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• ffmpeg command failed

  25 octobre 2015, par Asad kamran

  I am experimenting FFMPEG command to convert any video format to mp4.

  Server admin execute the below command created by me and show me the errors :

  ffmpeg -ss 00:03:00  -i  /video/1444107854.mov -c:v libx264 /video/player/1444107854.mp4  -vframes 1 /video/thumb/1444107854.jpg

  This is error :

  [aac @ 0x2b845a0] The encoder ’aac’ is experimental but experimental
  codecs are not enabled, add ’-strict -2’ if you want to use it.

  how can i avoid this error and also experimental codec, so can any one let me know what can be best codec if i explicitly specify it.

  my ffmpeg and server are as follow :

  ffmpeg version N-75903-g14573b9 Copyright (c) 2000-2015 the FFmpeg
  developers built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-16)

  EDIT 1 :
  I change the command a bit and add -c:a copy to copy audio stream as it is but still no hope :

  New command :

  ffmpeg -ss 00:03:00  -i  /video/1444107854.mov -c:v libx264 -c:a copy /video/player/1444107854.mp4  -vframes 1 /video/thumb/1444107854.jpg

  After executing this i got a file of 23k size, apparently as in log it only copy audio stream and no video is added in final output.
  Its Log is as follow :

  > ffmpeg version N-75903-g14573b9 Copyright (c) 2000-2015 the FFmpeg
  
  > developers   built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-16)  
  
  > configuration: --enable-libx264 --enable-gpl   libavutil      55. 
  
  > 3.100 / 55.  3.100   libavcodec     57.  5.100 / 57.  5.100   libavformat    57.  3.100 / 57.  3.100   libavdevice    57.  0.100 /
  
  > 57.  0.100   libavfilter     6. 10.100 /  6. 10.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 /  2.  0.100   libpostproc    54.  0.100 / 54.  0.100 Input #0, mpeg, from
  
  > '/video/1444108714.mpg':  
  
  > Duration: 00:00:02.14, start: 0.184278, bitrate: 15689 kb/s
  
  >     Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], max. 38810 kb/s, 29.97 fps, 29.97 tbr,
  
  > 90k tbn, 59.94 tbc
  
  >     Stream #0:1[0x80]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s [swscaler @ 0x347fda0] deprecated pixel format used, make sure you did
  
  > set range correctly [libx264 @ 0x34708a0] using SAR=1/1 [libx264 @
  
  > 0x34708a0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 [libx264
  
  > @ 0x34708a0] profile High, level 4.0 [libx264 @ 0x34708a0] 264 - core
  
  > 148 r2597 e86f3a1 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 -
  
  > http://www.videolan.org/x264.html - options: cabac=1 ref=3
  
  > deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00
  
  > mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0
  
  > deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=34
  
  > lookahead_threads=5 sliced_threads=0 nr=0 decimate=1 interlaced=0
  
  > bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1
  
  > b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250
  
  > keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf
  
  > mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40
  
  > aq=1:1.00 [mp4 @ 0x346f6c0] Codec for stream 1 does not use global
  
  > headers but container format requires global headers [mp4 @ 0x346f6c0]
  
  > track 1: codec frame size is not set Output #0, mp4, to
  
  > '/video/player/1444108714.mp4':  
  
  > Metadata:
  
  >     encoder         : Lavf57.3.100
  
  >     Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 29.97 fps, 30k tbn,
  
  > 29.97 tbc
  
  >     Metadata:
  
  >       encoder         : Lavc57.5.100 libx264
  
  >     Stream #0:1: Audio: ac3 ([165][0][0][0] / 0x00A5), 48000 Hz, 5.1(side), 448 kb/s Output #1, image2, to '/video/thumb/1444108714.jpg':  
  
  > Metadata:
  
  >     encoder         : Lavf57.3.100
  
  >     Stream #1:0: Video: mjpeg, yuvj420p(pc), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc
  
  >     Metadata:
  
  >       encoder         : Lavc57.5.100 mjpeg Stream mapping:   Stream #0:0 -> #0:0 (mpeg2video (native) -> h264 (libx264))   Stream #0:1 -> #0:1 (copy)   Stream #0:0 -> #1:0 (mpeg2video (native) -> mjpeg (native)) Press [q] to stop, [?] for help [mp4 @ 0x346f6c0]
  
