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• Using videoshow (npm module) with ffmpeg to conver audio+image into video

  31 mai 2017, par delesslin

  I’m trying to use the videoshow utility to combine a short audio clip with an image on my ubuntu system. I installed ffmpeg globally while in the root directory using :

  sudo apt-get install ffmpeg

  I then installed videoshow inside the project folder using :

  sudo npm install videoshow

  The project folder contains 3 files plus the node_modules folder : an image (wolf.jpg), an audio clip (wolf.mp3), and a js file (audio.js). I derived audio.js from an example script on the videoshow github page. Here is my script :

      var videoshow = require('videoshow')
  
  
  
  var images = [
  
    "wolf.jpg"
  
  ]
  
  
  
  var videoOptions = {
  
    fps: 25,
  
    loop: 5, // seconds
  
    transition: true,
  
    transitionDuration: 1, // seconds
  
    videoBitrate: 1024,
  
    videoCodec: 'libx264',
  
    size: '640x?',
  
    audioBitrate: '128k',
  
    audioChannels: 2,
  
    format: 'mp4',
  
    pixelFormat: 'yuv420p'
  
  }
  
  
  
  videoshow(images, videoOptions)
  
    .audio('wolf.mp3')
  
    .save('wolf.mp4')
  
    .on('start', function (command) {
  
      console.log('ffmpeg process started:', command)
  
    })
  
    .on('error', function (err, stdout, stderr) {
  
      console.error('Error:', err)
  
      console.error('ffmpeg stderr:', stderr)
  
    })
  
    .on('end', function (output) {
  
      console.error('Video created in:', output)
  
    })

  In the terminal, inside the project folder I then call :

  node audio.js

  The terminal is silent for a moment followed by :

      ffmpeg process started: ffmpeg -i /tmp/videoshow-db63732f-7376-4663-a7bc-c061091e579a -y -filter_complex concat=n=1:v=1:a=0 wolf.mp4
  
  ffmpeg process started: ffmpeg -i /tmp/videoshow-1f8851b4-c297-4070-a249-3624970dbb85 -i wolf.mp3 -y -b:a 128k -ac 2 -r 25 -b:v 1024k -vcodec libx264 -filter:v scale=w=640:h=trunc(ow/a/2)*2 -f mp4 -map 0:0 -map 1:0 -t 5 -af afade=t=in:ss=0:st=0:d=3 -af afade=t=out:st=2:d=3 -pix_fmt yuv420p wolf.mp4
  
  Error: [Error: ffmpeg exited with code 1: ]
  
  ffmpeg stderr: undefined

  I’m not sure why this isn’t working, but any/all assistance would be deeply appreciated...

  Hawu’h (thanks),
  Roo

• Using Node.js module fluent-ffmpeg to convert video but my files end up corrupt

  28 juin 2017, par El Guapo

  i am writing a node based media encoding tool and have found a few good node packages that will help me to do this, but the output files are either totally corrupt or it only encodes half the video.

  The main node package i am using is fluent-ffmpeg, and i am trying it with the following code :

  var ffmpeg = require('fluent-ffmpeg');
  
  
  
  var proc = new ffmpeg({ source: 'uploads/robocop-tlr1_h480p.mov', nolog: false})
  
    .withVideoCodec('libx264')
  
    .withVideoBitrate(800)
  
    .withAudioCodec('libvo_aacenc')
  
    .withAudioBitrate('128k')
  
    .withAudioChannels(2)
  
    .toFormat('mp4')
  
    .saveToFile('output/robocop.mp4',
  
      function(retcode, error){
  
          console.log('file has been converted succesfully');
  
  });

  There is not a problem with the source video as i encoded it just fine using FFmpeg normally with the following comand line string (i run it from a batch file) :

  "c:\ffmpeg\bin\ffmpeg.exe" -i %1 -acodec libvo_aacenc -b:a 128k -ac 2 -vcodec libx264 -b:v 800k -f mp4 "../output/robocop2.mp4"

  Any ideas what i am doing wrong here ?

• How can select only two audio streams in a video and feed it to the ebur128 filter wiithin ffmpeg ?

  23 janvier 2020, par Edwin

  I want to use FFmpeg to analyze the loudness of an MXF video file.
  I have an MXF file with 8 mono audio streams. I only want to feed the first two streams through the ebur128 filter. But I can’t find a way to do that. The FFmpeg documentation is not clear to me, as I am fairly new to FFmpeg.

  I tried several things :

  ffmpeg -i source.mxf -nostats -filter_complex ebur128=dualmono=true:panlaw=-3.01dB -f null -

  I am sure it’s just that I don’t have the filtering syntax right. But hey... I’m a newbie...

