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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

• Unable to find a suitable output format for 'pipe :' - pipe: : Invalid argument

  14 août 2017, par Adam Gerard

  I’m working on a project to potentially simplify some of the process to send video to something like Facebook Live.

  Right now I’m using this example with a FB Live API RTMP endpoint (neither of these are production or real development commands - by using this example I think I can figure out the limitations of what I’m doing in others) :

  -i - -map 0 -c:v libx264 -c:a aac -muxrate 1000k -bufsize 2000k -g 50 -f tee "rtmp://rtmp-api.facebook.com:80/rtmp/10104590177564330?ds=1&s_e=4&s_l=1&a=ATgko8JiGpXC0WGf"

  Here’s the original example :

  $ ffmpeg -i input -map 0 -c:v libx264 -c:a aac -bufsize 2000k -g 50 -f tee \ "[f=flv:onfail=ignore]rtmp://facebook|[f=flv:onfail=ignore]r‌​tmp://youtube|local_‌​file.mkv"

  However, despite using that example I’m getting :

  [NULL @ 0xffd840] Unable to find a suitable output format for 'pipe:'<br />
pipe:: Invalid argument

  I understand that sometimes this error arises due to spacing issues or incorrect syntax. I’ve looked around to try to resolve this problem and using many combinations does not change the result.

  Thanks !

  Edit - Log added :

   configuration: --cc=emcc --prefix=/Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist --extra-cflags='-I/Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist/include -v' --enable-cross-compile --target-os=none --arch=x86_32 --cpu=generic --disable-ffplay --disable-ffprobe --disable-ffserver --disable-asm --disable-doc --disable-devices --disable-pthreads --disable-w32threads --disable-network --disable-hwaccels --disable-parsers --disable-bsfs --disable-debug --disable-protocols --disable-indevs --disable-outdevs --enable-protocol=file --enable-libvpx --enable-gpl --extra-libs='/Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist/lib/libx264.a /Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist/lib/libvpx.a'

  It specifically fails here :

  .../
  
  libavutil      52. 66.100 / 52. 66.100

• FFMpeg Playlist with pipe for streaming [on hold]

  24 juillet 2017, par sword1st

  I’m trying to find a solution for stream multiple files without any connection breaks. I found this answer from KKetch :

  I managed to stream a static playlist of videos by using for each video a pipe (ex vid1.mp4 -> pipe1, vid2.mp4 -> pipe2 etc). Then i write into a single stream named pipe "stream" this way cat pipe1 pipe2 pipe3 > stream, and i use the stream pipe as input in FFMPEG to publish my stream.

  (I’m using windows. I don’t know to use named pipes. I searched a lot but i couldn’t do it. I can do it with vb.net if it’s possible. But i don’t know how :/ Sorry for my bad english)

  But i can’t reply his message cuz i don’t have enough reputation. I hope someone can help me how can i use pipes for input like playlist. Thanks !