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• audio file conversion using ffmpeg

  15 juillet 2014, par user3789242

  I’m building a voice recording project.so far I have succeeded in recording the voice as .wav audio file, and I’m using the ffmpeg for the user to be able to convert the audio file into a selected format (mp3, pcm, wma). What I want to do is to allow the user to select the format before recording the voice so that when stop recording the file will be saved in the selected format maybe by using ffmpeg conversion.

  I have been searching the net for weeks for any demo using JavaScript and html5 but can’t find any. What I have tried so far is to save the audio file in a folder using Ajax/php and I’m trying to call that file in order to convert it but this method is very complicated and is not working. Any suggestions please. If you can also help me with a demo it would be most appreciated. This is my code so far :

  function handleWAV(blob) {
  
  
  
  if (currentEditedSoundIndex !== -1) {
  
  $('#inFile2 tr:nth-child(' + (currentEditedSoundIndex + 1) + ')').remove();
  
  
  
  }
  
  
  
  var url = URL.createObjectURL(blob);
  
  
  
  var li = document.createElement('li');
  
  var au = document.createElement('audio');
  
  var hf = document.createElement('a');
  
  
  
  au.controls = true;
  
  au.src = url;
  
  hf.href = url;
  
  hf.download = 'audio_recording_' + new Date().getTime() + '.wav';
  
  hf.innerHTML = hf.download;
  
  li.appendChild(au);
  
  li.appendChild(hf);
  
  inFile2.appendChild(li);
  
  
  
  
  
  fileName=hf.download;
  
  
  
  var reader = new FileReader();
  
  reader.onload = function(event){
  
      var fd = new FormData();
  
      var Name = encodeURIComponent('audio_recording_' + new Date().getTime() + '.wav');
  
      console.log("name = " + Name);
  
      fd.append('fname', Name);
  
      fd.append('data', event.target.result);
  
      $.ajax({
  
          type: 'POST',
  
          url: 'upload.php',
  
          data: fd,
  
          processData: false,
  
          contentType: false,
  
          success: function(data){
  
              //console.log(data);
  
          }
  
      });
  
  };      
  
  reader.readAsDataURL(blob);
  
  
  
  
  
  
  
   var fileBuffer;
  
  
  
  
  
  
  
   // create ffmpeg worker
  
   function getFFMPEGWorker() {
  
  
  
  
  
       var ffmpegWorker = new Worker('worker.js');
  
  
  
       ffmpegWorker.addEventListener('message', function(event) {
  
           var message = event.data;
  
           console.log(message.type);
  
           if (message.type === "ready" && window.File && window.FileList && window.FileReader) {
  
               // script loaded, hide loader
  
  
  
           } else if (message.type == "stdout") {
  
               console.log(message.data);
  
           } else if (message.type == "stderr") {
  
               console.log(message.data);
  
           } else if (message.type == "done") {
  
               var code = message.data.code;
  
               console.log(code);
  
               console.log(message.data);
  
               var outFileNames = Object.keys(message.data.outputFiles);
  
  
  
               console.log(outFileNames);
  
               if (code == 0 && outFileNames.length) {
  
                   var outFileName = outFileNames[0];
  
                   console.log(outFileName);
  
                   var outFileBuffer = message.data.outputFiles[outFileName];
  
                   console.log(outFileBuffer);
  
                   var src = url;
  
                   console.log(url);
  
                   $("#downloadLink2").attr('href', src);
  
                   $("#download2").show();
  
               } else {
  
                   $("#error").show();
  
               }
  
  
  
           }
  
       }, false);
  
       return ffmpegWorker;
  
   }
  
  
  
   // create ffmpeg worker
  
   var ffmpegWorker = getFFMPEGWorker();
  
   var ffmpegRunning = false;
  
   if (ffmpegRunning) {
  
       ffmpegWorker.terminate();
  
       ffmpegWorker = getFFMPEGWorker();
  
   }
  
   ffmpegRunning = true;
  
  
  
  
  
  
  
   // hide download div
  
   $("#download2").hide();
  
  
  
   // change download file name
  
   var fileNameExt = fileName.substr(fileName.lastIndexOf('.') + 1);
  
  
  
   var outFileName = fileName.substr(0, fileName.lastIndexOf('.')) + "." + getOutFormat();
  
  
  
   $("#downloadLink2").attr("download2", outFileName);
  
   $("#downloadLink2").text(outFileName);
  
  
  
   var arguments = [];
  
   arguments.push("-i");
  
   arguments.push(fileName);
  
  
  
   arguments.push("-b:a");
  
   arguments.push(getBitrate());
  
  
  
   switch (getOutFormat()) {
  
       case "mp3":
  
           arguments.push("-acodec");
  
           arguments.push("libmp3lame");
  
           arguments.push("out.mp3");
  
           break;
  
  
  
       case "wma":
  
           arguments.push("-acodec");
  
           arguments.push("wmav1");
  
           arguments.push("out.asf");
  
           break;
  
  
  
       case "pcm":
  
           arguments.push("-f");
  
           arguments.push("s16le");
  
           arguments.push("-acodec");
  
           arguments.push("pcm_s16le");
  
           arguments.push("out.pcm");
  
