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• Android : Select from images extracted with FFMPEG

  21 juillet 2017, par Tix

  I’m currently able to extract images(frames) from a video, and display all the extracted images using the code below, how do i make it so that the displayed images could be selected by user and passed as a bitmap to another activity ?

  FFMPEG Compiled using

  compile ’com.writingminds:FFmpegAndroid:0.3.2’

  Complex Command used to get the frames/images

  String[] complexCommand = "-y", "-i", yourRealPath, "-an", "-framerate", "60", "-vf", "select=’gte(n,45)’", "-vsync", "0", dest.getAbsolutePath() ;

  Main Activity

          /**
  
           * Command for extracting images from video
  
           */
  
          private void extractImagesVideo(int startMs, int endMs) {
  
              File moviesDir = Environment.getExternalStoragePublicDirectory(
  
                      Environment.DIRECTORY_PICTURES
  
              );
  
  
  
              String filePrefix = "extract_picture";
  
              String fileExtn = ".jpg";
  
              String yourRealPath = getPath(MainActivity.this, selectedVideoUri);
  
  
  
              File dir = new File(moviesDir, "VideoEditor");
  
              int fileNo = 0;
  
              while (dir.exists()) {
  
                  fileNo++;
  
                  dir = new File(moviesDir, "VideoEditor" + fileNo);
  
  
  
              }
  
              dir.mkdir();
  
              filePath = dir.getAbsolutePath();
  
              File dest = new File(dir, filePrefix + "%03d" + fileExtn);
  
  
  
  
  
              Log.d(TAG, "startTrim: src: " + yourRealPath);
  
              Log.d(TAG, "startTrim: dest: " + dest.getAbsolutePath());
  
  
  
              String[] complexCommand = {"-y", "-i", yourRealPath, "-an", "-r", "1/2", "-ss", "" + startMs / 1000, "-t", "" + (endMs - startMs) / 1000, dest.getAbsolutePath()};
  
  
  
              execFFmpegBinary(complexCommand);
  
  
  
          }
  
  
  
       /**
  
           * Executing ffmpeg binary
  
           */
  
          private void execFFmpegBinary(final String[] command) {
  
              try {
  
                  ffmpeg.execute(command, new ExecuteBinaryResponseHandler() {
  
                      @Override
  
                      public void onFailure(String s) {
  
                          Log.d(TAG, "FAILED with output : " + s);
  
                      }
  
  
  
                      @Override
  
                      public void onSuccess(String s) {
  
                          Log.d(TAG, "SUCCESS with output : " + s);
  
                          if (choice == 1 || choice == 2 || choice == 5 || choice == 6 || choice == 7) {
  
                              Intent intent = new Intent(MainActivity.this, PreviewActivity.class);
  
                              intent.putExtra(FILEPATH, filePath);
  
                              startActivity(intent);
  
                          } else if (choice == 3) {
  
                              Intent intent = new Intent(MainActivity.this, PreviewImageActivity.class);
  
                              intent.putExtra(FILEPATH, filePath);
  
                              startActivity(intent);
  
                          } else if (choice == 4) {
  
                              Intent intent = new Intent(MainActivity.this, AudioPreviewActivity.class);
  
                              intent.putExtra(FILEPATH, filePath);
  
                              startActivity(intent);
  
                          } else if (choice == 8) {
  
                              choice = 9;
  
                              reverseVideoCommand();
  
                          } else if (Arrays.equals(command, lastReverseCommand)) {
  
                              choice = 10;
  
                              concatVideoCommand();
  
                          } else if (choice == 10) {
  
                              File moviesDir = Environment.getExternalStoragePublicDirectory(
  
                                      Environment.DIRECTORY_MOVIES
  
                              );
  
                              File destDir = new File(moviesDir, ".VideoPartsReverse");
  
                              File dir = new File(moviesDir, ".VideoSplit");
  
                              if (dir.exists())
  
                                  deleteDir(dir);
  
                              if (destDir.exists())
  
                                  deleteDir(destDir);
  
                              choice = 11;
  
                              Intent intent = new Intent(MainActivity.this, PreviewActivity.class);
  
