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• My (FFMPEG issue ) RTMP server(freebsd) wont let me hear video when I play a huge file over the server itself :/

  19 avril 2021, par Engi Gang

  Hey my name is Alisha from Norway im trying to get my RTMP server working the thing is that it works just fine but I just cant stream over it with ffmpeg I can stream to it on OBS and it works fine, but I am trying to a website where people could watch old public domain movies from the 1950 some of the films are actually pretty big lol.... anyways I detailed bellow more

  


  rm -rf /mnt/hls/loool && ffmpeg -re -i "$file" -c:v libx264 -c:a aac -b:v 300k -b:a 95k -f flv -flvflags no_duration_filesize rtmp ://lambright.xyz:1935/live/loool

  


  any work around I literally cant play the audio :( I can only hear (my source file is an MKV and 3gb )

  


  Note I had a smaller mp4 file and it did played the audio, the video isnt even playable in chrome but on VLC it is, but only a small file worked fine... its fine when I stream from my pc, but whats the point I am trying to set up my vintage 1950 serverbox :') trying to build a nice website where users could watch neat and decent old movies that are public domain if you wonder :/

  


  Another note when I am trying to play it on my iphone safari browser it does actually play parts but audio is super corrupted like you hear the audio sometimes :((

  


  rtmp {
    server {
        listen 1935; # Listen on standard RTMP port
        chunk_size 4000;

        application live {
            allow play all;
            live on;
            record off;
            hls on;
            hls_nested on;
            hls_path /mnt/hls/;
            hls_fragment 2s;
        }
        
    }
}


  


• Can not get frames from youtube video using FFmpegMediaMetadataRetriever

  27 juin 2019, par Ahasan Ratul

  I have been trying to extract a frame from a youtube video using FFmpegMediaMetadataRetriever in my android studio project. whenever I use the youtube url inside setDataSource, the app crashes. I am totally new in android studio and haven’t worked with FFmpeg before. I would appreciate if anyone can help me out. Also, I am sorry if I have asked a really silly/easy question.

  import wseemann.media.FFmpegMediaMetadataRetriever;
  
  .....
  
  
  
  private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
  
      @Override
  
      public void onManagerConnected(int status) {
  
          switch (status) {
  
              case LoaderCallbackInterface.SUCCESS: {
  
                  Log.i(TAG, "OpenCV loaded successfully");
  
                  mOpenCvCameraView.enableView();
  
                  try {
  
                      initializeOpenCVDependencies();
  
                  } catch (IOException e) {
  
                      e.printStackTrace();
  
                  }
  
              }
  
              break;
  
              default: {
  
                  super.onManagerConnected(status);
  
              }
  
              break;
  
          }
  
      }
  
  };
  
  
  
  
  
  private void initializeOpenCVDependencies() throws IOException {
  
  
  
      tick =0;
  
     //extract frame at 2 second using FFmpegMediaMetadataRetriever
  
      FFmpegMediaMetadataRetriever mmr = new FFmpegMediaMetadataRetriever();
  
      mmr.setDataSource("https://youtu.be/f-ehTcWC6dc");
  
      Bitmap b = mmr.getFrameAtTime(2000000, FFmpegMediaMetadataRetriever.OPTION_CLOSEST);
  
      mmr.release();
  
  
  
      objMat = new MatOfPoint2f();
  
      sceneMat = new MatOfPoint2f();
  
      obj_corners = new Mat(4, 1, CvType.CV_32FC2);
  
      img = new Mat();
  
      img2 = new Mat();
  
  }

  in the build.gradle, I have added the following dependencies

  dependencies {
  
  
  
         //FFmpegMediaMetadataRetriever dependencies
  
         implementation 'com.github.wseemann:FFmpegMediaMetadataRetriever:1.0.14'
  
  
  
         implementation project(path: ':openCVLibrary340dev')
  
  }

  error that I get is :

  E/AndroidRuntime : FATAL EXCEPTION : main
  Process : com.example.jeverfun, PID : 8877
  java.lang.RuntimeException : Unable to resume activity com.example.jeverfun/com.example.jeverfun.jevercamera : java.lang.IllegalArgumentException : setDataSource failed : status = 0xFFFFFFFF
  at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3581)
  at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3621)
  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2862)
  at android.app.ActivityThread.-wrap11(Unknown Source:0)
  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
  at android.os.Handler.dispatchMessage(Handler.java:106)
  at android.os.Looper.loop(Looper.java:164)
  at android.app.ActivityThread.main(ActivityThread.java:6494)
  at java.lang.reflect.Method.invoke(Native Method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
  Caused by : java.lang.IllegalArgumentException : setDataSource failed : status = 0xFFFFFFFF
  at wseemann.media.FFmpegMediaMetadataRetriever.setDataSource(Native Method)
  at com.example.jeverfun.jevercamera.initializeOpenCVDependencies(jevercamera.java:373)
  at com.example.jeverfun.jevercamera.access$100(jevercamera.java:59)
  at com.example.jeverfun.jevercamera$1.onManagerConnected(jevercamera.java:347)
  at com.example.jeverfun.jevercamera.onResume(jevercamera.java:469)
  at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1355)
  at android.app.Activity.performResume(Activity.java:7117)
  at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3556)
  at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3621) 
  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2862) 
  at android.app.ActivityThread.-wrap11(Unknown Source:0) 
  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589) 
  at android.os.Handler.dispatchMessage(Handler.java:106) 
  at android.os.Looper.loop(Looper.java:164) 
  at android.app.ActivityThread.main(ActivityThread.java:6494) 
  at java.lang.reflect.Method.invoke(Native Method) 
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) 
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807) 
  I/MediaMetadataRetrieverJNI : release
  Application terminated.

• ffmpeg how to do the "earrape" sound effect

  20 avril 2020, par Shalin Shah

  I was wondering how to do the earrape effect using ffmpeg where the audio just sounds completely destroyed. Here's an example :
https://www.youtube.com/watch?v=KiCmvQiAC8Q

  



  I've tried a bunch of combinations of different commands on ffmpeg and the closest I've gotten is the following (where I use the superequalizer and then make the volume super high) :

  



  import ffmpeg
(
    ffmpeg
    .input('shark.wav')
    .filter("superequalizer", 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20)
    .filter("volume", 10)
    .output('output_earrape.wav')
    .run()
)


  



  I'm using a python wrapper but here's the command line equivalent :

  



  ffmpeg -i shark.wav -af "superequalizer=1b=20:2b=20:3b=20:4b=20:5b=20:6b=20:7b=20:8b=20:9b=20:10b=20:11b=20:12b=20:13b=20:14b=20:15b=20:16b=20:17b=20:18b=20,volume=10" output_earrape.wav


  



  The problem with the above is that it doesn't do anything for files that aren't already super loud (such as recorded audio) and most of the time the audio actually just ends up clipping and then being super soft.

  



  Does anyone have suggestions on how to do this effect ? Thanks !