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• In Android run asyn task inside Worker class of WorkManager

  29 mars 2019, par Usman Rana

  I’ve a Worker in which i first want to apply FFMPEG command before uploading it to server. As Worker is already running in background so to keep the result on hold until file uploads I’ve used RxJava .blockingGet() method. But I’m unable to understand that how to execute FFmpeg command synchronously by anyway i.e. RxJava etc. One tip that I found is to use ListenableWorker but it’s documentation says that it stops working after 10 minutes. So, i don’t want to go with that solution. Following is the method of FFmpeg just like any other async method. How can i make it synchronous or integrate it with RxJava ? Any ideas would be appreciable.

   ffmpeg.execute(command, new ExecuteBinaryResponseHandler() {
  
                      @Override
  
                      public void onFailure(String s) {
  
                      }
  
  
  
                      @Override
  
                      public void onSuccess(String s) {
  
                         uploadMediaItem(mediaUpload);
  
                      }
  
  
  
                      @Override
  
                      public void onProgress(String s) {
  
                      }
  
  
  
                      @Override
  
                      public void onStart() {
  
                      }
  
  
  
                      @Override
  
                      public void onFinish() {
  
  
  
                          // countDownLatch.countDown();
  
  
  
                      }
  
                  });

  This is the flow of my Worker :

  1. check pending post count in DB.
  2. Pick first post and check if it has pending media list to upload.
  3. Pick media recursively and check if editing is required on it or not.
  4. Apply FFmpeg editing and upload and delete from DB.
  5. Repeat the cycle until last entry in the DB.

  Thanks

• I want to convert my 3gp audio file to .wav formate

  11 mars 2020, par gowthami

  I want to convert my 3gp audio to .wav format. I used ffmpeg to convert that one. In that it is showing success not getting any error. But i am unable to get the final output file. Please help me to solve this issue.

  Here is my code.

  sampleDir = new File(Environment.getExternalStorageDirectory().getAbsolutePath(), "/OfficeRecordings/");
  
      if (!sampleDir.exists()) {
  
          sampleDir.mkdirs();
  
      }
  
  
  
      outputFile =  sampleDir+"/"+"sample_record.3gp";
  
  
  
      finalFile =  sampleDir+"/"+"final_record.wav"; 
  
  
  
      final String[] cmd = new String[]{"-y", "-i", outputFile, finalFile};
  
  
  
  
  
      execFFmpegBinary(cmd);
  
  
  
  
  
   private void execFFmpegBinary(final String[] command) {
  
  
  
          FFmpeg ffmpeg = FFmpeg.getInstance(this);
  
          try {
  
              FFmpeg.getInstance(MainActivity.this).loadBinary(new FFmpegLoadBinaryResponseHandler() {
  
                  @Override
  
                  public void onStart() {
  
                      Log.e("start",".......");
  
  
  
                  }
  
  
  
                  @Override
  
                  public void onSuccess() {
  
  
  
                      Log.e("success",".......");
  
                  }
  
  
  
                  @Override
  
                  public void onFailure() {
  
                      Log.e("fail",".......");
  
  
  
                  }
  
  
  
                  @Override
  
                  public void onFinish() {
  
                      Log.e("finish",".......");
  
  
  
                  }
  
              });
  
          } catch (FFmpegNotSupportedException e) {
  
              e.printStackTrace();
  
          }

• Displaying progress while working on FFMpegConverter ?

  1er novembre 2017, par GreenRoof

  During a part of my project, I should download video data and audio data of a youtube link and merge them using NReco.VideoConverter. So this here is my code :

  public class Download {
  
      public NReco.VideoConverter.FFMpegConverter ffMpeg;
  
      public BackgroundWorker bgWorker;
  
  
  
      public Download (BackgroundWorker bgWorker) {
  
          this.BgWorker = BgWorker;
  
          var ffMpeg = new NReco.VideoConverter.FFMpegConverter();
  
          ffMpeg.ConvertProgress += (s, e) => ReportProgress(Convert.ToInt64(e.Processed.TotalSeconds), Convert.ToInt64(e.TotalDuration.TotalSeconds));
  
      }
  
  
  
      public MergeData() {
  
          // Video data and Audio data are downloaded to tempVidPath and tempAudPath.
  
          ffMpeg.Invoke(String.Format("-i \"{0}\" -i \"{1}\" -y -c copy \"{2}\"", tempVidPath, tempAudPath, targetPath));
  
      }
  
  
  
      public ReportProgress(long part, long total) {
  
          bgWorker.ReportProgress(0, new string[] {part.ToString(), total.ToString()});
  
      }
  
  }
  
  
  
  public partial class App : Form {
  
      //**omit
  
      public void Execution() {
  
          bgWorker = new BackgroundWorker(); // bgWorker is already defined in Designer class.
  
          bgWorker.WorkerReportsProgress = true;
  
  
  
          Download Dnld = new Download(bgWorker);
  
  
  
          bgWorker.ProgressChanged += (s, e) => {
  
              string[] arr = ((System.Collections.IEnumerable)e.UserState).Cast().Select(x => x.ToString()).ToArray();
  
              progBar.Maximum = Int64.Parse(arr[1]);
  
              progBar.Value = Int64.Parse(arr[0]);
  
          };
  
  
  
          bgWorker.DoWork += (s, e) => {
  
              Dnld.MergeData()
  
          }
  
  
  
      }
  
  }

  Here, I have no idea how to keep progBar to track the merging process while two files are being merged. Is there any method like WebClinet.DownloadFileAsync so I can get progress data from the thread ?

  ** I didn’t write unnecessary codes so codes may complicated and inefficient. But there are much more codes so please understand that problems. :)