  > Non-monotonous DTS in output stream 0:1; previous: 2208, current: 672;
  
  > changing to 2209. This may result in incorrect timestamps in the
  
  > output file. frame=    0 fps=0.0 q=0.0 Lq=0.0 size=      23kB
  
  > time=00:00:00.07 bitrate=2447.5kbits/s video:0kB audio:23kB
  
  > subtitle:0kB other streams:0kB global headers:0kB muxing overhead:
  
  > 3.457839%

  EDIT 2 :

  ffmpeg -y -i ./1445675270.m4b -c:v libx264  -crf 20 -preset slow -pix_fmt yuv420p -movflags +faststart -c:a libfdk_aac -b:a 128k  ./player/1445675270.mp4 -vframes 1 ./thumb/1445675270.jpg

  Above command output the below message, i will appreciate if you can suggest.

  ffmpeg version git-2015-10-11-49f4967 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-16)
  
    configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --pkg-config-flags=--static --enable-gpl --enable-nonfree --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265
  
    libavutil      55.  3.100 / 55.  3.100
  
    libavcodec     57.  5.100 / 57.  5.100
  
    libavformat    57.  3.100 / 57.  3.100
  
    libavdevice    57.  0.100 / 57.  0.100
  
    libavfilter     6. 11.100 /  6. 11.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.100 /  2.  0.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x31e07c0] stream 0, timescale not set
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './1445675270.m4b':
  
    Metadata:
  
      major_brand     : M4A 
  
      minor_version   : 0
  
      compatible_brands: M4A mp42isom
  
      creation_time   : 2005-08-01 07:26:16
  
      tool            : ?
  
      title           : MAKE_2005-08-01
  
      artist          : MAKE Magazine
  
      composer        : MAKE Magazine - Phillip Torrone
  
      album           : Interview with Janus Wireless
  
      grouping        : MAKE Magazine enhanced podcast
  
      genre           : Podcast
  
      date            : 2005
  
      comment         : Interview with Janus wireless and their 5 Wi-Fi card packet capturing Linux box. This is a special enhanced podcast (this file plays images and links in iTunes and on iPod color devices).
  
    Duration: 00:02:57.54, start: 0.000000, bitrate: 162 kb/s
  
      Chapter #0:0: start 0.000000, end 17.000000
  
      Metadata:
  
        title           : MAKE Magazine @ DEFCON with JANUS
  
      Chapter #0:1: start 17.000000, end 37.000000
  
      Metadata:
  
        title           : Janus
  
      Chapter #0:2: start 37.000000, end 83.000000
  
      Metadata:
  
        title           : Construction
  
      Chapter #0:3: start 83.000000, end 109.000000
  
      Metadata:
  
        title           : The MAKERs
  
      Chapter #0:4: start 109.000000, end 177.540000
  
      Metadata:
  
        title           : Display
  
      Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 22050 Hz, mono, fltp, 32 kb/s (default)
  
      Metadata:
  
        creation_time   : 2005-08-01 07:26:16
  
        handler_name    : ?Apple Alias Data Handler
  
      Stream #0:1(eng): Subtitle: mov_text (text / 0x74786574), 0 kb/s
  
      Metadata:
  
        creation_time   : 2005-08-01 07:26:16
  
        handler_name    : ?Apple Alias Data Handler
  
      Stream #0:2(eng): Video: tiff (tiff / 0x66666974), rgb24, 167x166, 126 kb/s, SAR 206:275 DAR 17201:22825, 0.03 fps, 1 tbr, 22050 tbn, 22050 tbc (default)
  
      Metadata:
  
        creation_time   : 2005-08-01 07:26:16
  
        handler_name    : ?Apple Alias Data Handler
  
        encoder         : TIFF (Uncompressed)
  
      Stream #0:3(eng): Subtitle: mov_text (tx3g / 0x67337874), 160x160, 0 kb/s (default)
  
      Metadata:
  
        creation_time   : 2005-08-01 07:26:16
  
        handler_name    : ?Apple Alias Data Handler
  
      Stream #0:4: Video: mjpeg, yuvj444p(pc, bt470bg/unknown/unknown), 167x166 [SAR 1:1 DAR 167:166], 90k tbr, 90k tbn, 90k tbc
  
