Recherche avancée

Sur d’autres sites (6956)

• Getting exception while trying to run ffmpeg via command line in android

  17 septembre 2012, par user1662334

  I want to use ffmpeg via command line arguments in android application.For this purpose :

  1. I have cross-compiled the ffmpeg lib and got the libffmpeg.so
  2. I have stored libffmpeg.so in files directory of the app.

  This is the code i am using :

  public class MainActivity extends Activity {
  
  
  
      Process p;
  
  
  
      @Override
  
      public void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.activity_main);
  
  
  
              String[] cmd =new String[4];
  
          cmd[0]="/data/data/com.example.ffmpegnew/files/libffmpeg";
  
          cmd[1]="-i";
  
          cmd[2]="mnt/sdcard/music/baba.mp4";
  
          cmd[3]="mnt/sdcard/music/outfile.mp4";
  
  
  
          p = Runtime.getRuntime().exec(cmd,null, new File("/data/data/com.example.ffmpegnew/files"));
  
  
  
          }
  
          catch(Exception e)
  
          {
  
              System.out.println("exception"+e);
  
          }
  
  
  
      }
  
  
  
  }

  This is the exception i am getting :

  09-17 13:47:01.679: I/System.out(3752): exceptionjava.io.IOException: Error running exec(). Command: [/data/data/com.example.ffmpegnew/files/libffmpeg.so, -i, mnt/sdcard/music/baba.mp4, mnt/sdcard/music/outfile.mp4] Working Directory: /data/data/com.example.ffmpegnew/files Environment: null

  Please tell me how to solve this problem.Thanks in advance.

• 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.

• Building FFmpeg for Android to use command line arguments

  28 juin 2013, par Zargoon

  I am trying to build the FFmpeg library to use in my android app with the NDK. The reason for this is because I am using the native video capture feature in android because I really don't want to write my own video recorder. However, the native video capture only allows for either high-quality encoding, or low quality encoding. I want something in between, and I believe that the solution is to use the FFmpeg library to re-encode the high quality video to be lighter.

  So far I have been able to build the FFmpeg library according to this guide : http://www.roman10.net/how-to-build-ffmpeg-for-android/ and which a few tweaks I have been able to get it to work.

  However, everything that I've found seems to be about writing your own encoder, which seems like overkill to me. All that I really want to do is send a string in command line format to the main() function of FFmpeg and re-encode my video. However, I can't seem to figure out how I build FFmpeg to give me access to the main method. I found this post : Compile ffmpeg.c and call its main() via JNI which links to a project doing what I want more of less, but for the life of me I cannot figure out what is going on. It also seems like he is compiling more than I want, and I would really like to keep my application as light weight as possible.

  Some additional direction would be extremely helpful. Thank you.