[FFmpeg-trac] #6448(undetermined:new): Gibberish Closed Captioning subtitle

[FFmpeg]

#6448: Gibberish Closed Captioning subtitle
-------------------------------------+-------------------------------------
             Reporter:  macdavis     |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:
              Version:  git-master   |  undetermined
             Keywords:  Closed       |               Resolution:
  Captioning                         |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by macdavis):

 {{{
 ffmpeg -i
 http://podcasts.apple.com/apple_keynotes_1080p/2017/wwdc_2017_1080_cc.m4v
 -vn -an out.srt
 ffmpeg version 3.3.2 Copyright (c) 2000-2017 the FFmpeg developers
   built with Apple LLVM version 8.1.0 (clang-802.0.42)
   configuration: --prefix=/usr/local --extra-cflags='-march=native
 -mtune=intel -m64 -O3 -pipe -fomit-frame-pointer -ftree-vectorize'
 --disable-runtime-cpudetect --disable-debug --disable-opencl --disable-
 avdevice --disable-ffplay --disable-ffprobe --disable-postproc --disable-
 ffserver --disable-devices --disable-avresample --disable-indev=qtkit
 --disable-doc --enable-pthreads --enable-version3 --enable-hardcoded-
 tables --enable-gpl --enable-nonfree
   libavutil      55. 58.100 / 55. 58.100
   libavcodec     57. 89.100 / 57. 89.100
   libavformat    57. 71.100 / 57. 71.100
   libavfilter     6. 82.100 /  6. 82.100
   libswscale      4.  6.100 /  4.  6.100
   libswresample   2.  7.100 /  2.  7.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
 'http://podcasts.apple.com/apple_keynotes_1080p/2017/wwdc_2017_1080_cc.m4v':
   Metadata:
     major_brand     : qt
     minor_version   : 537199360
     compatible_brands: qt
     creation_time   : 2017-06-06T23:34:44.000000Z
     com.apple.quicktime.player.movie.audio.gain: 1.000000
     com.apple.quicktime.player.movie.audio.treble: 0.000000
     com.apple.quicktime.player.movie.audio.bass: 0.000000
     com.apple.quicktime.player.movie.audio.balance: 0.000000
     com.apple.quicktime.player.movie.audio.pitchshift: 0.000000
     com.apple.quicktime.player.movie.audio.mute:
     com.apple.quicktime.player.movie.visual.brightness: 0.000000
     com.apple.quicktime.player.movie.visual.color: 1.000000
     com.apple.quicktime.player.movie.visual.tint: 0.000000
     com.apple.quicktime.player.movie.visual.contrast: 1.000000
     com.apple.quicktime.player.version: 7.6.6 (7.6.6)
     com.apple.quicktime.version: 7.7.3 (2978.7) 0x7738000 (Mac OS X,
 10.12.5, 16F73)
   Duration: 02:19:04.60, start: -0.012000, bitrate: 8099 kb/s
     Stream #0:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x800
 [SAR 1:1 DAR 12:5], 8000 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
 (default)
     Metadata:
       creation_time   : 2017-06-06T23:34:44.000000Z
       handler_name    : Apple Alias Data Handler
       encoder         : Elemental H.264
     Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo,
 fltp, 93 kb/s (default)
     Metadata:
       creation_time   : 2017-06-06T23:34:44.000000Z
       handler_name    : Apple Alias Data Handler
     Stream #0:2(eng): Subtitle: eia_608 (c608 / 0x38303663), 720x480, 0
 kb/s, SAR 174763:109227 DAR 174763:72818 (default)
     Metadata:
       rotate          : 0
       creation_time   : 2017-06-06T23:34:44.000000Z
       handler_name    : Apple Alias Data Handler
 Output #0, srt, to 'out.srt':
   Metadata:
     major_brand     : qt
     minor_version   : 537199360
     compatible_brands: qt
     com.apple.quicktime.version: 7.7.3 (2978.7) 0x7738000 (Mac OS X,
 10.12.5, 16F73)
     com.apple.quicktime.player.movie.audio.gain: 1.000000
     com.apple.quicktime.player.movie.audio.treble: 0.000000
     com.apple.quicktime.player.movie.audio.bass: 0.000000
     com.apple.quicktime.player.movie.audio.balance: 0.000000
     com.apple.quicktime.player.movie.audio.pitchshift: 0.000000
     com.apple.quicktime.player.movie.audio.mute:
     com.apple.quicktime.player.movie.visual.brightness: 0.000000
     com.apple.quicktime.player.movie.visual.color: 1.000000
     com.apple.quicktime.player.movie.visual.tint: 0.000000
     com.apple.quicktime.player.movie.visual.contrast: 1.000000
     com.apple.quicktime.player.version: 7.6.6 (7.6.6)
     encoder         : Lavf57.71.100
     Stream #0:0(eng): Subtitle: subrip (srt), 720x480 (default)
     Metadata:
       encoder         : Lavc57.89.100 srt
       creation_time   : 2017-06-06T23:34:44.000000Z
       handler_name    : Apple Alias Data Handler
 Stream mapping:
   Stream #0:2 -> #0:0 (eia_608 (cc_dec) -> subrip (srt))
 Press [q] to stop, [?] for help
 [Closed caption Decoder @ 0x7fa9fb009200] Data Ignored since exceeding
 screen width
     Last message repeated 7 times
 [Closed caption Decoder @ 0x7fa9fb009200] Data Ignored since exceeding
 screen width
     Last message repeated 43 times
 [Closed caption Decoder @ 0x7fa9fb009200] Data Ignored since exceeding
 screen width
     Last message repeated 27 times
 [Closed caption Decoder @ 0x7fa9fb009200] Data Ignored since exceeding
 screen width
     Last message repeated 33 times
 [Closed caption Decoder @ 0x7fa9fb009200] Data Ignored since exceeding
 screen width
     Last message repeated 19 times
 ... #(repeated messages and I have to terminate it)

 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
 video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: unknown
 Output file is empty, nothing was encoded (check -ss / -t / -frames
 parameters if used)
 Exiting normally, received signal 2
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6448#comment:1>
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