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• Post processing in ffmpeg to move 'moov atom' in MP4 files (qt-faststart)

  9 janvier 2023, par siliconpi

  Is it possible to run ffmpeg from the command line which will either place the 'moov atom' metadata in the beginning of the MP4 file or run the qt-faststart as a post processing operation in ffmpeg so the generated file is stream-able through the internet ?

  



  I can of course run it as a separate command, but would prefer it to be something

  



  

  • as an option within ffmpeg, or

  


  • as part of a post conversion, command line option when converting the video files via ffmpeg

  


  



  ---

  



  Edit 1

  



  http://ffmpeg.org/ffmpeg.html#mov

  



  


  MOV / MP4 muxer

  
 


  The muxer options are :

  
 


  ‘-moov_size bytes’

  



  Reserves space for the moov atom at the beginning of the file instead of 
placing the moov atom at the end. If the space reserved is insufficient, 
muxing will fail.


  


  


• FFMPEG Error while processing the decoded data for stream #0:1

  2 décembre 2020, par Michael Joseph Aubry

  When using the FFMPEG command in my Lambda function I am getting this issue (version 4.2.1). When using it on my local machine it works fine (4.3.1).

  


  Lambda Version Info

  


  {
  data: 'ffmpeg version 4.2.1-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers\n' +
    'built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516\n' +
    'configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg\n' +
    'libavutil      56. 31.100 / 56. 31.100\n' +
    'libavcodec     58. 54.100 / 58. 54.100\n' +
    'libavformat    58. 29.100 / 58. 29.100\n' +
    'libavdevice    58.  8.100 / 58.  8.100\n' +
    'libavfilter     7. 57.100 /  7. 57.100\n' +
    'libswscale      5.  5.100 /  5.  5.100\n' +
    'libswresample   3.  5.100 /  3.  5.100\n' +
    'libpostproc    55.  5.100 / 55.  5.100\n'
}


  


  Macbook Pro Version Info

  


  {
  data: 'ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
built with Apple clang version 11.0.0 (clang-1100.0.33.17)
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.1 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable- 
  libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable- 
  libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable- 
  librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable- 
  indev=jack
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100'
}


  


  My goal with this command is to generate a thumbnail sprite sheet.

  


  ffmpeg \
  -threads 8 \
  -ignore_editlist 1 \
  -i URL \
  -f image2 \
  -vf "select='not(mod(n,25))',setpts='N/(25*TB)',scale=180:180,tile=5x25" \  
  -pix_fmt yuvj420p \
  -an \
  -qscale:v 28 \
  -vsync 0 \
  -preset veryfast \
  pipe:1


  


  The same error occurs when I have a .jpg output on disk i.e /tmp/test.jpg

  


  This is the exact log from cloudwatch

  


  {&#xA;    "errorType": "Error",&#xA;    "errorMessage": "ffmpeg exited with code 1: Error reinitializing filters!\nFailed to inject frame into filter network: Invalid argument\nError while processing the decoded data for stream #0:1\nConversion failed!\n",&#xA;    "stack": [&#xA;        "Error: ffmpeg exited with code 1: Error reinitializing filters!",&#xA;        "Failed to inject frame into filter network: Invalid argument",&#xA;        "Error while processing the decoded data for stream #0:1",&#xA;        "Conversion failed!",&#xA;        "",&#xA;        "    at ChildProcess.<anonymous> (/var/task/node_modules/fluent-ffmpeg/lib/processor.js:182:22)",&#xA;        "    at ChildProcess.emit (events.js:314:20)",&#xA;        "    at ChildProcess.EventEmitter.emit (domain.js:483:12)",&#xA;        "    at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12)"&#xA;    ]&#xA;}&#xA;</anonymous>

  


  Here is the raw command using fluent-ffmpeg inside node.js

  


      const passThrough = new stream.PassThrough();
    const fps = 25;
    const sWidth = 720 / 4;
    const sHeight = 1920 / 4;

    ffmpeg(s3Url)
      .setFfmpegPath("/opt/ffmpeg")
      .inputOptions([`-threads`, "8", "-ignore_editlist", "1"])
      .outputOptions([
        "-f",
        "image2",
        "-vf",
        `"select='not(mod(n,${fps}))',setpts='N/(${fps}*TB)',scale=${sWidth}:${sHeight},tile=5x25"`,
        "-pix_fmt",
        "yuvj420p",
        "-an",
        "-qscale:v",
        "28",
        "-vsync",
        "0",
        "-preset",
        "veryfast"
      ])
      .output(passThrough)
      .on("start", (cmdline) => console.log(cmdline))
      .on("progress", (progress) => {
        console.log(progress);
      })
      .on("error", (err) => {
        console.log(err);
        reject(err);
      })
      .run();


  


  Additional log from cloudwatch

  


  2020-12-02T18:42:55.023Z    2f334838-f748-4f2e-a639-15df0686ab4b    INFO    Error: ffmpeg exited with code 1: Error reinitializing filters!Failed to inject frame into filter network: Invalid argumentError while processing the decoded data for stream #0:1Conversion failed!    at ChildProcess.<anonymous> (/var/task/node_modules/fluent-ffmpeg/lib/processor.js:182:22)    at ChildProcess.emit (events.js:314:20)    at ChildProcess.EventEmitter.emit (domain.js:483:12)    at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12)&#xA;</anonymous>

  


• Problem with processing FFMPEG video , the output video is totally black in first 3 seconds

  13 janvier 2021, par Trần Minh Tuấn

  I want to make a slideshow by using concat demuxer like this link :
https://trac.ffmpeg.org/wiki/Slideshow

  


  Here is the textfile preinputFiles.txt :

  


  file 'path a'
duration 2
file 'path b'
duration 2
file 'path c'
duration 2
file 'path c'


  


  and my command array is :

  


  String[] cmd = new String[]{
            "-f","concat","-i",
            textFile,
            "-vsync", "vfr", "-pix_fmt", "yuv420p",
            dest.getAbsolutePath()};


  


  the video has 3 seconds that it is totally black and run from 3s to 9s even the gallery shows that it is a 6 seconds long video .

  


  Thanks for the help !