[FFmpeg-trac] #2402(undetermined:new): FFmpeg marks all subtitles in mkv files as default

FFmpeg trac at avcodec.org
Mon Mar 25 14:58:19 CET 2013 

#2402: FFmpeg marks all subtitles in mkv files as default
-------------------------------------+-------------------------------------
             Reporter:  someuser     |                     Type:  defect
               Status:  new          |                 Priority:  minor
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 Some related discussion was in ticket #1815.

 When creating a Matroska / mkv file with FFmpeg with several subtitle
 streams all of them are marked as default and there seems to be no way to
 disable setting of the default flag for any of the subtitle streams.

 Below is an example with the presumably correct metadata identifier
 default-flag=0 in use.

 With both subtitles marked as default VLC shows the last subtitle stream
 but MPC-HC shows the first one (provided that no subtitle language
 preference has been set).

 How to reproduce:
 {{{
 > ./ffmpeg -fflags +genpts -i test.mp4 -i test-en.srt -i test-fr.srt -c:a
 copy -c:v copy -c:s copy -metadata:s:s:0 language=eng -metadata:s:s:1
 language=fra -metadata:s:s:1 default-flag=0 -map 0:0 -map 0:1 -map 1:0
 -map 2:0 test.mkv
 ffmpeg version N-51211-ge0e8c20 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Mar 22 2013 08:56:38 with gcc 4.7.2 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
 --enable-gnutls --enable-libass --enable-libbluray --enable-libcaca
 --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmp3lame
 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
 --enable-libopus --enable-librtmp --enable-libschroedinger --enable-
 libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-
 libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
 --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
   libavutil      52. 22.101 / 52. 22.101
   libavcodec     55.  1.100 / 55.  1.100
   libavformat    55.  0.100 / 55.  0.100
   libavdevice    55.  0.100 / 55.  0.100
   libavfilter     3. 48.100 /  3. 48.100
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     encoder         : Lavf54.59.106
   Duration: 00:00:10.05, start: 0.021333, bitrate: 1257 kb/s
     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
 576x324 [SAR 1:1 DAR 16:9], 1132 kb/s, 23.98 fps, 23.98 tbr, 11988 tbn,
 47.95 tbc
     Metadata:
       handler_name    : VideoHandler
     Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo,
 fltp, 119 kb/s
     Metadata:
       handler_name    : SoundHandler
 [srt @ 0272d9e0] Estimating duration from bitrate, this may be inaccurate
 Input #1, srt, from 'test-en.srt':
   Duration: N/A, bitrate: N/A
     Stream #1:0: Subtitle: subrip
 [srt @ 02861780] Estimating duration from bitrate, this may be inaccurate
 Input #2, srt, from 'test-fr.srt':
   Duration: N/A, bitrate: N/A
     Stream #2:0: Subtitle: subrip
 Output #0, matroska, to 'test.mkv':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     encoder         : Lavf55.0.100
     Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 576x324
 [SAR 1:1 DAR 16:9], q=2-31, 1132 kb/s, 23.98 fps, 1k tbn, 11988 tbc
     Metadata:
       handler_name    : VideoHandler
     Stream #0:1(und): Audio: aac ([255][0][0][0] / 0x00FF), 48000 Hz,
 stereo, 119 kb/s
     Metadata:
       handler_name    : SoundHandler
     Stream #0:2(eng): Subtitle: subrip
     Stream #0:3(fra): Subtitle: subrip
     Metadata:
       default-flag    : 0
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
