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• Filename in android rejected by ffmpeg command

  28 avril 2020, par ark1974

  Planning to use ffmpeg in Android for A/V conversion. Installed Android Studio 3.5.3. I am fairly new to Android development and the folder names, unlike in windows system, is fairly confusing to me. I am able to build the gradle without any error but the fetched pathname is rejected by ffmpeg commandline.

  



  Questions :

  



  1) Resulting path_name shows both pathname and filename which is cool. Is the resulting path_name correct or expected ? However, ffmpeg raised error flag citing that directory/file do not exist corresponding to the resulting path_name.

  



  2) Inside android properties, the path starts with "Device storage/..." but Android Studio command starts with "/document/". Why I see this variation ?

  



  3) onActivityResult() do not work with @override private prefix but works with @override public, is it expected ? Many examples on internet, however use private though.

  



  4) MediaStore.Audio.Media.DATA code do not work at all, is it deprecated in Android 3.5.5 ?

  



  Java code :

  



  @Override public void onActivityResult(int requestCode, int resultCode, Intent data) {
        if(requestCode == 7 &&  resultCode == RESULT_OK){    
                    path_name = data.getData().getPath();    
        }
    }


  



  Result :

  



  path_name = "/document/primary:WhatsApp/Media/WhatsApp Audio/AUD-20200402-WA0006.mp3" **strong text**


  


• Use FFMPEG to blend streaming overlay onto second stream

  31 août 2017, par Louwrens Benade

  I’m trying to build a form of monitoring that can be superimposed onto a live stream.

  Monitor Overlay

  ffmpeg -i rtmp://localhost/pool/livestream -filter_complex \
  
    "nullsrc=1024x576[1:v]; \
  
    [0:a]showvolume=v=0:o=1:t=0:f=0.1,drawbox=x=ih-40:y=0:w=40:h=ih[volume]; \
  
    [1:v]drawtext=x=(main_w/2)-(text_w/2):y=text_h:fontsize=30:fontcolor=white:borderw=1:text='Stream Label',scale=-1:-1[label]; \
  
    [label][volume]overlay=x=main_w-40:y=0[output]" \
  
    -map "[output]" -f flv rtmp://localhost/pool/livestream_overlay

  What I would like to accomplish is that this stream be superimposed onto the original stream and pushed to a third RTMP endpoint, like this :

  ffmpeg -i rtmp://localhost/pool/livestream -i rtmp://localhost/pool/livestream_overlay \
  
    -filter_complex "[0:v][1:v]overlay=shortest=1[output]" \
  
    -f flv rtmp://localhost/pool/livestream_monitor

  While the workflow seems to be working, the overlay is not blending (subtracted ?) onto the original video :

  Actual output

  

  Expected output

  

  Note : codec options have been removed for brevity’s sake.

• Conflict between FFmpeg and Vitamio

  16 juin 2016, par Âu Mậu Dương

  I need your help.
  When I add vitamio library to my projet. it error out :

  error

  FATAL EXCEPTION : main Process : inetwork.tictictalk.chat, PID :
  24161
  java.lang.UnsatisfiedLinkError : org.bytedeco.javacpp.avutil
  at java.lang.Class.classForName(Native Method)
  at java.lang.Class.forName(Class.java:308)
  at org.bytedeco.javacpp.Loader.load(Loader.java:413)
  at org.bytedeco.javacpp.Loader.load(Loader.java:381)
  at org.bytedeco.javacpp.avcodec$AVPacket.(avcodec.java:1650)
  at org.bytedeco.javacv.FFmpegFrameRecorder.(FFmpegFrameRecorder.java:149)
  at com.uniprogy.streamini.streamingScreen.activities.StreamingActivityCV.initRecorder(StreamingActivityCV.java:280)
  at com.uniprogy.streamini.streamingScreen.activities.StreamingActivityCV.startRecording(StreamingActivityCV.java:305)
  at com.uniprogy.streamini.streamingScreen.activities.StreamingActivityCV.startStreaming(StreamingActivityCV.java:380)
  at com.uniprogy.streamini.streamingScreen.fragments.StreamingFragment.onActivityCreated(StreamingFragment.java:109)
  at android.support.v4.app.Fragment.performActivityCreated(Fragment.java:1983)
  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1092)
  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1252)

  at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:738)
  
  at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617)
  
  
  
   at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:517)
  
  
  
   at android.os.Handler.handleCallback(Handler.java:739) 
  
   at android.os.Handler.dispatchMessage(Handler.java:95)                                                                   
  
   at android.os.Looper.loop(Looper.java:145)
  
   at android.app.ActivityThread.main(ActivityThread.java:5951)
  
  at java.lang.reflect.Method.invoke(Native Method) 
  
   at java.lang.reflect.Method.invoke(Method.java:372) 
  
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
  
  
  
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)

  If I delete vitamio, my project work well.
  I use vitamio 4.0 : https://github.com/yixia/VitamioBundle