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• audioCodec doesn't recognize 'aac' or 'libfdk-aac'

  24 août 2015, par Mayur Tanna

  I want to convert mp3 to aac using ffmpeg and stream it to s3 in my node application. My code is as below. Now when I try to use audioCodec as ’aac’ or ’libfdk-aac’. It throws the error. Note that ffmpeg is compiled with ’libfdk-aac’ and working fine from command line.

  Any inputs/fixes ?

  var proc = new ffmpeg({source:uploadedFiles[0].fd})
  
  .audioCodec('aac') // .audioCodec('libfdk-aac')
  
  .audioChannels(1);
  
  
  
  proc.on('error', function(err) { 
  
  console.log('An error occurred: ' + err.message);
  
  })
  
  .on('end', function() {
  
      console.log('audio uploaded successfully!');
  
  }).pipe(upload(opts));

  Thanks.

• Redirect shell output for ruby script

  2 juin 2015, par rs41

  I have simple ruby script :

   #! /usr/bin/env ruby
  
   require 'fileutils'
  
  
  
   FileUtils.rm "output.mkv" if File.exists?("outp    ut.mkv")
  
   pid = Process.spawn("ffmpeg -i wrong_file.mp4 -c:v libx264 -preset veryslow -qp 0 output.mkv", STDOUT => "output.txt", STDERR => "error.txt")
  
  
  
   puts "pid : #{pid}"
  
   Process.wait(pid)

  But, STDOUT and STDERR outputs into error.txt, why ?

  It looks, that ffmpeg have another exit codes ?(in usual case 0 for stdout, and 1 for stdin)

  Note : I don’t want to use native shell redirect like ’> output.txt 2> error.txt’ because i want to get pid of ffmpeg process, not shell process and kill it in future.

• exec() does not return to PHP process

  24 avril 2013, par Ivo Renkema

  I am running FFMPEG from PHP with the EXEC command. I am working on a XAMP stack.

  $command = 'ffmpeg -y -i input output 2>logfile';
  
  exec ($command);
  
  // after FFMPEG handling...

  As you can see, I am redirecting FFMPEG's output to a log file.

  This works fine from smaller video files (up to approximately 10 MB).

  My problem is that for larger video files, any PHP commands after the exec() will not get executed. Note however, that the FFMPEG process works just fine. The log file shows that FFMPEG terminates OK, and the resulting output file is also good.

  My max_execution_time is set to 10800, which should be plenty (and then some). Anyway, as I understand from max_time_limit :

  The set_time_limit() function and the configuration directive
  max_execution_time only affect the execution time of the script
  itself. Any time spent on activity that happens outside the execution
  of the script such as system calls using system() ... is not included
  when determining the maximum time that the script has been running.

  Update : error logs state : Premature end of script

  What is going on ?