  [swscaler @ 0x3242360] deprecated pixel format used, make sure you did set range correctly
  
  [libx264 @ 0x3228c40] width not divisible by 2 (167x166)
  
  Output #0, mp4, to './player/1445675270.mp4':
  
    Metadata:
  
      major_brand     : M4A 
  
      minor_version   : 0
  
      compatible_brands: M4A mp42isom
  
      comment         : Interview with Janus wireless and their 5 Wi-Fi card packet capturing Linux box. This is a special enhanced podcast (this file plays images and links in iTunes and on iPod color devices).
  
      tool            : ?
  
      title           : MAKE_2005-08-01
  
      artist          : MAKE Magazine
  
      composer        : MAKE Magazine - Phillip Torrone
  
      album           : Interview with Janus Wireless
  
      grouping        : MAKE Magazine enhanced podcast
  
      genre           : Podcast
  
      date            : 2005
  
      Chapter #0:0: start 0.000000, end 17.000000
  
      Metadata:
  
        title           : MAKE Magazine @ DEFCON with JANUS
  
      Chapter #0:1: start 17.000000, end 37.000000
  
      Metadata:
  
        title           : Janus
  
      Chapter #0:2: start 37.000000, end 83.000000
  
      Metadata:
  
        title           : Construction
  
      Chapter #0:3: start 83.000000, end 109.000000
  
      Metadata:
  
        title           : The MAKERs
  
      Chapter #0:4: start 109.000000, end 177.540000
  
      Metadata:
  
        title           : Display
  
      Stream #0:0(eng): Video: h264, none, q=2-31, 128 kb/s, SAR 206:275 DAR 0:0, 1 fps (default)
  
      Metadata:
  
        creation_time   : 2005-08-01 07:26:16
  
        handler_name    : ?Apple Alias Data Handler
  
        encoder         : Lavc57.5.100 libx264
  
      Stream #0:1(eng): Audio: aac, 0 channels, 128 kb/s (default)
  
      Metadata:
  
        creation_time   : 2005-08-01 07:26:16
  
        handler_name    : ?Apple Alias Data Handler
  
        encoder         : Lavc57.5.100 libfdk_aac
  
  Output #1, image2, to './thumb/1445675270.jpg':
  
    Metadata:
  
      major_brand     : M4A 
  
      minor_version   : 0
  
      compatible_brands: M4A mp42isom
  
      comment         : Interview with Janus wireless and their 5 Wi-Fi card packet capturing Linux box. This is a special enhanced podcast (this file plays images and links in iTunes and on iPod color devices).
  
      tool            : ?
  
      title           : MAKE_2005-08-01
  
      artist          : MAKE Magazine
  
      composer        : MAKE Magazine - Phillip Torrone
  
      album           : Interview with Janus Wireless
  
      grouping        : MAKE Magazine enhanced podcast
  
      genre           : Podcast
  
      date            : 2005
  
      Chapter #1:0: start 0.000000, end 17.000000
  
      Metadata:
  
        title           : MAKE Magazine @ DEFCON with JANUS
  
      Chapter #1:1: start 17.000000, end 37.000000
  
      Metadata:
  
        title           : Janus
  
      Chapter #1:2: start 37.000000, end 83.000000
  
      Metadata:
  
        title           : Construction
  
      Chapter #1:3: start 83.000000, end 109.000000
  
      Metadata:
  
        title           : The MAKERs
  
      Chapter #1:4: start 109.000000, end 177.540000
  
      Metadata:
  
        title           : Display
  
      Stream #1:0(eng): Video: mjpeg, none, q=2-31, 128 kb/s, SAR 206:275 DAR 0:0, 1 fps (default)
  
      Metadata:
  
        creation_time   : 2005-08-01 07:26:16
  
        handler_name    : ?Apple Alias Data Handler
  
        encoder         : Lavc57.5.100 mjpeg
  
  Stream mapping:
  
    Stream #0:2 -> #0:0 (tiff (native) -> h264 (libx264))
  
    Stream #0:0 -> #0:1 (aac (native) -> aac (libfdk_aac))
  
    Stream #0:2 -> #1:0 (tiff (native) -> mjpeg (native))
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

• 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.