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• FFmpeg - cannot find ExecuteBinaryResponseHandler - Android/Java

  20 juillet 2018, par pudility

  I am trying to make a module for react-native that will change a video into a gif. I have little to no experience with android studios/java, but I would love to learn more ! I am using this library to convert the video to a gif. Here is my code :

  package com.reactlibrary;
  
  
  
  import android.widget.Toast;
  
  import com.facebook.react.bridge.ReactApplicationContext;
  
  import com.facebook.react.bridge.ReactContextBaseJavaModule;
  
  import com.facebook.react.bridge.ReactMethod;
  
  import com.github.hiteshsondhi88.libffmpeg.FFmpeg;
  
  
  
  public class RNGifMakerModule extends ReactContextBaseJavaModule {
  
  
  
    private final ReactApplicationContext reactContext;
  
  
  
    public RNGifMakerModule(ReactApplicationContext reactContext) {
  
      super(reactContext);
  
      this.reactContext = reactContext;
  
    }
  
  
  
    @Override
  
    public String getName() {
  
      return "RNGifMakerModule";
  
    }
  
  
  
    @ReactMethod
  
    public void alert(String message) {
  
        Toast.makeText(getReactApplicationContext(), "Error", Toast.LENGTH_LONG).show();
  
        String[] cmd = {"-i"
  
                , message
  
                , "Image.gif"};
  
        conversion(cmd);
  
    }
  
  
  
    public void conversion(String[] cmd) {
  
  
  
      FFmpeg ffmpeg = FFmpeg.getInstance(this.reactContext);
  
  
  
      try {
  
  
  
  
  
        // to execute "ffmpeg -version" command you just need to pass "-version"
  
        ffmpeg.execute(cmd, new ExecuteBinaryResponseHandler() {
  
  
  
          @Override
  
          public void onStart() {
  
          }
  
  
  
          @Override
  
          public void onProgress(String message) {
  
          }
  
  
  
          @Override
  
          public void onFailure(String message) {
  
          }
  
  
  
          @Override
  
          public void onSuccess(String message) {
  
          }
  
  
  
          @Override
  
          public void onFinish() {
  
          }
  
        });
  
      } catch (FFmpegCommandAlreadyRunningException e) {
  
        // Handle if FFmpeg is already running
  
        e.printStackTrace();
  
      }
  
    }
  
  }

  And I get this error :

  Error:(43, 31) error: cannot find symbol class ExecuteBinaryResponseHandler

  This seems odd to be, because in the documentation for ffmpeg-android-java it says to use almost exactly the same code.

  Bounty

  The bounty will be awarded to you if you can find a way to convert a video.mp4 into a gif. You do not necessarily have to use FFmpeg, but your solution has to work with java/android studios.

• Fluent-ffmpeg and complex filter in Electron (node)

  9 juillet 2016, par Matt Sergej Rinc

  I want to use fluent-ffmpeg module to call ffmpeg with complex filter from Electron but have no success. The error ’[AVFilterGraph @ 0xb8.......] No such filter " Error initalizing complex filters . Invalid argument’ is the same as in this question Error : Running FFmpeg command in Android ,splitting command in array not working but the context is different.

  What is needed ?
  Run this ffmpeg command using fluent-ffmpeg :

  ffmpeg -i safework-background-0.mp4 -i image1.png -i image2.png -i
  image3.png -filter_complex "[0:v][1:v]
  overlay=1:1:enable=’between(t,5,8.5)’ [tmp] ; [tmp][2:v]
  overlay=1:1:enable=’between(t,8.5,12)’ [tmp] ; [tmp][3:v]
  overlay=1:1:enable=’between(t,12,15)’" test-video-safework3.mp4

  It uses a complex filter to overlay three images on a video in sequence and exports a new video.

  What doesn’t work ?
  Obviously fluent-ffmpeg chokes with required quotes for complex filter, that is my conclusion (and is the same as for the Android variant question above).

