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• Android : AMR-NB support in javacv -> ffmpeg

  1er décembre 2013, par cyberpawn

  I am trying to use AMR_NB Codec in JavaCV Android but having problems :

  This is the code i run :

  avcodec.avcodec_register_all();
  
  avformat.av_register_all();
  
  AVCodec mCodec = avcodec.avcodec_find_encoder(avcodec.AV_CODEC_ID_AMR_NB);

  Output : The mCodec is null but if I pass avcodec.AV_CODEC_ID_AAC than mCodec is not null

  I am assuming that I have to recompile ffmpeg with —enable-libopencore-amrnb. So, I downloaded Android NDKr9+ffmpeg-2.0.2+last_stable_x264 and added them to javacv-cppjars folder, I have also installed opencore-amr library in /usr/local. In ffmpeg-2.0.2-android-arm.patch i added the —enable-libopencore-amrnb flag and run following command in terminal

  ANDROID_NDK=/Users/android-ndk-r9b/ FFMPEG_VERSION=2.0.2 ./build_ffmpeg-android-arm.sh

  The script runs but the libs are not generated and the jar is empty but if I remove the —enable-libopencore-amrnb flag back then the libs are generated successfully, Please advise what am I doing wrong ? What should I do ? Any help would be greatly appreciated !

  by the way, I am using mac-osx

  Thanks.

• How to stream a usb webcam to an android phone with ffmpeg and ffserver ?

  26 juillet 2015, par victor jung

  I am desperately trying to live stream the usb webcam from a linux computer to my android phone.
  I tried with ffmpeg and ffserver, to create the stream and with videoview in android to display it. I tried all the possible format/encoder/protocols possibilities but nothing worked. In most case I am able to open the stream in VLC in another PC, but I was never able to play on my phone. I always get this error :
  "can’t play this video"
  Here is my app code :

  package com.example.victor.videostream;
  
  import android.os.Bundle;
  
  import android.app.Activity;
  
  import android.view.View;
  
  import android.net.Uri;
  
  import android.widget.MediaController;
  
  import android.widget.VideoView;
  
  public class MainActivity extends Activity
  
   {
  
  VideoView videoView;
  
  @Override
  
   protected void onCreate(Bundle savedInstanceState)
  
  {
  
       super.onCreate(savedInstanceState);
  
       videoView = null;
  
       setContentView(R.layout.activity_main);
  
  
  
       videoView =(VideoView)findViewById(R.id.VideoView);
  
       MediaController mediaController= new MediaController(this);
  
       mediaController.setAnchorView(videoView);
  
  
  
   Uri uri = Uri.parse("http://host:port/mystream.3gp");
  
    videoView.setMediaController(mediaController);
  
    videoView.setVideoURI(uri);
  
    videoView.requestFocus();
  
    videoView.start();
  
         }
  
          }

  I read here

  about god encoding practice for android, but even with .3gp format encoded with mpeg4 as suggested it doesn’t work. Have any body once succeeded doing this ?
  I am also up to discover other possibilities to stream this webcam to my android if you have any ideas.
  this is the closest post I found but no solution...
  Hope somebody can help !
  thanks for reading.

• ffplay on Android

  3 mai 2016, par sravan953

  I’ve gone through this - http://writingminds.github.io/ffmpeg-android-java/
  I’ve gotten FFMpeg on Android, as in, my app is able to load the FFMPeg binary. However, ffplay commands do not work. Is it possible to port ffplay into my app ?