : libebml v1.3.6 + libmatroska v1.4.9
    creation_time   : 2018-10-22T23:45:00.000000Z
  Duration: 00:23:51.97, start: 0.000000, bitrate: 8538 kb/s
    Chapter #0:0: start 0.000000, end 45.045000
    Metadata:
      title           : Chapter 01
    Chapter #0:1: start 45.045000, end 135.010000
    Metadata:
      title           : Chapter 02
    Chapter #0:2: start 135.010000, end 898.064000
    Metadata:
      title           : Chapter 03
    Chapter #0:3: start 898.064000, end 1303.052000
    Metadata:
      title           : Chapter 04
    Chapter #0:4: start 1303.052000, end 1393.017000
    Metadata:
      title           : Chapter 05
    Chapter #0:5: start 1393.017000, end 1416.081000
    Metadata:
      title           : Chapter 06
    Chapter #0:6: start 1416.081000, end 1431.931000
    Metadata:
      title           : Chapter 07
    Stream #0:0(eng): Video: hevc (Main 10), yuv420p10le(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 23.98 tbc (default)
    Metadata:
      BPS-eng         : 4287652
      DURATION-eng    : 00:23:51.972000000
      NUMBER_OF_FRAMES-eng: 34333
      NUMBER_OF_BYTES-eng: 767474792
      _STATISTICS_WRITING_APP-eng: mkvmerge v28.0.0 ('Voice In My Head') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-10-22 23:45:00
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:1(eng): Audio: truehd, 48000 Hz, 5.1(side), s32 (24 bit) (default)
    Metadata:
      BPS-eng         : 2299565
      DURATION-eng    : 00:23:51.973000000
      NUMBER_OF_FRAMES-eng: 1718367
      NUMBER_OF_BYTES-eng: 411614490
      _STATISTICS_WRITING_APP-eng: mkvmerge v28.0.0 ('Voice In My Head') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-10-22 23:45:00
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:2(jpn): Audio: truehd, 48000 Hz, stereo, s32 (24 bit)
    Metadata:
      BPS-eng         : 837766
      DURATION-eng    : 00:23:51.973000000
      NUMBER_OF_FRAMES-eng: 1718367
      NUMBER_OF_BYTES-eng: 149957394
      _STATISTICS_WRITING_APP-eng: mkvmerge v28.0.0 ('Voice In My Head') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-10-22 23:45:00
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:3(eng): Audio: truehd, 48000 Hz, stereo, s32 (24 bit)
    Metadata:
      BPS-eng         : 911424
      DURATION-eng    : 00:23:51.973000000
      NUMBER_OF_FRAMES-eng: 1718367
      NUMBER_OF_BYTES-eng: 163141996
      _STATISTICS_WRITING_APP-eng: mkvmerge v28.0.0 ('Voice In My Head') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-10-22 23:45:00
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:4(eng): Subtitle: hdmv_pgs_subtitle (default)
    Metadata:
      title           : Signs / Songs
      BPS-eng         : 7215
      DURATION-eng    : 00:22:43.946000000
      NUMBER_OF_FRAMES-eng: 96
      NUMBER_OF_BYTES-eng: 1230263
      _STATISTICS_WRITING_APP-eng: mkvmerge v28.0.0 ('Voice In My Head') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-10-22 23:45:00
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:5(eng): Subtitle: hdmv_pgs_subtitle, 1920x1080
    Metadata:
      title           : Dialogue
      BPS-eng         : 47996
      DURATION-eng    : 00:23:47.009000000
      NUMBER_OF_FRAMES-eng: 769
      NUMBER_OF_BYTES-eng: 8561475
      _STATISTICS_WRITING_APP-eng: mkvmerge v28.0.0 ('Voice In My Head') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2018-10-22 23:45:00
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Stream mapping:
  Stream #0:4 -> #0:0 (hdmv_pgs_subtitle (pgssub) -> subrip (srt))
Subtitle encoding currently only possible from text to text or bitmap to bitmap