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• Touble when excuting the same ffmpeg command for many times

  4 janvier 2015, par morndust

  Decription

  when using the same ffmpeg command for a couple of times, some of those will succeed, but, some of those would failed, ffmpeg report Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height or Invalid data found when processing input error.

  Input

  ffprobe

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/tmp/2137b8d42dcf4607a625755994133e69':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.4.101
  
    Duration: 00:01:00.02, start: 0.021333, bitrate: N/A
  
      Chapter #0.0: start 0.000000, end 60.000000
  
      Metadata:
  
        title           : 00:00:00.000
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x798 [SAR 1:1 DAR 320:133], 3255 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 192 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
      Stream #0:2(eng): Subtitle: mov_text (text / 0x74786574), 0 kb/s
  
      Metadata:
  
        handler_name    : SubtitleHandler

  Command

  /usr/local/bin/ffmpeg -i /tmp/2137b8d42dcf4607a625755994133e69 -f mp4 -b:v 3000k -r 24.0 -map_metadata -1 -vf scale=50:50 -y /tmp/foo.mp4

  Detail

  when i excute same command above 10 times, error would occur like 3 - 4 times.

  At the end, thanks for reading anyway, any answer would be appriciated.

• dts to m4a (aac) encoding - qaac, neroaacenc encoder output issues

  9 avril 2014, par user8979

  greets

  I want to encode a dts 5.1 audio source to m4a (aac) 5.1 with same playback duration.
  Intend to use either qaac or neroAacEnc.

  The output is the same per encoder with .mkv and .dts extracted from .mkv as input audio source.
  .mkv source piped to encoder using ffmpeg
  .dts source piped to encoder using ffmpeg and wavi with .avs input, .avs using NicAudio avisynth plugin, to decode .dts source for separate encodes to confirm if challenges encountered were from ffmpeg or elsewhere (both produced the same issues so concluded the issues originated from the respective encoders)

  • qaac output is same duration as .mkv
    issues : mediainfo reports output is 2ch while mediatab and ffmpeg report output is 5.1ch (lfe)

    mediainfo :

    Channel(s) : 2 channels
    Channel(s)_Original : 6 channels
    Channel positions : Front : L C R, Side : L R, LFE
    this channel position and channel combination is not possible, so which is it ?

    ffmpeg (5.1 info bold) :

    Stream #0:0(und) : Audio : aac, 5.1, fltp

    mediatab :

    Channel(s) : 6 channels
    ChannelPositions : Front : L C R, Side : L R, LFE

  • neroaacenc output has same channels, 5.1
    issue : ffmpeg reports output is longer than mkv audio track by 0.06 seconds (60 ms) and it begins after 0.054677 seconds (54.667 ms)

    Chapter #0.0 : start 0.054667

  Questions :

  1. qaac output
     
     • is the output stream 2ch or 5.1ch ?
     • if it is 2ch, what qaac option(s) leave the channels in output same as input AND report the correct channels ?
     • if the output is 5.1ch, does this mean every qaac output keeps the input channels (without using —chanmap or other such options) ? if so then its easy to ignore mediainfo channel information for qaac encodes.
       
       • why did mediainfo report 2ch ? could the stream report incorrect channels to a media player (implies incorrect playback) ? is there any way to get rid of the misleading channel information shown in mediainfo ? (expecting the information to be stored in the file, that is where would like to get rid of it)
  2. neroaacenc output
     • how can one ensure neroaacenc output is exact same duration as input ?
     • if not possible to change the output duration, does that mean when muxing audio with video, include the 54.667 ms delay to maintain sync ? (audio delay of -0.054667 s in this case) ?

  Commandlines were many so not included. Let me know if they would be helpful.

• FFMPEG subtitle : mov_text removal

  27 mars 2014, par user3461178

  I have problems with subtitles. My video playout can not play them. So I have been trying to remove it.

  C:\Users\Jakub\Desktop\eclipse\workspace\tvpohoda_archiv>"c:\\lib/ffmpeg/bin/ffm
  
  peg.exe" -i "videa/1050028-CITRON_-_Uz_zavrate_ridnou_c.m4v"  -sn -c:a copy -c:v
  
   copy  "videa/1050028-CITRON_-_Uz_zavrate_ridnou_c2.mov"
  
  ffmpeg version N-57650-gcb52d6d Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Oct 30 2013 20:35:46 with gcc 4.8.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa
  
  cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavp
  
  ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      52. 48.100 / 52. 48.100
  
    libavcodec     55. 39.100 / 55. 39.100
  
    libavformat    55. 19.104 / 55. 19.104
  
    libavdevice    55.  5.100 / 55.  5.100
  
    libavfilter     3. 90.100 /  3. 90.100
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'videa/1050028-CITRON_-_Uz_zavrate_ridno
  
  u_c.m4v':
  