  ---

  ffmpeg -i myVideo.mxf -nostats -filter_complex [0:a:0][0:a:1]amerge; ebur128=dualmono=true:panlaw=-3.01 -f null -

  And this is the resulting console output :

  ffmpeg version 2.8.6 Copyright (c) 2000-2016 the FFmpeg developers
  
  built with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
  
  configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-        pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --enable-libvidstab --enable-libx265 --disable-doc --arch=x86_64 --enable-runtime-cpudetect
  
  libavutil      54. 31.100 / 54. 31.100
  
  libavcodec     56. 60.100 / 56. 60.100
  
  libavformat    56. 40.101 / 56. 40.101
  
  libavdevice    56.  4.100 / 56.  4.100
  
  libavfilter     5. 40.101 /  5. 40.101
  
  libswscale      3.  1.101 /  3.  1.101
  
  libswresample   1.  2.101 /  1.  2.101
  
  libpostproc    53.  3.100 / 53.  3.100
  
  
  
  Guessed Channel Layout for  Input Stream #0.1 : mono
  
  Guessed Channel Layout for  Input Stream #0.2 : mono
  
  Guessed Channel Layout for  Input Stream #0.3 : mono
  
  Guessed Channel Layout for  Input Stream #0.4 : mono
  
  Guessed Channel Layout for  Input Stream #0.5 : mono
  
  Guessed Channel Layout for  Input Stream #0.6 : mono
  
  Guessed Channel Layout for  Input Stream #0.7 : mono
  
  Guessed Channel Layout for  Input Stream #0.8 : mono
  
  Input #0, mxf, from 'myVideo.mxf':
  
  Metadata:
  
  uid             : a727a381-1f5a-11e7-bdc8-18af61b92a5a
  
  generation_uid  : a727a382-1f5a-11e7-9a04-18af61b92a5a
  
  company_name    : Adobe Systems Incorporated
  
  product_name    : Adobe Media Encoder
  
  product_version : 11.0.2
  
  application_platform: Mac OS X
  
  product_uid     : 0c3919fe-46e8-11e5-a151-feff819cdc9f
  
  modification_date: 2017-04-12 08:33:07
  
  material_package_umid: 0x060A2B340101010501010D1113000000A0C9D501557805A5DF7018AF61B92A5A
  
  timecode        : 00:00:00:00
  
  Duration: 00:05:24.08, start: 0.000000, bitrate: 59986 kb/s
  
  Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, unknown/bt709/bt709), 1920x1080 [SAR 1:1 DAR 16:9], 50000 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
  
  Metadata:
  
    file_package_umid: 0x060A2B340101010501010D12133A5D15A0C9D501557805A5B09318AF61B92A5A
  
    file_package_name: Source Package
  
  Stream #0:1: Audio: pcm_s24le, 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s
  
  Metadata:
  
    file_package_umid: 0x060A2B340101010501010D12133A5D15A0C9D501557805A5B09318AF61B92A5A
  
    file_package_name: Source Package
  
  Stream #0:2: Audio: pcm_s24le, 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s
  
  Metadata:
  
    file_package_umid: 0x060A2B340101010501010D12133A5D15A0C9D501557805A5B09318AF61B92A5A
  
    file_package_name: Source Package
  
  Stream #0:3: Audio: pcm_s24le, 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s
  
  Metadata:
  
    file_package_umid: 0x060A2B340101010501010D12133A5D15A0C9D501557805A5B09318AF61B92A5A
  
    file_package_name: Source Package
  
  Stream #0:4: Audio: pcm_s24le, 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s
  
  Metadata:
  
    file_package_umid: 0x060A2B340101010501010D12133A5D15A0C9D501557805A5B09318AF61B92A5A
  
    file_package_name: Source Package
  
  Stream #0:5: Audio: pcm_s24le, 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s
  
  Metadata:
  
    file_package_umid: 0x060A2B340101010501010D12133A5D15A0C9D501557805A5B09318AF61B92A5A
  
    file_package_name: Source Package
  
  Stream #0:6: Audio: pcm_s24le, 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s
  
  Metadata:
  
    file_package_umid: 0x060A2B340101010501010D12133A5D15A0C9D501557805A5B09318AF61B92A5A
  
    file_package_name: Source Package
  
  Stream #0:7: Audio: pcm_s24le, 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s
  
  Metadata:
  
    file_package_umid: 0x060A2B340101010501010D12133A5D15A0C9D501557805A5B09318AF61B92A5A
  
    file_package_name: Source Package
  
  Stream #0:8: Audio: pcm_s24le, 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s
  
  Metadata:
  
    file_package_umid: 0x060A2B340101010501010D12133A5D15A0C9D501557805A5B09318AF61B92A5A
  
    file_package_name: Source Package
  
  Filter amerge has a unconnected output
  
  
  
  bash: -f: command not found

  I changed the name of the video to myVideo.mxf.