                              intent.putExtra(FILEPATH, filePath);
  
                              startActivity(intent);
  
                          }
  
                      }

  PreviewImageActivity

      public class PreviewImageActivity extends AppCompatActivity {
  
  
  
          private static final String FILEPATH = "filepath";
  
              @Override
  
              protected void onCreate(@Nullable Bundle savedInstanceState) {
  
                  super.onCreate(savedInstanceState);
  
                  setContentView(R.layout.activity_gallery);
  
                  getSupportActionBar().setDisplayHomeAsUpEnabled(true);
  
                  getSupportActionBar().setDisplayShowHomeEnabled(true);
  
                  TextView tvInstruction=(TextView)findViewById(R.id.tvInstruction) ;
  
  
  
                  GridLayoutManager lLayoutlLayout = new GridLayoutManager(PreviewImageActivity.this, 4);
  
                  RecyclerView rView = (RecyclerView)findViewById(R.id.recycler_view);
  
                  rView.setHasFixedSize(true);
  
                  rView.setLayoutManager(lLayoutlLayout);
  
                  String filePath = getIntent().getStringExtra(FILEPATH);
  
                  ArrayList<string> f = new ArrayList<string>();
  
  
  
  
  
  
  
     File dir = new File(filePath);
  
              tvInstruction.setText("Images stored at path "+filePath);
  
              File[] listFile;
  
  
  
                  listFile = dir.listFiles();
  
  
  
  
  
  
  
              for(File e:listFile)
  
              {
  
                  f.add(e.getAbsolutePath());
  
              }
  
  
  
              PreviewImageAdapter rcAdapter = new PreviewImageAdapter( f);
  
              rView.setAdapter(rcAdapter);
  
  
  
  
  
          }
  
      @Override
  
      public boolean onOptionsItemSelected(MenuItem item) {
  
          // handle arrow click here
  
          if (item.getItemId() == android.R.id.home) {
  
              finish(); // close this activity and return to preview activity (if there is any)
  
          }
  
  
  
          return super.onOptionsItemSelected(item);
  
      }
  
  }
  
  </string></string>

  PreviewImageAdapter

  public class PreviewImageAdapter extends RecyclerView.Adapter {
  
  
  
      private ArrayList<string> paths;
  
  
  
      public PreviewImageAdapter( ArrayList<string> paths) {
  
          this.paths = paths;
  
      }
  
  
  
      @Override
  
      public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
  
          View itemView = LayoutInflater.from(parent.getContext())
  
                  .inflate(R.layout.item_gallery, parent, false);
  
  
  
          return new MyViewHolder(itemView);
  
      }
  
  
  
      @Override
  
      public void onBindViewHolder(MyViewHolder holder, int position) {
  
          Bitmap bmp = BitmapFactory.decodeFile(paths.get(position));
  
          holder.ivPhoto.setImageBitmap(bmp);
  
      }
  
  
  
      @Override
  
      public int getItemCount() {
  
          return paths.size();
  
      }
  
  
  
      public class MyViewHolder extends RecyclerView.ViewHolder {
  
          private ImageView ivPhoto;
  
  
  
          public MyViewHolder(View itemView) {
  
              super(itemView);
  
  
  
              ivPhoto = (ImageView) itemView.findViewById(R.id.ivPhoto);
  
          }
  
      }
  
  
  
  }
  
  </string></string>

• FFmpeg record and stream

  16 janvier 2019, par Robert

  I’m getting the following error.

     E/FFmpeg: Exception while trying to run: 
  
     [/data/user/0/com.example.pathways.testipcam/files/ffmpeg, -y, -i, 
  
    rtsp://log:pass@IP:port/video.h264, -acodec, copy, -vcodec, copy, -t, 
  
  00:03:00, 
  
   content://com.example.android.fileprovider/external_files/Android/data/com.example.pathways.testipcam/files/Movies/IPcam_20190116_150628_6019720208966811003.m>kv]
  
  java.io.IOException: Cannot run program "/data/user/0/com.example.pathways.testipcam/files/ffmpeg": error=2, No such >file or directory

  OK I’m trying to learn how to record and stream my IP cam on android. I can stream the video in a surface view media player no problem so I then went to the record task. Now I’m a bit lost. I know this is possible as I have read people say they used this to do it.

