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• FFMPEG in android issue

  9 janvier 2012, par Antu

  I have successfully compiled the FFMPEG library to android using NDK.
  (using Rock Player FFMPEG implementation)http://www.rockplayer.com/download/rockplayer_ffmpeg_git_20100418.zip

  I know that FFMPEG supports .avi, divX, mov ect. But I created a mediaplayer and tried to run them but I was not able to play them. I is this the right way to use the FFMPEG library. Can Any one Help.I am able to play defaut video, mp4, 3gp etc. Here is the code for mediaplayer

     public native String  stringFromJNI();
  
        static {
  
           System.loadLibrary("ffmpeg");
  
           System.loadLibrary("ffmpeg-test-jni");
  
               }
  
      @Override
  
        public void onCreate(Bundle savedInstanceState) {
  
        super.onCreate(savedInstanceState);
  
  
  
  
  
      setContentView(R.layout.main);
  
  
  
      TextView  tv =(TextView) findViewById(R.id.textView1);
  
      tv.setText( stringFromJNI() );
  
  
  
  
  
      System.gc();
  
  
  
      Log.d("Video FFmpeg ", "**");
  
  
  
      getWindow().setFormat(PixelFormat.TRANSLUCENT);
  
      String filepath = Environment.getExternalStorageDirectory()+"/simple.avi";
  
  
  
      Log.d("File path", filepath);
  
  
  
      MediaController mc = new MediaController(this); 
  
  
  
      VideoView video=(VideoView) findViewById(R.id.video);
  
      mc.setMediaPlayer(video);
  
      video.setVideoPath(filepath);
  
      video.setMediaController(mc);
  
      mc.show();
  
      //video.setVideoPath("/mnt/sdcard/Movies/Ishq-Hothon-Se.3gp");
  
  
  
      video.start();     
  
      View nextButton = findViewById(R.id.button1);
  
      nextButton.setOnClickListener(this);
  
      }
  
  
  
  
  
  
  
    @Override
  
    public void onClick(View v) {
  
    // TODO Auto-generated method stub
  
    Intent i=new Intent(this,NextVideo.class);
  
     startActivity(i);
  
  
  
    }
  
  
  
    }

• why ffmpeg muxingoverhead:unknown ?

  17 mai 2021, par 전재현

  i put on mac terminal ffmpeg -video_size 1280x1344 -r 25 -pix_fmt yuv420p -i /usr/local/bin/yuvdata.yuv image%d.png

  


  the result is always video:121123kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : unknown

  


  how to solve this problem ??
Help me please

  


• How do you run ffmpeg from Java, without crashing ?

  30 juin 2024, par WinnieTheDampoeh

  I try running ffmpeg from Java, and for a couple of moments everything is working fine. I want ffmpeg to record my screen, and split the recording into small clips. The command is working fine from the terminal, but when I run it from Java I get at most 3 clips. Ffmpeg doesn't write anything to the InputStream, so I have no idea what's going wrong.

  


  public static void execute(int frameRate, int width, int height, String windowTitle) {
      String[] args = new String[]{
              path,
              "-hide_banner",
              "-f", "gdigrab",
              "-thread_queue_size", "1024",
              "-rtbufsize", "256M",
              "-framerate", "" + frameRate,
              "-offset_x", "0",
              "-offset_y", "0",
              "-video_size", "" + width + "x" + height,
              "-draw_mouse", "1",
              "-i", "title=" + windowTitle,
              "-c:v", "libx264",
              "-r", "" + frameRate,
              "-preset", "ultrafast",
              "-tune", "zerolatency",
              "-crf", "28",
              "-pix_fmt", "yuv420p",
              "-movflags", "+faststart",
              "-y",
              "-f", "segment",
              "-reset_timestamps", "1",
              "-segment_time", "1",
              "output%06d.mp4"
      };

      try {
          Process p = Runtime.getRuntime().exec(args);
          Thread thread = new Thread(() -> {
              String line;
              BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));

              System.out.println("TEST");
              try {
                  while ((line = input.readLine()) != null)
                      System.out.println(line);

                  System.out.println("Stopping with reading");
                  input.close();
              } catch (IOException e) {
                  e.printStackTrace();
              }
          });
          int exitCode = p.waitFor();
          thread.start();
          thread.join();
          if (exitCode != 0) {
              throw new RuntimeException("FFmpeg exited with code " + exitCode);
          }
      } catch (IOException | InterruptedException e) {
          throw new RuntimeException(e);
      }
  }


  


  I've run the same command in the terminal. That worked fine. I ran the code above, but that resulted in ffmpeg stopping after 3 clips. It kept showing as working from the task manager. As said before, ffmpeg doesn't write anything to the InputStream, even though it normally does write a lot in the terminal. The weird thing is, when I stop my Java program, but accidentally keep ffmpeg running, it suddenly does everything I wanted it to. It didn't capture the things between stopping and closing Java, but after that it continues like it should have.