    Metadata:
  
      major_brand     : M4V
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1
  
      encoder         : Lavf55.19.104
  
    Duration: 00:04:56.49, start: 0.021333, bitrate: 7239 kb/s
  
      Chapter #0.0: start 0.000000, end 296.400000
  
      Metadata:
  
        title           : Chapter 1
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x576 [
  
  SAR 212:225 DAR 53:45], 6997 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 24
  
  0 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
      Stream #0:2(eng): Subtitle: mov_text (text / 0x74786574)
  
      Metadata:
  
        handler_name    : SubtitleHandler
  
  File 'videa/1050028-CITRON_-_Uz_zavrate_ridnou_c2.mov' already exists. Overwrite
  
   ? [y/N] y
  
  Output #0, mov, to 'videa/1050028-CITRON_-_Uz_zavrate_ridnou_c2.mov':
  
    Metadata:
  
      major_brand     : M4V
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1
  
      encoder         : Lavf55.19.104
  
      Chapter #0.0: start 0.021000, end 296.421000
  
      Metadata:
  
        title           : Chapter 1
  
      Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 720x576 [SAR 212
  
  :225 DAR 53:45], q=2-31, 6997 kb/s, 25 fps, 12800 tbn, 12800 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, 240 kb/s
  
   (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  frame= 7408 fps=0.0 q=-1.0 Lsize=  262031kB time=00:04:56.49 bitrate=7239.9kbits
  
  /s
  
  video:253116kB audio:8700kB subtitle:0 global headers:0kB muxing overhead 0.0820
  
  40%

  Or :

  C:\Users\Jakub\Desktop\eclipse\workspace\tvpohoda_archiv>"c:\\lib/ffmpeg/bin/ffm
  
  peg.exe" -i "videa/1050028-CITRON_-_Uz_zavrate_ridnou_c.m4v"  -map 0:0 -map 0:1
  
  -c:a copy -c:v copy  "videa/1050028-CITRON_-_Uz_zavrate_ridnou_c2.mov"
  
  ffmpeg version N-57650-gcb52d6d Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Oct 30 2013 20:35:46 with gcc 4.8.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
  
  e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
  
  ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
  
  ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
  
  eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa
  
  cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavp
  
  ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      52. 48.100 / 52. 48.100
  
    libavcodec     55. 39.100 / 55. 39.100
  
    libavformat    55. 19.104 / 55. 19.104
  
    libavdevice    55.  5.100 / 55.  5.100
  
    libavfilter     3. 90.100 /  3. 90.100
  
    libswscale      2.  5.101 /  2.  5.101
  
    libswresample   0. 17.104 /  0. 17.104
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'videa/1050028-CITRON_-_Uz_zavrate_ridno
  
  u_c.m4v':
  
    Metadata:
  
      major_brand     : M4V
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1
  
      encoder         : Lavf55.19.104
  
    Duration: 00:04:56.49, start: 0.021333, bitrate: 7239 kb/s
  
      Chapter #0.0: start 0.000000, end 296.400000
  
      Metadata:
  
        title           : Chapter 1
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x576 [
  
  SAR 212:225 DAR 53:45], 6997 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 24
  
  0 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
      Stream #0:2(eng): Subtitle: mov_text (text / 0x74786574)
  
      Metadata:
  
        handler_name    : SubtitleHandler
  
  Output #0, mov, to 'videa/1050028-CITRON_-_Uz_zavrate_ridnou_c2.mov':
  
    Metadata:
  
      major_brand     : M4V
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1
  
      encoder         : Lavf55.19.104
  
      Chapter #0.0: start 0.021000, end 296.421000
  
      Metadata:
  
        title           : Chapter 1
  
      Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 720x576 [SAR 212
  
  :225 DAR 53:45], q=2-31, 6997 kb/s, 25 fps, 12800 tbn, 12800 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, 240 kb/s
  
   (default)
  
      Metadata:
  
        handler_name    : SoundHandler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  frame= 2702 fps=0.0 q=-1.0 size=   95498kB time=00:01:48.03 bitrate=7241.6kbits/
  
  frame= 4436 fps=4435 q=-1.0 size=  157319kB time=00:02:57.38 bitrate=7265.2kbits
  
  frame= 6296 fps=4196 q=-1.0 size=  223194kB time=00:04:11.77 bitrate=7262.0kbits
  
  frame= 7408 fps=4121 q=-1.0 Lsize=  262031kB time=00:04:56.49 bitrate=7239.9kbit
  
  s/s
  
  video:253116kB audio:8700kB subtitle:0 global headers:0kB muxing overhead 0.0820
  
  40%

  But it did not worked, subtitles have stayed there.

  i am normally starting this ffmpeg from java but this files are from command line

  Please can you help me ?