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• ffmpeg - produces corrupted file

  1er mai 2015, par pomegranate

  I have a mp4 file that I need to convert to avi to run a matlab script on. This script strips the file of any audio, so then I have to merge it back with the audio and then reconvert the avi to mp4. I’m doing this in a number of steps, and am uncertain at which point I’m screwing the commands up... basically, the final mp4 file I create it corrupted and cannot be played in quicktime (though it does work in VLC).

  Here are the steps I am taking :

  1) ffmpeg -i original.mp4 -acodec copy -vcodec copy original.avi
  
     This converts mp4 to avi.
  
  2) ffmpeg -i original.mp4 -acodec copy original.aac
  
     This gets the audio from the mp4.
  
  3) Run matlab script, which produces new-no-sound.avi
  
  4) ffmpeg -i new-no-sound.avi -i original.aac -c:v copy -c:a aac -strict experimental new-with-sound.avi
  
     This merges the old audio with the new avi file
  
  5) ffmpeg -i new-no-sound.avi -c:v libx264 -crf 19 -preset slow -c:a libfaac -b:a 192k -ac 2 final-version.mp4
  
     This converts the new merged file to mp4.

  Here’s the ffmpeg -i from the original.mp4 :

    Metadata:
  
  major_brand     : isom
  
  minor_version   : 512
  
  compatible_brands: isomiso2mp41
  
  encoder         : Lavf54.29.104
  
  Duration: 00:00:01.77, start: 0.000000, bitrate: 9920 kb/s
  
  Stream #0:0(eng): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 9978 kb/s, 59.94 fps, 59.94 tbr, 2997 tbn, 2997 tbc (default)
  
  Metadata:
  
    handler_name    : VideoHandler
  
  Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 52 kb/s (default)
  
  Metadata:
  
    handler_name    : SoundHandler

  And here is it for new-no-sound.avi :

  Input #0, avi, from 'new-no-sound.avi':
  
  Duration: 00:00:02.12, start: 0.000000, bitrate: 1325789 kb/s
  
  Stream #0:0: Video: rawvideo, bgr24, 1280x720, 1336298 kb/s, 59.94 fps, 59.94 tbr, 59.94 tbn, 59.94 tbc

  Finally, here it is for final-version.mp4

  Metadata:
  
  major_brand     : isom
  
  minor_version   : 512
  
  compatible_brands: isomiso2avc1mp41
  
  encoder         : Lavf55.48.100
  
  Duration: 00:00:02.21, start: 0.023220, bitrate: 2117 kb/s
  
  Stream #0:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuv444p, 1280x720, 2108 kb/s, 59.94 fps, 59.94 tbr, 11988 tbn, 119.88 tbc (default)
  
  Metadata:
  
    handler_name    : VideoHandler
  
  Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 43 kb/s (default)
  
  Metadata:
  
    handler_name    : SoundHandler

  Any advice for where I might be going wrong ?

• Révision 20115 : fusion des inc/distant de la branche 2.1 et de la branche 3 ; ca permet de reven...

  22 janvier 2013, par Fil Up

  au passage, ca reporte aussi [19231] (documents proteges, faussement distants) sur le trunk a noter : les modifications d’espaces et de tabulations, bien que effectivement ameliorant le source, produisent de nombreux diffs ’muets’ qu’il a fallu verifier un par un... au final une perte de temps (...)

• Ffmpeg ./configure not found

  8 juin 2016, par Justin Tullock

  I’m trying to install ffmpeg with libvpx & libx264 on my vps. Centos07. I’ve followed these instructions https://trac.ffmpeg.org/wiki/CompilationGuide/Centos to the T.

  Now when I try to run

  cd ~/ffmpeg; ./configure --enable-libvpx --enable-gpl --enable-libx264

  it returns

  -bash: ./configure: No such file or directory

  When I try ffmpeg -v

  ffmpeg: error while loading shared libraries: libx264.so.148: cannot open shared object file: No such file or directory

  and ldd $(which ffmpeg) returns

  root@host [~/ffmpeg_sources]# ldd $(which ffmpeg)
  
  linux-vdso.so.1 =>  (0x00007fff4fb86000)
  
  libxcb.so.1 => /lib64/libxcb.so.1 (0x00007f4972e27000)
  
  libxcb-shm.so.0 => /lib64/libxcb-shm.so.0 (0x00007f4972c23000)
  
  libxcb-xfixes.so.0 => /lib64/libxcb-xfixes.so.0 (0x00007f4972a1a000)
  
  libxcb-shape.so.0 => /lib64/libxcb-shape.so.0 (0x00007f4972816000)
  
  libx264.so.148 => not found
  
  libm.so.6 => /lib64/libm.so.6 (0x00007f4972513000)
  
  liblzma.so.5 => /lib64/liblzma.so.5 (0x00007f49722ee000)
  
  libbz2.so.1 => /lib64/libbz2.so.1 (0x00007f49720de000)
  
  libz.so.1 => /lib64/libz.so.1 (0x00007f4971ec7000)
  
  libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f4971cab000)
  
  libc.so.6 => /lib64/libc.so.6 (0x00007f49718e9000)
  
  libXau.so.6 => /lib64/libXau.so.6 (0x00007f49716e4000)
  
  /lib64/ld-linux-x86-64.so.2 (0x00007f4973056000)

  I’ve followed all the instructions exactly - is there something I’m missing ?