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• Packaging linux binary in Android apk

  5 avril 2014, par StackOverflowed

  If I want to include a linux binary (like ffmpeg) in my .apk file (only for ARM based devices), is this possible to distribute for non rooted phones ? I know it's possible to call an included binary with Runtime.exec() but is it a recommended practice ?

• Video manipulation from Android NDK [closed]

  21 février 2013, par Drag0

  I'm having problems with trying to manipulate videos with Android NDK.
  I don't need many things, I just need my app to take frames from video so I can analyze it, but it has to be done within NDK.

  I tried building ffmpeg for Android, I couldn't get it to work (or I just wasn't following the right guides and tutorials), and I also found that newest version of NDK has built in libs for video manipulation (but only for .ts format if I'm correct so that doesn't help me much).

  Can anyone recommend me anything ? Maybe some new guide or tutorial for building ffmpeg.
  Please respond only if you used it yourself. Thanks !

• Running ffmpeg commands from android ffmpeg syntax error in logcat

  30 septembre 2015, par Chaitanya Chandurkar

  I have successfully compiled ffmpeg for android and have ported it.

  I placed

  1. libffmpeg.so in /system/lib directory
  2. ffmpeg executable in /system/bin and /system/xbin directory (i was not sure where to place it). i directly copied ffmpeg executable from source directory (Not sure whether it’s a correct way)

  Now i am executing commands from android with following code !!

  imports *
  
  public class LatestActivity extends Activity {
  
  
  
      private Process process;
  
      String command,text;
  
  
  
      static { 
  
          System.loadLibrary("ffmpeg");
  
      }
  
  
  
    @Override
  
      public void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.activity_latest);
  
  
  
            //Execute Command !!  
  
            try {
  
                 Execute();
  
            } catch (IOException e) {
  
                // TODO Auto-generated catch block
  
                e.printStackTrace();
  
            } catch (InterruptedException e) {
  
                 // TODO Auto-generated catch block
  
                  e.printStackTrace();
  
            }
  
       }
  
  
  
  
  
  
  
  
  
  public void Execute() throws IOException, InterruptedException{
  
          try {
  
              File dir=new File("/system/bin");
  
              String[] cmd= {"ffmpeg","-codecs"};
  
  
  
              process=Runtime.getRuntime().exec(cmd,null,dir);
  
          } catch (IOException e) {
  
              // TODO Auto-generated catch block
  
              Log.d("Process IOException starts:",e.getMessage());
  
              e.printStackTrace();
  
              Log.d("System Manual exit !!",e.getMessage());
  
              System.exit(MODE_PRIVATE);
  
          }
  
  
  
          BufferedReader stdInput = new BufferedReader(new InputStreamReader(process.getInputStream()),16384);
  
  
  
           BufferedReader stdError = new BufferedReader(new InputStreamReader(process.getErrorStream()));
  
  
  
             // read the output from the command
  
             Log.d("Application output: ","Output if any !"); 
  
              while ((text = stdInput.readLine()) != null) {
  
                  Log.d("Output: ",text); //$NON-NLS-1$
  
                 }
  
  
  
  
  
          text="";
  
             // read any errors from the attempted command
  
          Log.d("Application output: ","Errors if any !");  //$NON-NLS-1$
  
             while ((text = stdError.readLine()) != null) {
  
  
  
                 Log.d("Error: ",text);  //$NON-NLS-1$
  
             }
  
  
  
  
  
  
  
             stdInput.close();
  
             stdError.close();
  
  
  
             process.waitFor();
  
             process.getOutputStream().close();
  
             process.getInputStream().close();
  
             process.getErrorStream().close(); 
  
             destroyProcess(process);
  
             //process.destroy();
  
  
  
      }
  
  
  
      private static void destroyProcess(Process process) {
  
          try {
  
              if (process != null) {
  
                  // use exitValue() to determine if process is still running.
  
                  process.exitValue();
  
              }
  
          } catch (IllegalThreadStateException e) {
  
              // process is still running, kill it.
  
              process.destroy();
  
          }
  
      }
  
  
  
    }

  And Here is the logcat output :

  09-05 15:29:13.287: D/dalvikvm(2670): No JNI_OnLoad found in /system/lib/libffmpeg.so 0x44e7e910, skipping init
  
  09-05 15:29:29.117: I/global(2670): Default buffer size used in BufferedReader constructor. It would be better to be explicit if an 8k-char buffer is required.
  
  09-05 15:29:29.117: D/Application output:(2670): Output if any !
  
  09-05 15:29:29.117: D/Application output:(2670): Errors if any !
  
  09-05 15:29:29.127: D/Error:(2670): /system/bin/ffmpeg: 1: Syntax error: "(" unexpected

  m neither getting any errors nor output of command.
  At the end it shows syntax error.
  I want to know what kind of syntax error it is. how to tackle it ?

  m i doing something wrong ?