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• ffmpeg spawned inside NodeJS doesn't output to a url

  31 août 2020, par New Dev

  I'm trying to run ffmpeg on Google Cloud (cloud functions) and I'm trying to have it output the files to a URL (of a Google Storage).

  


  I'm spawning ffmpeg in NodeJS like so :

  


  const { spawn } = require('child_process');

spawn('ffmpeg', [
        '-i', 'input.mp4',
        // ... other arguments
        '-f', 'mp4',
        '-movflags', 'frag_keyframe+empty_moov' // needed for a URL output
        '-headers', `'Authorization: Bearer ${token}'`
        'https://storage.googleapis.com/upload/storage/v1/b/...'])


  


  The problem is the file never gets uploaded, even though ffmpeg runs and exits with code 0.

  


  The weird part is that if I run the exact same command directly from the terminal, it uploads the file.

  


  ffmpeg -i input.mp4 -f mp4 -movflags frag_keyframe+empty_moov -headers 'Authorization: Bearer XXX' 'https://storage.googleapis.com/upload/storage/v1/b/...'


  


  This, I think, eliminates the possibility of any authentication issues or anything on the server-side.

  


  I don't see any difference in the in the output (stderr).

  


  Any idea why the Node-version doesn't upload the output and doesn't report any errors ?

  


• streams not writing complete chunk in nodejs

  20 juillet 2022, par Israel Edoghama

  AIM

  


  I am working on a small project that chunks an audio file and then uploads the chunks to a cloud server.

  


  PROCESS

  


  

  • upload the audio file to the server

  


  • chunk the audio file with ffmpeg using a child process then write the chunk to a folder on the server

  


  • then upload the chunked files to a cloud server (working with aws s3)

  


  


  This works well with audio files lesser than 15Mb but on larger files the chunk doesn't get to the end.
For example, in trying to upload a 40+Mb file the chunk stops at number 153, but when I use my commandline to run the ffmpeg, I get 328 chunked files. What could be wrong

  


  Here is my code :

  


  const muxer = child_process.spawn('ffmpeg', transformArgs, {
           cwd: `${cwd}/transforms`,
        });

        console.log('creating stream (read)...');
                    
        fs.createReadStream(
           `${cwd}/transforms/stream${path.extname(
              fileSrc.filename,
           )}`,
        )
           .pipe(muxer.stdin)
           .on('error', (e) => {
              console.log(e);
           }).on('close', async () => {
              console.log('ended');
              muxer.stdin.end();
              muxer.kill();})


  


• Flac-in-mp4 draft v0.0.1.

  4 octobre 2016, par Ralph Giles

  Flac-in-mp4 draft v0.0.1.
  Draft updates in response to feedback from Timothy B. Terriberry
  
  and Jean-Yves Avenard.
  Signed-off-by : Erik de Castro Lopo <erikd@mega-nerd.com>
  

  • [DH] doc/isoflac.txt