  I started with implamenting

   implementation 'nl.bravobit:android-ffmpeg:1.1.5'

  But I can’t figure out what I am missing or doing wrong as there aren’t really any tutorials explaining this completely. So hopefully this can be the thread everyone else finds for a solution. I have listed my code below. Exactly what have I got wrong here. It runs and goes to onStart...then right on onFailure.
  DO I need to have 2 streams in order to view and watch ? or what the deal.
  I know FFmpeg can do that.
  "ffmpeg supports multiple outputs created out of the same input(s) in the same process. The usual way to accomplish this is :

  ffmpeg -i input1 -i input2 \
  -acodec … -vcodec … output1 \
  -acodec … -vcodec … output2 \"

  but I have no idea how to sue that.
  Anyway, I know I’m kind of close, at least I hope I need a little help on getting over the finish line on this. What have I done wrong, how does this work.

  Here is what I did, I streamed the video as the app does. no problem

      surfaceView = (SurfaceView) findViewById(R.id.videoView);
  
      _surfaceHolder = surfaceView.getHolder();
  
      _surfaceHolder.addCallback(this);
  
      _surfaceHolder.setFixedSize(320, 240);
  
  
  
   ....
  
  
  
   @Override
  
  public void surfaceCreated(SurfaceHolder holder) {
  
      mpPlayerRun();
  
  
  
  }
  
  
  
  public void mpPlayerRun(){
  
      _mediaPlayer = new MediaPlayer();
  
      _mediaPlayer.setDisplay(_surfaceHolder);
  
  
  
      try {
  
          // Specify the IP camera's URL and auth headers.
  
          _mediaPlayer.setDataSource(RTSP_URL);
  
  
  
          // Begin the process of setting up a video stream.
  
          _mediaPlayer.setOnPreparedListener(this);
  
          _mediaPlayer.prepareAsync();
  
      }
  
      catch (Exception e) {}
  
  }
  
  ...
  
   @Override
  
  public void onPrepared(MediaPlayer mp) {
  
      _mediaPlayer.start();
  
  }

  OK, so then I created a button to record.

  @Override
  
  public void onClick(View view) {
  
      switch (view.getId()) {
  
          case R.id.IPcamback:
  
              break;
  
  
  
          case R.id.IPcamrecord:
  
              if (ContextCompat.checkSelfPermission(this,
  
                      Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
  
                  takeIPvid();
  
              } else {
  
                  requestIPCamPermission();
  
              }

  .....

  requested permission then results.

      private void requestIPCamPermission() {
  
      if (ActivityCompat.shouldShowRequestPermissionRationale(this,
  
              Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
  
  
  
          new AlertDialog.Builder(this)
  
                  .setTitle("Permission needed")
  
                  .setMessage("This permission is needed do to android safety protocol")
  
                  .setPositiveButton("ok", new DialogInterface.OnClickListener() {
  
                      @Override
  
                      public void onClick(DialogInterface dialog, int which) {
  
                          ActivityCompat.requestPermissions(MainActivity.this,
  
                                  new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, 420);
  
                      }
  
                  })
  
                  .setNegativeButton("cancel", new DialogInterface.OnClickListener() {
  
                      @Override
  
                      public void onClick(DialogInterface dialog, int which) {
  
                          dialog.dismiss();
  
                      }
  
                  })
  
                  .create().show();
  
  
  
      } else {
  
          ActivityCompat.requestPermissions(this,
  
                  new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, 420);
  
      }
  
  }
  
  
  
  @Override
  
  public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
  
  
  
      if (requestCode == 420)  {
  
          if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
  
              takeIPvid();
  
          } else {
  
              Toast.makeText(this, "Permission DENIED", Toast.LENGTH_SHORT).show();
  
          }
  
   .....

  then I made the file provider and createVideoOutputFile() method and the takeIPvid method.

  private File createVideoOutputFile() throws IOException {
  
      String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
  
      String imageFileName = "IPcam_" + timeStamp + "_";
  
