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• Android - Decoding via a pipe will not work : Could not find an ffmpeg binary for your system

  28 août 2017, par Daniele

  I’m trying to use TarsosDSP for real time pitch shifting on Android.

  This is my code :

  Uri song;
  
  // initialized in another method
  
  
  
  double rate = 1.0;
  
          RateTransposer rateTransposer;
  
          AudioDispatcher dispatcher;
  
          WaveformSimilarityBasedOverlapAdd wsola;
  
  
  
          dispatcher = AudioDispatcherFactory.fromPipe(getRealPathFromUri(song), 44100, 5000, 2500);
  
          rateTransposer = new RateTransposer(rate);
  
          wsola = new WaveformSimilarityBasedOverlapAdd(WaveformSimilarityBasedOverlapAdd.Parameters
  
                  .musicDefaults(rate, 44100));
  
  
  
          wsola.setDispatcher(dispatcher);
  
          dispatcher.addAudioProcessor(wsola);
  
          dispatcher.addAudioProcessor(rateTransposer);
  
          dispatcher.addAudioProcessor(new AndroidAudioPlayer(dispatcher.getFormat()));
  
          dispatcher.setZeroPadFirstBuffer(true);
  
          dispatcher.setZeroPadLastBuffer(true);

  I get an error here

  dispatcher = AudioDispatcherFactory.fromPipe(getRealPathFromUri(song), 44100, 5000, 2500);

  Decoding via a pipe will not work : Could not find an ffmpeg binary for
  your system

  Why does this happen and how should I fix it ?

  EDIT :

  As far as I was able to understand it’s because ffmpeg isn’t integrated within the app. I looked for a guide here on SO but I couldn’t find any updated one. Using NDK r15c and FFmpeg 3.3.3

• Adding audio to an OpenCV video

  21 février 2019, par pcrunn

  I’m trying to make a script that automates the process of making a video and i’m stuck on the part that i add the audio, I’m not sure if i’ll need to use ffmpeg for that and if so, i’m not sure how to use it the proper way to work with OpenCV (Which I use for rendering the video).

  Thanks for your time, Here is my current code (that I found from a website)

  # Creating the video... The worst part. Literally
  
  
  
  width = 1920
  
  height = 1080
  
  FPS = 30
  
  length = 0
  
  
  
  for song in songs:
  
      length+=song.info.length
  
  
  
  length = int(length)
  
  
  
  fourcc = VideoWriter_fourcc(*'MP42')
  
  video = VideoWriter('result.avi', fourcc, float(FPS), (width, height))
  
  for _ in range(FPS*length):
  
      frame = np.random.randint(0, 256,
  
                                (height, width, 3),
  
                                dtype=np.uint8)
  
      video.write(frame)
  
  
  
  video.release()

• MAINTAINERS : add myself for tonemap_opencl

  13 février 2019, par Ruiling Song

  MAINTAINERS : add myself for tonemap_opencl
  Signed-off-by : Ruiling Song <ruiling.song@intel.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] MAINTAINERS