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• 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 ?

• 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

• avcodec/vmnc : Check location before use

  21 mai 2017, par Michael Niedermayer

  avcodec/vmnc : Check location before use
  Fixes : runtime error : signed integer overflow : 65535 * 64256 cannot be represented in type 'int'
  
  Fixes : 1717/clusterfuzz-testcase-minimized-5491696676634624
  Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/vmnc.c