      IPstorageDir = getExternalFilesDir(Environment.DIRECTORY_MOVIES);
  
      IPvideo_file = File.createTempFile(
  
              imageFileName,  /* prefix */
  
              ".mp4",         /* suffix */
  
              IPstorageDir      /* directory */
  
      );
  
  
  
      // Save a file: path for use with ACTION_VIEW intents
  
      String IPmVideoFilename = IPvideo_file.getAbsolutePath();
  
      return IPvideo_file;
  
  }
  
  
  
     private void takeIPvid() {
  
  
  
          File ipfile = null;
  
          try {
  
              ipfile = createVideoOutputFile();
  
          } catch (IOException e) {
  
              e.printStackTrace();
  
          }
  
      IPvideo_uri = FileProvider.getUriForFile(this,
  
              "com.example.android.fileprovider",
  
              ipfile);
  
  
  
  
  
      String[] cmd = {"-y", "-i", "rtsp://Login:Passord@IP:port/video.h264", "-acodec", "copy", "-vcodec", "copy","-t","00:00:20", IPvideo_uri.toString() };
  
  
  
      FFmpeg.getInstance(this).execute(cmd,new ExecuteBinaryResponseHandler(){
  
  
  
          @Override
  
          public void onStart() {
  
              super.onStart();
  
  
  
  
  
          }
  
  
  
          @Override
  
          public void onFailure(String message) {
  
              super.onFailure(message);
  
  
  
  
  
  
  
          }
  
  
  
          @Override
  
          public void onSuccess(String message) {
  
              super.onSuccess(message);
  
  
  
  
  
          }
  
  
  
          @Override
  
          public void onProgress(String message) {
  
              super.onProgress(message);
  
  
  
          }
  
  
  
          @Override
  
          public void onFinish() {
  
              super.onFinish();
  
  
  
          }
  
      });
  
  
  
  }

• Why does ffmpeg need DNS resolver as its dependencies ?

  20 décembre 2019, par Kshitij

  I was installing FFmpeg and libav today using brew install ffmpeg libav when I noticed unbound in the dependencies list.

  It’s very strange because unbound is DNS resolver and why ffmpeg would need it.

  ❯ brew install ffmpeg libav
  
  ==> Installing dependencies for ffmpeg: aom, frei0r, gmp, libtasn1, nettle, p11-kit, unbound, gnutls, lame, libass, libbluray, libsoxr, libvidstab, libvpx, opencore-amr, opus, libsndfile, libsamplerate, rubberband, sdl2, speex, giflib, leptonica, tesseract, theora, x264, x265 and xvid

  I even checked the info list for ffmpeg but unbound was not present there

  ❯ brew info ffmpeg
  
  ffmpeg: stable 4.2.1 (bottled), HEAD
  
  Play, record, convert, and stream audio and video
  
  https://ffmpeg.org/
  
  /usr/local/Cellar/ffmpeg/4.2.1_2 (287 files, 56.6MB)*
  
  - Poured from bottle on 2019-12-19 at 10:45:56
  
  From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/ffmpeg.rb
  
  ==> Dependencies
  
  Build: nasm ✘, pkg-config ✔, texi2html ✘
  
  Required: aom ✔, fontconfig ✔, freetype ✔, frei0r ✔, gnutls ✔, lame ✔, libass ✔, libbluray ✔, libsoxr ✔, libvidstab ✔, libvorbis ✔, libvpx ✔, opencore-amr ✔, openjpeg ✔, opus ✔, rtmpdump ✔, rubberband ✔, sdl2 ✔, snappy ✔, speex ✔, tesseract ✔, theora ✔, x264 ✔, x265 ✔, xvid ✔, xz ✔
  
  ==> Options
  
  --HEAD
  
      Install HEAD version
  
  ==> Analytics
  
  install: 66,434 (30 days), 280,128 (90 days), 1,079,492 (365 days)
  
  install-on-request: 48,053 (30 days), 203,583 (90 days), 759,254 (365 days)
  
  build-error: 0 (30 days)

  Links for reference

  • https://formulae.brew.sh/formula/ffmpeg
  • https://formulae.brew.sh/formula/unbound