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• How to run ffmpeg from command line in android

  9 mars 2013, par user1662334

  I want to use ffmpeg using command line.I have saved ffmpeg.so in files directory in the project.But i am getting exception while doing so.This is the code :

  public class MainActivity extends Activity {
  
  
  
      Process p;
  
  
  
      @Override
  
      public void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.activity_main);
  
  
  
          Process p = Runtime.getRuntime().exec("/data/data/com.example.ffmpegnew/files/ffmpeg",null, new File("/data/data/com.example.ffmpegnew/files"));
  
  
  
          }
  
          catch(Exception e)
  
          {
  
              System.out.println("exception"+e);
  
          }
  
  
  
      }
  
  
  
  }

  This is the exception :

  09-16 16:21:24.992: I/System.out(2103): exceptionjava.io.IOException: Error running exec(). Commands: [/data/data/com.example.ffmpegnew/files/ffmpeg] Working Directory: /data/data/com.example.ffmpegnew/files Environment: null

  Please tell me what kind of mistake i am doing.Thanks.

• FFmpeg can't run in some device Android

  30 mars 2016, par tqn

  i’m working in a video processing project and now i’m using ffmpeg library in Android. I’m facing with a strange problem with asus zenphone 4 t00l (or all x86 device, I’ve just test in this x86 phone). When start command in project, app always crash :

  03-30 15:08:18.461 21068-21068/com.paditech.videa I/FFmpeg: Loading FFmpeg for armv7-neon CPU
  
  03-30 15:08:18.781 21068-21068/com.paditech.videa I/System.out: Success........
  
  03-30 15:26:12.933 21068-21068/com.paditech.videa E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 59
  
  03-30 15:26:12.933 21068-21068/com.paditech.videa E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 63
  
  03-30 15:26:15.913 21068-21068/com.paditech.videa D/VideoActivity: onDestroy
  
  03-30 15:26:18.993 21068-21068/com.paditech.videa I/FFmpeg: Loading FFmpeg for armv7-neon CPU
  
  03-30 15:26:19.263 21068-21068/com.paditech.videa I/System.out: Success........
  
  03-30 15:26:42.583 21068-21184/com.paditech.videa D/FFmpeg: Running publishing updates method
  
  03-30 15:26:42.583 21068-21068/com.paditech.videa E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 59
  
  03-30 15:26:42.583 21068-21068/com.paditech.videa E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 85
  
  03-30 15:26:42.683 21068-21068/com.paditech.videa D/VideoActivity: /data/data/com.paditech.videa/files/ffmpeg[1]: syntax error: '-�-4�' unexpected
  
  03-30 15:26:42.683 21068-21068/com.paditech.videa D/VideoActivity: /data/data/com.paditech.videa/files/ffmpeg[1]: syntax error: '-�-4�' unexpected

  First, I think the problem is ffmpeg library. So I created a test module with simple activity just load and run command and there’re no problem.

  Second, I’m afraid that app cannot load version ffmpeg, because in my log, it’s armv7-neon althought it’s x86 (In my test module, it display x86). And according my search result, may be a external library make app to use abi arm (Build.CPU_API="armv7"). So I try remove all library in gradle in module Test and detected a library. But check in aar file of library, it support all x86 and arm. But after remove it, app still crash with same log. And strangely, althogh Test module register as arm but it’still run success (External question : Why add library jp.wasabeef:picasso-transformations make system register as armv7 although it’s x86)

  Finally, i think problem is command. But after debug, I use same command for Test module but it still success. Now i’m still stuck with it. Could anyone help me to solve it. Thanks. Here my demo code :

      String input = "/storage/emulated/0/Videa/Video/VIDEO_20160122_160020.mp4";
  
      String output = "/storage/emulated/0/Videa/Audio/AUDIO_20160330_142501.wav";
  
      String[] command = {
  
              "-y",
  
              "-i",
  
              input,
  
              "-vn",
  
              "-f",
  
              "wav",
  
              output
  
      };
  
      FFmpeg ffmpeg = FFmpeg.getInstance(getApplicationContext());
  
      try {
  
          ffmpeg.execute(command, new ExecuteBinaryResponseHandler() {
  
  
  
              @Override
  
              public void onSuccess(String message) {
  
                  super.onSuccess(message);
  
                  System.out.println("Success " + message);
  
              }
  
  
  
              @Override
  
              public void onFailure(String message) {
  
                  super.onFailure(message);
  
                  System.out.println("Failure " + message);
  
              }
  
          });
  
      } catch (Exception e) {
  
          e.printStackTrace();
  
      }

  And here is Failed command :

      ArrayList<string> cmd = new ArrayList<string>();
  
      cmd.add("-y");
  
      cmd.add("-i");
  
      cmd.add(input);
  
      cmd.add("-vn");
  
      cmd.add("-f");
  
      cmd.add("wav");
  
      cmd.add(output);
  
      String[] result = new String[cmd.size()];
  
      return cmd.toArray(result);
  
  </string></string>

• Lego Mindstorms RSO Format

  14 juillet 2010, par Multimedia Mike — General

  I recently read a magazine article about Lego Mindstorms. Naturally, the item that caught my eye was the mention of a bit of Lego software that converts various audio file formats to a custom format called RSO that can be downloaded into a Mindstorms project to make the creation output audio. To read different sources, one might be left with the impression that there is something super-duper top secret proprietary about the format. Such impressions do not hold up under casual analysis of a sample file.

  A Google search for "filetype:rso" yielded a few pre-made sample that I have mirrored into the samples archive. The format appears to be an 8-byte header followed by unsigned, 8-bit PCM. More on the wiki. If FFmpeg could gain an RSO file muxer, that would presumably be a heroic feat to the Lego hacking community.