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• vf_codecview.c printing motion vectors in 'future' only

  21 février 2018, par helmo

  I am trying to understand the way ffmpeg draws motion vectors.

  I went through the vf_codecview.c file and saw the function draw_arrow which takes only those vectors where source > 0 implying only those from the future.

  Does anyone know why is this ? And what’s the use of computing past and future, if ffmpeg through this file takes only the future ?

• Update README.md

  14 novembre 2017, par murilolobato

  Update README.md
  Applied suggestions
  

• FFMPEG filter is not implementing

  31 août 2017, par Alok Kumar Verma

  I’m using FFMPEG for applying and saving the file to the specified path. Since I’m new to FFMPEG so I’ve followed this link to import the FFMPEG libraries inside my project.

  FFMPEG libraries are working fine inside my project. Now I’ve followed FFMPEG Commands link for applying filters using commands. For now i’m using vintage filter command to check whether it is working or not

  I’ve followed FFMPEG Project in Android link to apply the filters and save it to my storage path.

  I’m using a file from my storage path to apply filter for the same and saving them inside the specified path. The problem is that the command is implementing(doubtful) but no file is getting saved with the filters, nor I get any exception or any error in my logcat. I"m very doubtful whether what is being left to get the desired result.

  This is my code where I’m using the FFMPEG for applying filters and saving them in the specified path.

  FilterAcitivity.java

  public class FilterActivity extends AppCompatActivity {
  
  
  
  private ArrayList<string> videoReceiveddata = null;
  
  
  
  private EPlayerView ePlayerView;
  
  
  
  private StringBuilder stringBuilder;
  
  
  
  private DataSource.Factory dataSourceFactory;
  
  private ExtractorsFactory extractorsFactory;
  
  
  
  private Button play,stop,noneFilter,faded,noir,instant;
  
  
  
  private FFmpeg fFmpeg;
  
  
  
  private int choice = 0;
  
  
  
  @Override
  
  protected void onCreate(Bundle savedInstanceState) {
  
      super.onCreate(savedInstanceState);
  
      setContentView(R.layout.activity_filter);
  
  
  
      Bundle videoExtras = getIntent().getExtras();
  
  
  
      videoReceiveddata = videoExtras.getStringArrayList("sendData");
  
      Log.e("RECEIVED_VIDEO====", videoReceiveddata.toString());
  
  
  
      stringBuilder = new StringBuilder();
  
      for(String path : videoReceiveddata){
  
          stringBuilder.append(path);
  
      }
  
  
  
      //laoding the ffmpeg binary files
  
      loadFFMEPGBinary();
  
  
  
  
  
      BandwidthMeter bandwidthMeter = new DefaultBandwidthMeter();
  
      TrackSelection.Factory videoTrackSelectionFactory =
  
              new AdaptiveTrackSelection.Factory(bandwidthMeter);
  
      TrackSelector trackSelector =
  
              new DefaultTrackSelector(videoTrackSelectionFactory);
  
      // Measures bandwidth during playback. Can be null if not required.
  
      DefaultBandwidthMeter defaultBandwidthMeter = new DefaultBandwidthMeter();
  
      // Produces DataSource instances through which media data is loaded.
  
      dataSourceFactory = new DefaultDataSourceFactory(getApplicationContext(),
  
              Util.getUserAgent(getApplicationContext(), "TestApp"), defaultBandwidthMeter);
  
      // Produces Extractor instances for parsing the media data.
  
      extractorsFactory = new DefaultExtractorsFactory();
  
      // This is the MediaSource representing the media to be played.
  
      MediaSource videoSource = new ExtractorMediaSource(Uri.parse(stringBuilder.toString()),
  
              dataSourceFactory, extractorsFactory, null, null);
  
  
  
  
  
      // 2. Create the player
  
      final SimpleExoPlayer player =
  
              ExoPlayerFactory.newSimpleInstance(getApplicationContext(), trackSelector);
  
      player.prepare(videoSource);
  
  
  
      ePlayerView = (EPlayerView) findViewById(R.id.ePlayer);
  
      ePlayerView.setSimpleExoPlayer(player);
  
      ePlayerView.onResume();
  
  
  
  
  
  
  
      play = (Button) findViewById(R.id.playButton);
  
      stop = (Button) findViewById(R.id.stopButton);
  
      faded = (Button) findViewById(R.id.fadedFilter);
  
      noneFilter = (Button) findViewById(R.id.noFilter);
  
      noir = (Button) findViewById(R.id.noirFilter);
  
      instant = (Button) findViewById(R.id.instantFilter);
  
