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• using iojs express and fluent-ffmpeg

  9 mai 2015, par edwardsmarkf

  i am trying to create a simple io.js that will read an opus file, convert it to mp3, and pass it to a webpage using express. here is what i have tried so far :

  var express = require('express');
  
  var ffmpeg = require('fluent-ffmpeg');
  
  var app = express();
  
  var fs = require('fs');
  
  
  
  app.get ('/ffmpegTest', function(req,res) {
  
        var stream = fs.createWriteStream('tester.mp3'); 
  
        ffmpeg('./tester.opus')
  
           .audioCodec('libmp3lame')
  
           .output(stream, {end:true})
  
              // tested to make sure it worked .saveToFile('./testerTEST.mp3')
  
            .on('error', function(err) {
  
                console.log('Processing error! ' + err);
  
            })  ;
  
   });
  
  
  
   var server = app.listen(3000, function() {
  
      var host = server.address().address;
  
      var port = server.address().port;
  
      console.log('Example app listening at http://%s:%s', host, port);
  
   });

  i also tried this from the website example (this was just a guess)

  var command = ffmpeg('./tester.opus')
  
      .audioCodec('libmp3lame')
  
      .on('error', function(err) {
  
           console.log('Processing error! ' + err);
  
      })  ;
  
   var ffstream = command.pipe();
  
   ffstream.on('data', function(chunk) {
  
      console.log('ffmpeg just wrote ' + chunk.length + ' bytes');
  
   });

  both of these examples give me "ffmpeg exited with code 1". when i try using "saveToFile" and write a test mp3 file it works fine.

  is there a simpler or better way to do this ?

• How to identify users in video file when streaming video ? [on hold]

  24 octobre 2017, par blackjak231

  I’m trying to find a solution to "secure" online video courses on a video streaming platform. The goals are the following :

  • Prevent easy download of video - OK
  • Be able to identify which connected user downloaded the video if it happens - NOK

  The server will be a Debian machine running PHP 7 and the "encryption" of the video will be done "on the stream" for each user.

  ---

  My question is for the second point. I’m unable to find a good solution for it. Here is what i thought of so far and the downsides :

  1. Add a watermark with the user’s name/email with "ffmpeg" on the whole video (in a corner)
     • Can be blurred and therefore useless
  2. Add an invisible digital watermark (inside the video file) with a tool (which i have not found yet)
     • Screen can be recorded and the invisible digital watermark lost.
  3. Add a watermark with the user’s name/email on 2 or 3 specific frames of the video while streaming using "ffmpeg"
     • Best solution from my point of view but no technical solution found so far.

  ---

  Do you have any recommendations on how to do this or a completely different approach to the problem ?

  I’m open to any third party video tool such as Vimeo or any other available.

  Thank you in advance for your help ! :)

• lavf/udp : fix dead code.

  3 juin 2016, par Nicolas George

  lavf/udp : fix dead code.
  Since d607861, service can not be NULL, only "0".
  
  An UDP address with neither local port nor address leaves both
  
  service and node to their default value, and POSIX specifies
  
  that they are not allowed to be both NULL ; "0" is equivalent
  
  to an unspecified port for all currently known protocols.
  Fix CID 1341570.
  

  • [DH] libavformat/udp.c