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• Android ndk r7, ffmpeg on Windows

  10 janvier 2013, par Malaiselvan

  We are developing an android App which should convert the .3GP file to .FLV and upload to the web server.

  We completed the overall framework to upload a file to web server. But we are facing problem on converting the .3GP to .FLV.

  We searched google and couldn't able to find a working solution.

  1. We are using Windows OS
  2. We managed to install the NDK r7
  3. We managed to install cygwin.
  4. We downloaded the latest ffmpeg

  Now we need to compile the FFMPEG using the android NDK and use FFMPEG to convert the video file.

  Could someone help me to compile ffmpeg on android (windows) ?
  Or is there any other way simplest way to convert a video ?

• 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.