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• 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)

• FFMPEG Android broken MP4 output video

  19 octobre 2015, par qstra

  I get error when try to play MP4 file with default android player, works fine on "MP4 player apps" and PC, tested on few phones, where is the problem ? how can I know why mp4 vid is broken ?

  I use command for convert jpg’s to mp4, they are numered fine and video is OK on PC but not on default player.

              String  cmd= "-y -r "+j+" -i /sdcard/TLphotos/%03d.jpg -preset ultrafast "+path+"/"+mp4name+".mp4";

• Input raw audio 512 floating-point values into FFMPEG ?

  29 septembre 2021, par NTPHCM

  In ActionScript 3, I use SoundMixer.computeSpectrum() to takes a snapshot of the current sound wave playing on the stage and places it into the specified ByteArray object.

  


  I want to write the ByteArray into FFMPEG (by std -i pipe:0), but the ByteArray object created is fixed to 512 floating-point values and FFMPEG seem doesn't support that value. The sound in the output is corrupted.

  


  Here's a part of my code in AS3 :

  


  stage.addEventListener(Event.ENTER_FRAME, update);
function update(e:Event):void{
    var soundBA:ByteArray = new ByteArray();
    SoundMixer.computeSpectrum(soundBA, false, 0);
    process.standardInput.writeBytes(soundBA);
}