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• Background process that is run on file is still running after the file is deleted

  19 octobre 2015, par Marko Djokic

  So i have a process in Android that is run like this :

     process = Runtime.getRuntime().exec(commandString);
  
     Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
  
          public void run() {
  
               Log.d("ShutDownHook Called");
  
               process.destroy();
  
          }
  
     }));

  Where the command string contains a file path and some other arguments.
  That process is a CPU heavy process and can take last as long as a few hours (Movie transcoding). The file is an ffmpeg static file. The problem is in some cases the process stays in the background even though i killed the app. That situation is on one of my phones when i kill the app with the task manager. That being said, the onDestroy() method is not called, nor is the onTerminate() from the application class, nor the shutdown hook from above.

  Also i have created a background service with a notification, so when exit the app the service should stay in the background. Even with this kind of control, when i kill the application with the task manager, the service is restarted and i lose all the references to my ffmpeg class, Async task, process etc, and i cannot stop the process because i have null pointers.
  Anyway i can ensure that the service will not be tampered with the app kill, so i can kill the process with the notification bar from my service ?

  ServiceConnection mConnection = new ServiceConnection() {
  
  
  
      public void onServiceDisconnected(ComponentName name) {
  
          Log.d("HelperActivity", "onServiceDisconnected");
  
          mIsBound = false;
  
          mServer = null;
  
      }
  
  
  
      public void onServiceConnected(ComponentName name, IBinder service) {
  
          Log.d("HelperActivity", "onServiceConnected");
  
          mIsBound = true;
  
          NotificationService.LocalBinder mLocalBinder = (NotificationService.LocalBinder)service;
  
          mServer = mLocalBinder.getServerInstance();
  
          //mServer.test();
  
      }
  
  };
  
  //This is the onCreate of the application class
  
  @Override
  
  public void onCreate() {
  
      super.onCreate();
  
      Intent intent = new Intent(this,
  
              NotificationService.class);
  
  
  
      startService(intent);
  
      bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
  
      Log.d("onCreate", "Called");
  
      singleton = this;
  
  
  
  }

  I have been using http://hiteshsondhi88.github.io/ffmpeg-android-java/ for the ffmpeg support. Of course added new features but the basic concept of running a ffmpeg command is the same.

  One other strange thing is, when i start the app i delete the previous file, and still the process is running in the background, cause my transcoding performances are halved. The file is copied from assets to the internal storage every time the app is started.

    File ffmpegFile = new File(FileUtils.getFFmpeg(context));
  
    if (ffmpegFile.exists()) {
  
          Log.d("File exists!");
  
          ffmpegFile.delete();
  
    }

  The file is deleted i checked, but my CPU is still used a lot.
  Sorry for any mistakes during the post, it is my first one.

• FFMPEG convert file output without original file's extension [closed]

  26 juin 2020, par sknagu05

  @echo off

rem echo %~F0
rem echo %~F1

Set filename=%~F0
For %%A in ("%filename%") do (
    Set Folder=%%~dpA
    Set Name=%%~nxA
)

Set filename1=%~F1
For %%B in ("%filename1%") do (
    Set Folder1=%%~dpB
    Set Name1=%%~nxB
)

rem echo "%Folder1%"
rem echo "%Name1%"
rem pause

cd "%Folder1%"

TITLE Mp4 Video 1 Click - FFMPEG v.4.2.2 32-bit - Encode to HLS (software libx264)

set PATH=%Folder%;%SYSTEMROOT%\SysWOW64;%SYSTEMROOT%\System32


ffmpeg.exe -i "%Name1%" -profile:v baseline -level 3.0 -start_number 0 -hls_time 10 -hls_list_size 0 -f hls "%Name1%.m3u8"


  


• How can I convert multiple images to a video file while keeping the same file name ? [duplicate]

  13 juillet 2015, par Ertzi

  This question already has an answer here :

  • execute ffmpeg command in a loop
    
    2 answers
    

  My intention would be to get at the same time, picture1.jpg, picture2.jpg, picture3.jpg to video format such as picture1.mp4, picture2.mp4, picture3.mp4.

  I am currently using Mencoder and Linux bash code mencoder mf: //*.jpg -mf w = 1366: h = 768: fps = 6/60: type = jpg -ovc copy -oac copy -o images.mp4. But this command makes all the images into one video file (images.mp4).

  Can I do it with mencoder or ffmpeg ?
  My linux bash coding skills are basic.