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• is that possible to serv hls and dash mpeg both at a time

  12 février 2020, par Rahul M

  actually i’m a kind a newbie to the Nginx RTMP server. I had setup my nginx.conf file to accept both hls and dash-mpeg. but the now problem is at a once I can able to serve either of the hls or dash-mpeg. so now my question is that possible to serve both hls and dash-mpeg at the same time for two different videos ? I’m streaming video from OBS Studio.
  here are my MPEG and hls code in nginx.conf file

  rtmp {
  
  server {
  
      listen 1935; # Listen on standard RTMP port
  
      chunk_size 4000;
  
  
  
      application show {
  
          live on;
  
          # Turn on HLS
  
          hls on;
  
          hls_path /nginx/hls/;
  
          hls_fragment 3;
  
          hls_playlist_length 60;
  
          deny play all;
  
      }
  
      application dash {
  
              live on;
  
              dash on;
  
              dash_path /nginx/dash;
  
  
  
      }
  
  }

  }

  thank you advance.

• Ffmpeg- Split video into 30 seconds parts in android

  22 novembre 2019, par Corgi Mogi

  I am working on a project. In which I want to split the video into 30 sec equal parts. If the video is 45 sec long than ideally in 30 and 15-sec parts. I already created a method which takes the starting and the ending point and run the Ffmpeg command to cut the video. This is what I created so far

     private void executeCutVideoCommand(int startMs, int endMs) {
  
          File moviesDir = Environment.getExternalStoragePublicDirectory(
  
                  Environment.DIRECTORY_MOVIES
  
          );
  
  
  
          String filePrefix = "cut_video";
  
          String fileExtn = ".mp4";
  
          String yourRealPath = getPath(VideoCutterActivity.this, selectedVideoUri);
  
          File dest = new File(moviesDir, filePrefix + fileExtn);
  
          int fileNo = 0;
  
          while (dest.exists()) {
  
              fileNo++;
  
              dest = new File(moviesDir, filePrefix + fileNo + fileExtn);
  
          }
  
  
  
          filePath = dest.getAbsolutePath();
  
          String[] complexCommand = {"-ss", "" + startMs / 1000, "-y", "-i", yourRealPath, "-t", "" + (endMs - startMs) / 1000,"-vcodec", "mpeg4", "-b:v", "2097152", "-b:a", "48000", "-ac", "2", "-ar", "22050", filePath};
  
  
  
          execFFmpegBinary(complexCommand);
  
          MediaScannerConnection.scanFile(VideoCutterActivity.this,
  
                  new String[] { filePath },
  
                  null,
  
                  new MediaScannerConnection.OnScanCompletedListener() {
  
  
  
                      public void onScanCompleted(String path, Uri uri) {
  
  
  
                          Log.i("ExternalStorage", "Scanned " + path + ":");
  
                          Log.i("ExternalStorage", "-> uri=" + uri);
  
                      }
  
                  });
  
  
  
  
  
      }
  
  
  
      /**
  
       * 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);
  
                          Intent intent = new Intent(VideoCutterActivity.this, PreviewActivity.class);
  
                          intent.putExtra(FILEPATH, filePath);
  
                          startActivity(intent);
  
                  }
  
  
  
                  @Override
  
                  public void onProgress(String s) {
  
                      progressDialog.setMessage("progress : " + s);
  
                  }
  
  
  
                  @Override
  
                  public void onStart() {
  
                      progressDialog.setMessage("Processing...");
  
                      progressDialog.show();
  
                  }
  
  
  
                  @Override
  
                  public void onFinish() {
  
                      progressDialog.dismiss();
  
  
  
  
  
                  }
  
              });
  
          } catch (FFmpegCommandAlreadyRunningException e) {
  
              // do nothing for now
  
          }
  
      }

  i tried to add a loop in method Calling But than app crashes

      cutVideo.setOnClickListener(new View.OnClickListener() {
  
              @Override
  
              public void onClick(View v) {
  
  
  
                  choice = 2;
  
  
  
                  if (selectedVideoUri != null) {
  
                      int start,end;
  
                      for (int i=0;i<=duration;i=i+30){
  
                          start=i;
  
                          end=start+30;
  
                          executeCutVideoCommand(start,end);
  
  
  
                      }
  
  //                    executeCutVideoCommand(rangeSeekBar.getSelectedMinValue().intValue() * 1000, rangeSeekBar.getSelectedMaxValue().intValue() * 1000);
  
  
  
                  } else
  
                      Snackbar.make(mainlayout, "Please upload a video", 4000).show();
  
              }
  
          });
  
  
  
  
  
      }

  I hope now you can what i want to do. I want to Ffmpeg command or method which split the video into 30-sec parts and place them on the given filepath. Let me know if we you wanna know more about the code. Help is much appreciated

• mp3/aac trim precision issue

  27 janvier 2020, par Massimo Vantaggio

  Due to mp3/aac codec doesn’t support that level of trim precision so im unable to get rounded container duration (without this 6 ms) :

  ffprobe -v error -show_entries format=duration \
  
  >   -of default=noprint_wrappers=1:nokey=1 output_audio.mp4
  
  372.006000

  MP4box generation get 6 ms more for every cycle :

  [...]
  
  Next generation scheduled in 3895 ms (DASH time 412006 ms)
  
  [...]
  
  Next generation scheduled in 3895 ms (DASH time 414012 ms)

  My MP4box command :

  MP4Box -dash-live 2000 -subdur 4000 -bound -segment-timeline -no-cache -profile dashavc264:live -subsegs-per-sidx -1 -mpd-refresh 4 -time-shift 16 -min-buffer 2000 -url-template -insert-utc -bs-switching no -run-for 86400000 -dash-ctx ../../live/log.txt -out ../../live/manifest.mpd ../current/output_1080.mp4:bandwidth=4800000#video ../current/output_720.mp4:bandwidth=2400000#video ../current/output_360.mp4:bandwidth=800000#video ../current/output_audio.mp4:bandwidth=384000#audio

  after 50% of the advertised duration an error will occur (probably)

  I say probably because the time for testing it is very long so may ask if the mp4box command provide for a stable loop or if the error will occur, and if yes, it will occur, may ask an help to debug my command line on mp4box to avoid this issue ?

  Im sorry but trial and error it’s too long since every try is about 24 hours..

  Dash.js web based purpose.

  Thansk in advance !