  
  
      play.setOnClickListener(new View.OnClickListener() {
  
          @Override
  
          public void onClick(View view) {
  
              MediaSource videoSource = new ExtractorMediaSource(Uri.parse(stringBuilder.toString()),
  
                      dataSourceFactory, extractorsFactory, null, null);
  
              player.prepare(videoSource);
  
              player.setPlayWhenReady(true);
  
          }
  
      });
  
  
  
      stop.setOnClickListener(new View.OnClickListener() {
  
          @Override
  
          public void onClick(View view) {
  
              player.stop();
  
          }
  
      });
  
  
  
      noneFilter.setOnClickListener(new View.OnClickListener() {
  
          @Override
  
          public void onClick(View view) {
  
              choice = 1;
  
              ePlayerView.setGlFilter(new GlFilter());
  
          }
  
      });
  
  
  
      faded.setOnClickListener(new View.OnClickListener() {
  
          @Override
  
          public void onClick(View view) {
  
              choice = 2;
  
              ePlayerView.setGlFilter(new GlSepiaFilter());
  
              Log.e("Filter Applied",ePlayerView.toString());
  
              Log.e("Filter Applied====",stringBuilder.toString());
  
  
  
          }
  
      });
  
  }
  
  
  
  //loading binary of ffmpeg
  
  private void loadFFMEPGBinary() {
  
      try {
  
          if (fFmpeg == null) {
  
              Log.e("TEST=====", "ffmpeg : null");
  
              fFmpeg = FFmpeg.getInstance(this);
  
          }
  
  
  
          fFmpeg.loadBinary(new LoadBinaryResponseHandler() {
  
              @Override
  
              public void onFailure() {
  
                  showUnsupportedExceptionDialog();
  
              }
  
  
  
              @Override
  
              public void onSuccess() {
  
                  Log.d("TESTAPP====", "ffmpef : coorect loaded");
  
              }
  
          });
  
      } catch (FFmpegNotSupportedException e) {
  
          showUnsupportedExceptionDialog();
  
      } catch (Exception e) {
  
          Log.d("TESTAPP=====", "Exception not supported" + e);
  
      }
  
  }
  
  
  
  private void showUnsupportedExceptionDialog() {
  
      new AlertDialog.Builder(FilterActivity.this)
  
              .setIcon(android.R.drawable.ic_dialog_alert)
  
              .setTitle("Not Supported")
  
              .setMessage("Device Not Supported")
  
              .setCancelable(false)
  
              .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
  
                  @Override
  
                  public void onClick(DialogInterface dialog, int which) {
  
                      FilterActivity.this.finish();
  
                  }
  
              })
  
              .create()
  
              .show();
  
  }
  
  
  
  @Override
  
  public boolean onCreateOptionsMenu(Menu menu) {
  
      MenuInflater menuInflater = getMenuInflater();
  
      menuInflater.inflate(R.menu.filter_menu,menu);
  
      return true;
  
  }
  
  
  
  @Override
  
  public boolean onOptionsItemSelected(MenuItem item) {
  
  
  
      switch (item.getItemId()) {
  
          case R.id.save:
  
              if(choice == 1){
  
                  addThatFilter();
  
              }else if(choice == 2){
  
                  Toast.makeText(getApplicationContext(),"No filter",
  
                          Toast.LENGTH_SHORT).show();
  
              }
  
          default:
  
              return super.onOptionsItemSelected(item);
  
      }
  
  }
  
  
  
  private void addThatFilter() {
  
  
  
      String savingPath = Environment.getExternalStorageDirectory().getAbsolutePath().toString()
  
              + "/FilterVideo.mp4";
  
  
  
      String complexCommand = "ffmpeg -y -i"+ stringBuilder.toString() +"-strict experimental -vf " +
  
              "curves=vintage -s 640x480 -r 30 -aspect 4:3 -ab 48000 -ac 2 -ar 22050 -b 2097k -vcodec " +
  
              savingPath;
  
  
  
      execFFMPEGBinary(complexCommand);
  
  }
  
  
  
  private void execFFMPEGBinary( final String complexCommand) {
  
  
  
      try{
  
  
  
          fFmpeg.execute(new String[]{complexCommand}, new ExecuteBinaryResponseHandler(){
  
  
  
              @Override
  
              public void onFailure(String message) {
  
                  Log.e("Failed with output", message);
  
              }
  
  
  
              @Override
  
              public void onSuccess(String message) {
  
                  Toast.makeText(getApplicationContext(),"Success!",Toast.LENGTH_SHORT)
  
                          .show();
  
              }
  
          });
  
      }catch (FFmpegCommandAlreadyRunningException e){
  
          //do nothing
  
      }
  
  } }
  
  </string>