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• how can I take audio file(mp3) and video file(mp4) as input in Java spring ?

  29 juillet 2022, par Jawad Un Islam Abir

  I am using this code to read the audio file. but don't know how to take user input.

  


  InputStream inputStream = new FileInputStream("example.ogg");
FFmpegInput input = new FFmpegInput(inputStream);
FFmpegSourceStream stream = input.open(inputFormat);

stream.registerStreams();

AudioSourceSubstream audioSourceSubstream = null;
for(MediaSourceSubstream substream : stream.getSubstreams()) {
    if (substream.getMediaType() != MediaType.AUDIO) continue;

    audioSourceSubstream = (AudioSourceSubstream) substream;
}

if (audioSourceSubstream == null) throw new NullPointerException();


  


• I want to convert relay server nodejs http->websocket code version to java netty to spring-websocket

  20 août 2019, par rura6502

  I want to rewrite this example(https://github.com/phoboslab/jsmpeg/blob/master/websocket-relay.js) to java using netty and spring-WebSocket.

  This nodejs example’s HTTP server get the media data from FFmpeg and relay to the WebSocket. And then javascript library draws on the HTML Canvas.

  But My problem is that when I use netty, spring-WebSocket, some data cannot read by the javascript library and there are many data loss.

  In the example, this nodejs code’s main part I think.

  http = require('http'),
  
  WebSocket = require('ws');
  
  // setting websocket server ..............
  
  var streamServer = http.createServer( function(request, response) {
  
    // ....................
  
      response.connection.setTimeout(0);
  
      request.on('data', function(data){
  
          socketServer.broadcast(data);
  
              // .....
  
      });
  
    // .................
  
  }).listen(STREAM_PORT);

  So I already tried to change this. I just used netty code in the official document(https://netty.io/wiki/user-guide-for-4.x.html) and changed sending a part for the Websocket

  // this code is in channelRead method
  
  ByteBuf buf = (ByteBuf) msg;
  
  try {
  
    while (buf.isReadable()) { // (1)
  
      byte[] bytes = new byte[buf.readableBytes()];
  
      buf.readBytes(bytes);
  
      WSHandler.wsSessions.stream().forEach(wsSession -> {
  
        try {
  
          wsSession.sendMessage(new BinaryMessage(bytes));
  
        } catch (IOException e) {
  
          e.printStackTrace();
  
        };  
  
      });
  
    }
  
  } finally {
  
    ReferenceCountUtil.release(msg); // (2)
  
  }

  Please tell me what I missed. help me. thanks.

• how to Extract Audio from video with spring boot java in linux or windows system with ffmpeg coding part need guidance

  2 décembre 2022, par Makarand Burud

  I got this command but don't know the how to configure it for project on command line ?

  


  String[] command = "-y", "-i", filename, "-vn",
"-ar", "44100", "-ac", "2", "-b:a", "256k", "-f", "mp3" + fileStorageLocation ;