   }
  
  
  
   ffmpegWorker.postMessage({
  
       type: "command",
  
       arguments: arguments,
  
       files: [
  
           {
  
               "name": fileName,
  
               "buffer": fileBuffer
  
           }
  
       ]
  
   });
  
  
  
  
  
   function getOutFormat() {
  
   return $('input[name=format]:checked').val();
  
   }
  
  
  
   function getBitrate() {
  
   return $('input[name=bitrate]:checked').val();
  
   }
  
  
  
   function readInputFile(file) {
  
  
  
  
  
   // load file content
  
   var reader = new FileReader();
  
   reader.onload = function(e) {
  
  
  
       fileName = file.name;
  
       console.log(fileName);
  
       fileBuffer = e.target.result;
  
   }
  
   reader.readAsArrayBuffer(file);
  
  
  
   }
  
  
  
  
  
  
  
  function handleFileSelect(event) {
  
   var files = event.target.files; // FileList object
  
  
  
   console.log(files);
  
   // files is a FileList of File objects. display first file name
  
   file = files[0];
  
  
  
   console.log(file);
  
   if (file) {
  
  
  
       readInputFile(file);
  
       console.log(file);
  
  
  
   }
  
   }
  
  
  
   // setup input file listeners
  
  el=document.getElementById('inFile2');
  
  
  
  el.addEventListener('change',handleFileSelect, true);
  
  
  
  }

  This code is for the download link where the user will be able to download the audio file also the conversion function happening in it.

  As I said earlier the audio files are uploaded in a folder upload using Ajax.

• Révision 100309 : La constante _DEV_PLUGINS a été remplacée dans le core par _DEV_VERSION_SPIP_COM...

  1er novembre 2016, par marcimat@rezo.net

  S’adapter dans SVP !

• FFmpeg Executing command error

  7 avril 2016, par Sanket990

  When I conversion mp4 to mp3 using ffmpeg command
  FFmpeg command Execution error- Working directory null IOEXception
  Executing below code.

  File path=Environment.getExternalStorageDirectory();    
  
  try {
  
              String ffmpegCommand="ffmpeg -i "+path.getAbsolutePath()+"/test/1.mp4 -f avi -acodec mp3 "+path.getAbsolutePath()+"/Songss.avi";
  
                Process ffmpegProcess = new ProcessBuilder(ffmpegCommand).redirectErrorStream(true).start();
  
  
  
                String line;
  
                BufferedReader reader = new BufferedReader(new InputStreamReader(ffmpegProcess.getInputStream()));
  
                Log.d("tag", "*******Starting FFMPEG");
  
  
  
                while((line = reader.readLine())!=null){
  
  
  
                    Log.d("tag", "***"+line+"***"); 
  
                }
  
                Log.d("tag","****ending FFMPEG****");
  
  
  
          } catch (IOException e) {
  
              e.printStackTrace(); }

  LogCat

  java.io.IOException: Error running exec(). Command: [/data/data/com.example.ffmpegcommandexecute/ffmpeg -i /mnt/sdcard/Songs.mp4 -vn -s 00:00:10 -acodec libmp3lame output.mp3]
  
   Working Directory: null Environment: [ANDROID_SOCKET_zygote=10, ANDROID_BOOTLOGO=1, EXTERNAL_STORAGE=/mnt/sdcard, ANDROID_ASSETS=/system/app, PATH=/sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin, ASEC_MOUNTPOINT=/mnt/asec, LOOP_MOUNTPOINT=/mnt/obb, BOOTCLASSPATH=/system/framework/core.jar:/system/framework/core-junit.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/android.policy.jar:/system/framework/services.jar:/system/framework/apache-xml.jar:/system/framework/filterfw.jar, EXTERNAL_STORAGE_SD=/mnt/ext_card, EXTERNAL_STORAGE_ALL=/mnt/sdcard:/mnt/ext_card, WTLE_VERSION=3.2.0.patch6.1, ANDROID_DATA=/data, LD_LIBRARY_PATH=/vendor/lib:/system/lib, ANDROID_ROOT=/system, ANDROID_PROPERTY_WORKSPACE=9,65536]
  
      at java.lang.ProcessManager.exec(ProcessManager.java:211)
  
      at java.lang.ProcessBuilder.start(ProcessBuilder.java:195)
  
      at com.example.ffmpegcommandexecute.MJPEGFFMPEGTest$ProcessVideo.doInBackground(MJPEGFFMPEGTest.java:301)
  
      at com.example.ffmpegcommandexecute.MJPEGFFMPEGTest$ProcessVideo.doInBackground(MJPEGFFMPEGTest.java:1)
  
      at android.os.AsyncTask$2.call(AsyncTask.java:264)
  
      at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
  
      at java.util.concurrent.FutureTask.run(FutureTask.java:137)
  
      at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
  
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
  
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
  
      at java.lang.Thread.run(Thread.java:856)
  
   Caused by: java.io.IOException: No such file or directory
  
      at java.lang.ProcessManager.exec(Native Method)
  
      at java.lang.ProcessManager.exec(ProcessManager.java:209)