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• uploading video to ftp while transcoding with Xuggler

  27 novembre 2013, par Holly

  I'm trying to transcode a video on a client PC (Win, Linux, IOS - x32 or x64 - all 6) and write the output directly to a ftp server using Xuggler. With pure ffmpeg it would look like this :

  ffmpeg -i "local.mp4" -ftp-write-seekable 0 -c:v libx264 -crf 25 -f flv ftp://user:pass@server.net:1234/uploaded.flv

  I'm assuming that it must be possible since ffmpeg can do it and Xuggler is supposed to be a wrapper for ffmpeg. I got it working using exec("ffmeg") but it needs to work on all 6 OS mentioned above.

  I tried to addapt this example : https://groups.google.com/forum/# !msg/xuggler-users/QeFTxqgc8Bg/0j1ntsl3tI0J by just using a ftp://user:pass@server.net:1234/uploaded.flvas the url but that does not work. Xuggler is unable to create a container based on such an url.

  I guess I should be able to write into an OutputStream and have ftp4j read from that stream and write to ftp. What would I need to consider for that ?

  Failing all else I could write into a temp file and upload that, but I really don't like that as a solution.

  1. Can someone please provide me with a code example of how to make Xuggler write to ftp directly ?

  2. As a side question. I'm still looking into how to best capture data for displaying the progress in the GUI. So far I found : IMediaListener onWritePacket(IWritePacketEvent event) which I would register to the writer. However I'm not sure how to get the details ffmped reports (current compression, output size so far). The only useful info I found so far is the TimeStamp. Any help on that would also be most welcome.

• uploading video to ftp while transcoding with Xuggler in JAVA on multiple platforms

  27 novembre 2013, par Holly

  I'm trying to transcode a video on a client PC (Win, Linux, Mac OS - x32 or x64 - all 6) and write the output directly to a ftp server using the JAVA lib Xuggler. With pure ffmpeg it would look like this :

  ffmpeg -i "local.mp4" -ftp-write-seekable 0 -c:v libx264 -crf 25 -f flv ftp://user:pass@server.net:1234/uploaded.flv

  I'm assuming that it must be possible since ffmpeg can do it and Xuggler is supposed to be a wrapper for ffmpeg. I got it working using exec("ffmeg") but it needs to work on all 6 OS mentioned above.

  I tried to addapt this example : https://groups.google.com/forum/# !msg/xuggler-users/QeFTxqgc8Bg/0j1ntsl3tI0J by just using a ftp://user:pass@server.net:1234/uploaded.flvas the url but that does not work. Xuggler is unable to create a container based on such an url.

  I guess I should be able to write into an OutputStream and have ftp4j read from that stream and write to ftp. What would I need to consider for that ?

  Failing all else I could write into a temp file and upload that, but I really don't like that as a solution.

  1. Can someone please provide me with a code example of how to make Xuggler write to ftp directly ?

  2. As a side question. I'm still looking into how to best capture data for displaying the progress in the GUI. So far I found : IMediaListener onWritePacket(IWritePacketEvent event) which I would register to the writer. However I'm not sure how to get the details ffmped reports (current compression, output size so far). The only useful info I found so far is the TimeStamp. Any help on that would also be most welcome.

• How to capture a log message coming out of node JS spawn ffmpeg command

  17 janvier 2014, par keenan

  I am trying to find the silent parts of an audio recording. This command does exactly what I want on my local machine.

  ffmpeg -i http://twf-audio.s3.amazonaws.com/uploads/DBC50460-9A5C-4174-9885-07337A582D58_1377839443598_tell.m4a -af silencedetect=n=-40dB:d=0.2 -f null -

  It sends a bunch of messages to the command line including these last three which are the lines of data that I need. (for reference : ffmpeg silencedetect docs)

  [silencedetect @ 0x7feea040cf20] silence_start : 0.0321995

  [silencedetect @ 0x7feea040cf20] silence_end : 0.975238 | silence_duration : 0.943039

  [silencedetect @ 0x7feea040cf20] silence_start : 1.47184

  I cannot figure out how to get that message out. Here is the nodejs code that is running. The only event that is triggered is the 'exit'. I thought that "pipe:1" sends output to stdout but that does not do anything.

  var ffmpeg = spawn('ffmpeg', ['-i',filename,'-af','silencedetect=n=-40dB:d=0.2', '-f', 'null','-y', 'pipe:1' ]);
  
  
  
  ffmpeg.on('message', function(data) {
  
      console.log('ffmpeg2 PARENT got message:', JSON.stringify(data));
  
  });
  
  
  
  ffmpeg.stdout.on('data', function(data) {
  
      console.log('ffmpeg stdout data = '+JSON.stringify(data) );
  
  });
  
  
  
  ffmpeg.on('exit', function (code, signal) {
  
    console.log('child process exited with code:' + code + ' signal:' + signal);
  
  });