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• Build FFMPEG 3.1.4 for Android

  20 octobre 2016, par Vladimir Kulyk

  I used this and this methods to build latest (3.1.4) FFMPEG version for Android.
  Build was succeed.
  I got several folders with sources / headers / .o files.
  But unfortunately there are no .so files I need.
  Are there some updated script for building latest FFMPEG for android ?
  Or, how to convert .o and other files to .so ?

• mix two audio files fmpeg Android

  21 mars 2016, par Adroid Freak

  I’m using ffmpeg for android and I’m trying to mix two audio files but I’m getting the following error

   [NULL @ 0xb60c8c00] Unable to find a suitable output format for ' -filter_complex amerge -c:a libmp3lame -q:a 4 '
  
  -filter_complex amerge -c:a libmp3lame -q:a 4 : Invalid argument

  This is the ffmpeg library details when

  ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers
  
  built on Dec 22 2014 21:35:30 with gcc 4.8 (GCC)
  
  configuration: --target-os=linux --cross-prefix=/home/android/Downloads/ffmpeg-android-pie/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/android/Downloads/ffmpeg-android-pie/toolchain-android/sysroot --enable-decoders --enable-encoders --enable-filters --disable-indevs --enable-indev=lavfi --disable-outdevs --enable-hwaccels --enable-ffmpeg --enable-pic --enable-libx264 --enable-version3 --disable-debug --disable-ffserver --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/android/Downloads/ffmpeg-android-pie/ffmpeg-pkg-config --prefix=/home/android/Downloads/ffmpeg-android-pie/build/armeabi-v7a --extra-cflags='-I/home/android/Downloads/ffmpeg-android-pie/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/android/Downloads/ffmpeg-android-pie/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
  libavutil      54.  7.100 / 54.  7.100
  
  libavcodec     56.  1.100 / 56.  1.100
  
  libavformat    56.  4.101 / 56.  4.101
  
  libavdevice    56.  0.100 / 56.  0.100
  
  libavfilter     5.  1.100 /  5.  1.100
  
  libswscale      3.  0.100 /  3.  0.100
  
  libswresample   1.  1.100 /  1.  1.100
  
  libpostproc    53.  0.100 / 53.  0.100

  My function is this

  public Clip mixTwoAudioFiles (String audio1, String audio2, Clip out, ShellCallback sc) throws Exception
  
  {
  
      ArrayList<string> cmd = new ArrayList<string>();
  
  
  
      cmd.add(mFfmpegBin);
  
      cmd.add("-y");
  
  
  
      cmd.add("-i");
  
      cmd.add(audio1);
  
  
  
      cmd.add("-i");
  
      cmd.add(audio2);
  
  //  cmd.add("-strict");
  
  //  cmd.add("-2");//experimental
  
  
  
      cmd.add(" -filter_complex amerge -c:a libmp3lame -q:a 4 ");   
  
      File fileOut = new File(out.path);
  
      cmd.add(fileOut.getCanonicalPath());    
  
      execFFMPEG(cmd, sc); 
  
      return out;
  
  
  
  }
  
  </string></string>

  and the output command is this

  ffmpeg -y -i /storage/emulated/0/audio1.mp3 -i /storage/emulated/0/audio2.3gp -strict -2  -filter_complex amerge -c:a libmp3lame -q:a 4  /storage/emulated/0/out.mp4 

  Now as you can see above I don’t have libmp3lame enabled but it looks like the error above is not related to that, correct ?

  I tried many other filter variations but all are failing with the same error, the questions I have are as follow :

  1- Since I don't have libmp3lame, what is the next option? please note that mp3 is not mandatory here.
  
  2- If it is possible can you please show me how?

• Looking for Sox (Sound eXchange) libs port for android

  5 octobre 2016, par azure313

  I’m new to mobile development, and i’m developing a mobile application with sound effect functions.
  I find out that Sox (Sound eXchange) is very strong in desktop environment, and very easy to use, but it didn’t have any libs Port for Android.

  Does anyone know how to port SoX to Android or is there any other libs instead ?

  I already try ffmpeg, but it didn’t have Reverb effect, so i switch to SoX.

  Thank.