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• How to change or modify pitch of audio file (music etc like .mp3 file)using FFMPEG ?

  18 octobre 2022, par syed kashifullah

  I want to change and modify pitch an .mp3 audio file using FFMPEG.
But I am unable to use FFMPEG to change or modify pitch of that sound.
what command (exact command) should be exactly use for changing pitch of an audio file ?

  


   String outPutPath = new File("/storage/emulated/0/Share it Application/Over_the_HorizonTemp.wav").getPath();
                 
                String[] strFfmpeg  = {"ffmpeg","-i" ,strInputPath,"-af", "rubberband=tempo=1.0:pitch=1.5:pitchq=quality" ,outPutPath};
                execffmpegBinary(strFfmpeg);


  


  execffmpegBinary Function :

  


  public void execffmpegBinary(String[] command) {
    Config.enableLogCallback(new LogCallback() {
        @Override
        public void apply(LogMessage message) {
            Log.e(Config.TAG, message.getText());
            Log.e("TAG", "apply: " +message.getText());
        }
    });
    Config.enableStatisticsCallback(new StatisticsCallback() {
        @Override
        public void apply(Statistics statistics) {

        }
    });

    long executionId = FFmpeg.executeAsync(command, new ExecuteCallback() {
        @Override
        public void apply(long executionId, int returnCode) {
            if (returnCode == RETURN_CODE_SUCCESS) {
                
                Log.e("1TAG", "apply:return code "+returnCode );
                Log.e("1TAG", "apply:execution Id "+executionId );
                Log.e("1TAG", "apply:execution Id "+ new FFmpegExecution(executionId,command));


            } else if (returnCode == RETURN_CODE_CANCEL) {
                Log.e("2TAG", "apply:return code "+returnCode );
                Log.e("2TAG", "apply:execution Id "+executionId );
                Log.e("2TAG", "apply:execution Id "+ new FFmpegExecution(executionId,command));

            } else {
                Log.e("3TAG", "apply: returnCode"+ returnCode);
                Log.e("3TAG", "apply:return code "+returnCode );
                Log.e("3TAG", "apply:execution Id "+executionId );
                Log.e("3TAG", "apply:execution Id "+ new FFmpegExecution(executionId,command));

            }
        }
    });
}


  


• What causes "double free or corruption" and "invalid pointer" in javacpp - ffmpeg ?

  7 septembre 2016, par Jiro Matchonson

  I use https://github.com/bytedeco/javacpp-presets/tree/master/ffmpeg

  <dependency>
  
        <groupid>org.bytedeco.javacpp-presets</groupid>
  
        <artifactid>ffmpeg</artifactid>
  
        <version>3.1.2-1.2</version>
  
  </dependency>

  When i am calling avformat_open_input/avformat_close_input i randomly (never at first call) get those errors :

   Error in `/usr/lib/jvm/java-8-oracle/bin/java': double free or corruption (out): 0x00007fe79c194aa0

  or

  Error in `/usr/lib/jvm/java-8-oracle/bin/java': double free or corruption (!prev): 0x00007fe51c3ffb60

  or

  Error in `/usr/lib/jvm/java-8-oracle/bin/java': double free or corruption (fasttop): 0x00007fcdc40fe4a0

  I cant find out how to solve this, please help.

  There is my implementation :

      private static void registerComponents() {
  
          if (!componentsRegistered) {
  
              componentsRegistered = true;
  
              av_register_all();
  
          }
  
      }
  
  
  
      public static void decodeFrame(ByteBuffer frameData) {
  
          registerComponents();
  
  
  
          AVFormatContext pFormatCtx = avformat_alloc_context();
  
          int i, videoStream;
  
          AVCodecContext pCodecCtx = null;
  
          AVCodec pCodec = null;
  
          AVFrame pFrame = null;
  
          AVFrame pFrameRGB = null;
  
  
  
          int[] frameFinished = new int[1];
  
          int numBytes;
  
          BytePointer buffer = null;
  
  
  
          AVDictionary    optionsDict = null;
  
          SwsContext      sws_ctx = null;
  
  
  
          AVIOContext ioContext = avio_alloc_context(new BytePointer(frameData), frameData.capacity(), 0, null, null, null, null);
  
          pFormatCtx.pb(ioContext);
  
  
  
          if (avformat_open_input(pFormatCtx, "", null, null) < 0) {
  
              logger.error(MarkerFactory.getMarker("ffmpeg"), "Problem with load video from memory.");
  
              return;
  
          }
  
  
  
         avformat_close_input(pFormatCtx);       
  
      }

• Revision 3643544fe0 : Merge "Reverting "Adds support for reading and writing 10/12-bit y4m" for now be

  3 juillet 2014, par Dmitry Kovalev

  Changed Paths :
   Modify /vpxdec.c

  
  
  Merge "Reverting "Adds support for reading and writing 10/12-bit y4m" for now
  because of Mac Build Failure."