  What works without fluent-ffmpeg in Electron ?
  As you can guess I have to resort to calling ffmpeg directly. To help others, the following command, with input and output video filenames parametrized, translates to Electron as :

    var spawn = require('child_process').spawn
  
    var fargs = ['-y', '-i', sourceDir.path() + '/' + inVideoName, '-i', tempDir.path() + '/' + 'image1.png',
  
    '-i', tempDir.path() + '/' + 'image2.png', '-i', tempDir.path() + '/' + 'image3.png',
  
    '-filter_complex', '[0:v][1:v]overlay=1:1:enable=\'between(t,5,8.5)\'[tmp];' +
  
    '[tmp][2:v]overlay=1:1:enable=\'between(t,8.5,12)\'[tmp];[tmp][3:v]' +
  
    'overlay=1:1:enable=\'between(t,12,15)\'', targetDir.path() + '/' + outVideoName]
  
    var ffmpeg = spawn(ffmpegc, fargs, { cwd:jetpack.cwd(app.getPath('home')).path() })
  
  // some code ommitted
  
    ffmpeg.on('close', (code) => {
  
      console.log(`child process exited with code ${code}`)
  
      webContents.send('notify-user-reply', 'Video processing done.')
  
    })

  The above command already has removed spaces between various filters (in complex filter) for each image or it would also choke.

  I would really love to use fluent-ffmpeg in Electron, not just for the convenience of calling ffmpeg more elegantly but also for some additional features like easy progress reporting.

• JavaCV read video and record

  4 janvier 2015, par John

  I am trying to merge mp4 and mp3 on Android, I am using the JavaCV, please check my code below first, then I explained the strange error after :

  private void test2() throws Exception {
  
      String path = Environment.getExternalStorageDirectory()
  
              .getAbsolutePath();
  
  
  
      int testId = 4;
  
      String videoPath = path + "/" + "sample" + testId + ".mp4";
  
      String audioPath = path + "/" + "love.mp3";
  
      String outputPath = path + "/" + "out" + testId + ".mp4";
  
  
  
      FrameGrabber grabber1 = new FFmpegFrameGrabber(videoPath);
  
      FrameGrabber grabber2 = new FFmpegFrameGrabber(audioPath);
  
  
  
      grabber1.start();
  
      grabber2.start();
  
  
  
      FrameRecorder recorder = new FFmpegFrameRecorder(outputPath,
  
              grabber1.getImageWidth(), grabber1.getImageHeight(),
  
              grabber2.getAudioChannels());
  
  
  
      double frameRate = grabber1.getFrameRate();
  
      recorder.setFrameRate(frameRate);
  
      recorder.setSampleRate(grabber2.getSampleRate());
  
      recorder.setVideoQuality(1);
  
  
  
      recorder.start();
  
  
  
      Frame frame1, frame2 = null;
  
  
  
      // getLengthInTime is correct, but getLengthInFrames not accurate.
  
      Log.d(TAG, " Video lengthInTime:" + grabber1.getLengthInTime()
  
              + " Video frames:" + grabber1.getLengthInFrames());
  
  
  
      // Record video.
  
      int count = 0;
  
      while (true) {
  
          frame1 = grabber1.grabFrame();
  
          if (frame1 == null) {
  
              break;
  
          }
  
  
  
          frame1.samples = null;
  
          recorder.record(frame1);
  
          count++;
  
  
  
          Log.d(TAG, "Video frame timestamp:" + grabber1.getTimestamp());
  
      }
  
      Log.d(TAG, " Video frame count:" + count);
  
  
  
      // Record audtio.
  
      long videoTimestamp = recorder.getTimestamp();
  
      while (true) {
  
          frame2 = grabber2.grabFrame();
  
          if (frame2 != null && grabber2.getTimestamp() <= videoTimestamp) {
  
              frame2.image = null;
  
              recorder.record(frame2);
  
  
  
              // Log.d(TAG, "Audio frame timestamp:" +
  
              // grabber2.getTimestamp());
  
          } else {
  
              break;
  
          }
  
      }
  
  
  
      // release
  
      recorder.stop();
  
      recorder.release();
  
  
  
      grabber1.stop();
  
      grabber2.stop();
  
  }

  The output’s audio is OK, but the video is strangle. The video play 1s and stop 1s, then repeat like this. The input video I recorded by Phone’s camera.

  I tried to count the real number of video frames, and I found the real number is much bigger than the number got from method getLengthInFrames().