Add option to use only subtitles marked with the "Forced" tag

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Issue #875 new
Giovanni Musto created an issue

Subtitles are really useful. They were used mainly by the hearing impaired people, but with the diffusion of the Internet they became very popular among all the people. There are three kind of subtitles: 1. The closed captions, for the hearing impaired people: they not only have a transcription of the dialogues, but they also include descriptions of the sounds that deaf people can't hear. 2. The subtitles in another language: in many countries where English, as a second language, is spoke by the largest part of the population it's common practice to distribute the movies without dubbing, but with subtitles. This kind of subtitles are also found in many home video supports, like DVDs and BDs. 3. The subtitles as a little help: even when movies are dubbed, there are some things that can't be translated, like some signs on the street or the speaking of a character in a foreign language (usually Russian). This kind of subtitles makes possible to distribute the same video file to all the countries, without having to burn the translation on screen. The localization team will then dub the movie if necessary and translate the subtitles.

When converting a DVD to MKV often both the "helper" subtitles and the closed captions are preserved, marking the former as "Forced". They are usually found before the closed captions, for example stream 0 is the video, stream 1 and 2 are two audio streams, stream 3 and 4 are the "helper" subtitles for both languages and stream 5 and 6 are the closed captions subtitles. Some files however don't have "helper" subtitles and Serviio would burn the closed captions.

What I'm requesting is an option to use the subtitles only if they're marked as "Forced".

Thank you in advance.

Comments (10)

  1. Petr Nejedly repo owner

    @Rapper_skull

    If you look at #730, it looks like there are Default / Forced subtitles and then after subs with a language code. That ticket suggest to use Forced/Default subs even if no language code is found.

    Can you post a few ffmpeg -i for your files to see what structure you're talking about?

  2. Petr Nejedly repo owner
    ffmpeg -i "/media.mkv"
    ffmpeg version N-75677-g16aac9a Copyright (c) 2000-2015 the FFmpeg developers
      built with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
      configuration: --prefix=/home/rapperskull/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/rapperskull/ffmpeg_build/include --extra-ldflags=-L/home/rapperskull/ffmpeg_build/lib --bindir=/home/rapperskull/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree --enable-librtmp
      libavutil      55.  2.100 / 55.  2.100
      libavcodec     57.  3.100 / 57.  3.100
      libavformat    57.  2.102 / 57.  2.102
      libavdevice    57.  0.100 / 57.  0.100
      libavfilter     6.  9.101 /  6.  9.101
      libswscale      4.  0.100 /  4.  0.100
      libswresample   2.  0.100 /  2.  0.100
      libpostproc    54.  0.100 / 54.  0.100
    Input #0, matroska,webm, from '/media.mkv':
      Metadata:
        title           : Avatar Extended Cut
        encoder         : libebml v1.3.0 + libmatroska v1.4.1
        creation_time   : 2014-02-13 15:42:08
      Duration: 02:58:09.70, start: 0.000000, bitrate: 2921 kb/s
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          title           : Chapter 36
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          title           : Chapter 40
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        Chapter #0:51: start 6713.581000, end 7110.895000
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        Chapter #0:55: start 7770.554000, end 7956.615000
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          title           : Chapter 56
        Chapter #0:56: start 7956.615000, end 8163.363000
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          title           : Chapter 57
        Chapter #0:57: start 8163.363000, end 8371.654000
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          title           : Chapter 58
        Chapter #0:58: start 8371.654000, end 8639.630000
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        Chapter #0:59: start 8639.630000, end 9005.079000
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        Chapter #0:60: start 9005.079000, end 9133.290000
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          title           : Chapter 61
        Chapter #0:61: start 9133.290000, end 9179.211000
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          title           : Chapter 62
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          title           : Chapter 63
        Chapter #0:63: start 9236.852000, end 9292.908000
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        Chapter #0:64: start 9292.908000, end 9602.259000
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          title           : Chapter 65
        Chapter #0:65: start 9602.259000, end 9645.886000
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        Chapter #0:66: start 9645.886000, end 9663.987000
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          title           : Chapter 67
        Chapter #0:67: start 9663.987000, end 9933.214000
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          title           : Chapter 68
        Chapter #0:68: start 9933.214000, end 9990.813000
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          title           : Chapter 69
        Chapter #0:69: start 9990.813000, end 10008.498000
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          title           : Chapter 70
        Chapter #0:70: start 10008.498000, end 10136.793000
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          title           : Chapter 71
        Chapter #0:71: start 10136.793000, end 10151.724000
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          title           : Chapter 72
        Chapter #0:72: start 10151.724000, end 10292.073000
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          title           : Chapter 73
        Chapter #0:73: start 10292.073000, end 10688.469000
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          title           : Chapter 74
        Chapter #0:74: start 10688.469000, end 10689.696000
        Metadata:
          title           : Chapter 75
        Stream #0:0: Video: hevc (Main), yuv420p(tv), 1920x1080, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 1k tbn, 1k tbc (default) (forced)
        Metadata:
          title           : Video H.265 (Encoded by ZMachine)
        Stream #0:1(ita): Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s (default)
        Metadata:
          title           : Audio AC3
        Stream #0:2(eng): Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s
        Metadata:
          title           : Audio AC3
        Stream #0:3(ita): Subtitle: ass (default) (forced)
        Metadata:
          title           : Sub Forced
        Stream #0:4(ita): Subtitle: ass
        Metadata:
          title           : Sub
        Stream #0:5(eng): Subtitle: ass
        Metadata:
          title           : Sub
    At least one output file must be specified
    
  3. Petr Nejedly repo owner

    I'm not sure how these 2 tickets should work together.

    One introduces a checkbox to Use default if not language is matched.

    I guess the same would work in your case, no?

  4. Giovanni Musto reporter

    Not exactly, since when a file does not contain the "forced" track, the normal one will be burned, while I don't want subtitles at all except for the forced ones.

  5. Petr Nejedly repo owner

    did you try to use 'forced' as a preferred language in the console? I think it could work and would do the thing that you need, no?

  6. Giovanni Musto reporter

    Unfortunately it does not work, since "forced" is just a flag and not the language.

  7. Giovanni Musto reporter

    Since 1.7 is adding a lot of audio and subtitles changes, do we have any chance to see this implemented in that version?

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