   Stream #0:1 -> #0:1 (copy)
   Stream #1:0 -> #0:2 (copy)
   Stream #2:0 -> #0:3 (copy)
 Press [q] to stop, [?] for help
 frame=  241 fps=0.0 q=-1.0 Lsize=    1542kB time=00:00:10.04
 bitrate=1256.9kbits/s
 video:1389kB audio:146kB subtitle:0 global headers:0kB muxing overhead
 0.399761%
 > ffprobe -i test.mkv -loglevel 0 -show_streams
 [STREAM]
 index=0
 codec_name=h264
 codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
 profile=High
 codec_type=video
 codec_time_base=125/5994
 codec_tag_string=[0][0][0][0]
 codec_tag=0x0000
 width=576
 height=324
 has_b_frames=2
 sample_aspect_ratio=1:1
 display_aspect_ratio=16:9
 pix_fmt=yuv420p
 level=40
 timecode=N/A
 is_avc=1
 nal_length_size=4
 id=N/A
 r_frame_rate=2997/125
 avg_frame_rate=2997/125
 time_base=1/1000
 start_pts=0
 start_time=0.000000
 duration_ts=N/A
 duration=N/A
 bit_rate=N/A
 nb_frames=N/A
 nb_read_frames=N/A
 nb_read_packets=N/A
 DISPOSITION:default=1
 DISPOSITION:dub=0
 DISPOSITION:original=0
 DISPOSITION:comment=0
 DISPOSITION:lyrics=0
 DISPOSITION:karaoke=0
 DISPOSITION:forced=0
 DISPOSITION:hearing_impaired=0
 DISPOSITION:visual_impaired=0
 DISPOSITION:clean_effects=0
 DISPOSITION:attached_pic=0
 TAG:LANGUAGE=und
 TAG:HANDLER_NAME=VideoHandler
 [/STREAM]
 [STREAM]
 index=1
 codec_name=aac
 codec_long_name=AAC (Advanced Audio Coding)
 profile=unknown
 codec_type=audio
 codec_time_base=1/48000
 codec_tag_string=[0][0][0][0]
 codec_tag=0x0000
 sample_fmt=fltp
 sample_rate=48000
 channels=2
 bits_per_sample=0
 id=N/A
 r_frame_rate=0/0
 avg_frame_rate=0/0
 time_base=1/1000
 start_pts=0
 start_time=0.000000
 duration_ts=N/A
 duration=N/A
 bit_rate=N/A
 nb_frames=N/A
 nb_read_frames=N/A
 nb_read_packets=N/A
 DISPOSITION:default=1
 DISPOSITION:dub=0
 DISPOSITION:original=0
 DISPOSITION:comment=0
 DISPOSITION:lyrics=0
 DISPOSITION:karaoke=0
 DISPOSITION:forced=0
 DISPOSITION:hearing_impaired=0
 DISPOSITION:visual_impaired=0
 DISPOSITION:clean_effects=0
 DISPOSITION:attached_pic=0
 TAG:LANGUAGE=und
 TAG:HANDLER_NAME=SoundHandler
 [/STREAM]
 [STREAM]
 index=2
 codec_name=subrip
 codec_long_name=SubRip subtitle
 profile=unknown
 codec_type=subtitle
 codec_time_base=1/1000
 codec_tag_string=[0][0][0][0]
 codec_tag=0x0000
 id=N/A
 r_frame_rate=0/0
 avg_frame_rate=0/0
 time_base=1/1000
 start_pts=0
 start_time=0.000000
 duration_ts=N/A
 duration=N/A
 bit_rate=N/A
 nb_frames=N/A
 nb_read_frames=N/A
 nb_read_packets=N/A
 DISPOSITION:default=1
 DISPOSITION:dub=0
 DISPOSITION:original=0
 DISPOSITION:comment=0
 DISPOSITION:lyrics=0
 DISPOSITION:karaoke=0
 DISPOSITION:forced=0
 DISPOSITION:hearing_impaired=0
 DISPOSITION:visual_impaired=0
 DISPOSITION:clean_effects=0
 DISPOSITION:attached_pic=0
 TAG:LANGUAGE=eng
 [/STREAM]
 [STREAM]
 index=3
 codec_name=subrip
 codec_long_name=SubRip subtitle
 profile=unknown
 codec_type=subtitle
 codec_time_base=1/1000
 codec_tag_string=[0][0][0][0]
 codec_tag=0x0000
 id=N/A
 r_frame_rate=0/0
 avg_frame_rate=0/0
 time_base=1/1000
 start_pts=0
 start_time=0.000000
 duration_ts=N/A
 duration=N/A
 bit_rate=N/A
 nb_frames=N/A
 nb_read_frames=N/A
 nb_read_packets=N/A
 DISPOSITION:default=1
 DISPOSITION:dub=0
 DISPOSITION:original=0
 DISPOSITION:comment=0
 DISPOSITION:lyrics=0
 DISPOSITION:karaoke=0
 DISPOSITION:forced=0
 DISPOSITION:hearing_impaired=0
 DISPOSITION:visual_impaired=0
 DISPOSITION:clean_effects=0
 DISPOSITION:attached_pic=0
 TAG:LANGUAGE=fra
 TAG:DEFAULT-FLAG=0
 [/STREAM]
 >
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2402>
FFmpeg <http://ffmpeg.org>
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