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• Android NDK & FFMPEG build

  22 mars 2017, par Android-Droid

  I’m trying to build FFMPEG library for my android application using the NDK. I have downloaded the source code from it’s website and I think I build it (it’s my first try working with NDK and ffmpeg). I have created a build.sh file which I’m using to execute it from command line on Mac OS X. But I have a few questions...

  First things is as I know I need Android.mk file so I can use the builded library in my application,but I don’t know how to do that for reasons which I told you above. After I run my build.sh I get android folder with a few folders and some libraries. So my first question is, how can I build the Android.mk file which I need...and maybe if someone can explain me why I need it.

  

  My second question is I need some libraries from ffmpeg to be able to use them from my app, but after the build i can’t see them in my source tree. I know that I have to enable them in my build.sh and I think I did,but I can’t see them. So any kind of information about my build file will be helpful for me to understand how to configure it.
  Here is how it looks like :

      #!/bin/bash
  
  ######################################################
  
  # Usage:
  
  # put this script in top of FFmpeg source tree
  
  # ./build_android
  
  # It generates binary for following architectures:
  
  # ARMv6 
  
  # ARMv6+VFP 
  
  # ARMv7+VFM-�d16 (Tegra2) 
  
  # ARMv7+Neon (Cortex-A8)
  
  # Customizing:
  
  # 1. Feel free to change ./configure parameters for more features
  
  # 2. To adapt other ARM variants
  
  # set $CPU and $OPTIMIZE_CFLAGS 
  
  # call build_one
  
  ######################################################
  
  NDK=~/Desktop/android-ndk-r5b
  
  PLATFORM=$NDK/platforms/android-8/arch-arm/
  
  PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/darwin-x86
  
  function build_one
  
  {
  
  ./configure \
  
      --target-os=darwin \
  
      --prefix=$PREFIX \
  
      --enable-cross-compile \
  
      --extra-libs="-lgcc" \
  
      --arch=arm \
  
      --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
  
      --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
  
      --nm=$PREBUILT/bin/arm-linux-androideabi-nm \
  
      --sysroot=$PLATFORM \
  
      --extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 $OPTIMIZE_CFLAGS " \
  
      --disable-doc \
  
      --disable-ffmpeg \
  
      --disable-ffplay \
  
      --disable-ffserver \
  
      --disable-ffprobe \
  
      --extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog" \
  
      --enable-zlib \
  
      --enable-version3 \
  
      --enable-nonfree \
  
      --enable-libmp3lame \
  
      --enable-libspeex \
  
      --enable-libtheora \
  
      --enable-libfaac \
  
      --enable-libvorbis \
  
      --enable-libaacplus \
  
      --prefix=$DIST_DIR \
  
      $ADDITIONAL_CONFIGURE_FLAG
  
  
  
  make clean
  
  make  -j4 install
  
  $PREBUILT/bin/arm-linux-androideabi-ar d libavcodec/libavcodec.a inverse.o
  
  $PREBUILT/bin/arm-linux-androideabi-ld -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib  -soname libffmpeg.so -shared -nostdlib  -z,noexecstack -Bsymbolic --whole-archive --no-undefined -o $PREFIX/libffmpeg.so libavcodec/libavcodec.a libavformat/libavformat.a libavutil/libavutil.a libswscale/libswscale.a -lc -lm -lz -ldl -llog  --warn-once  --dynamic-linker=/system/bin/linker $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/libgcc.a
  
  }
  
  
  
  #arm v6
  
  #CPU=armv6
  
  #OPTIMIZE_CFLAGS="-marm -march=$CPU"
  
  #PREFIX=./android/$CPU 
  
  #ADDITIONAL_CONFIGURE_FLAG=
  
  #build_one
  
  
  
  #arm v7vfpv3
  
  CPU=armv7-a
  
  OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU "
  
  PREFIX=./android/$CPU
  
  ADDITIONAL_CONFIGURE_FLAG=
  
  build_one
  
  
  
  #arm v7vfp
  
  #CPU=armv7-a
  
  #OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU "
  
  #PREFIX=./android/$CPU-vfp
  
  #ADDITIONAL_CONFIGURE_FLAG=
  
  #build_one
  
  
  
  #arm v7n
  
  #CPU=armv7-a
  
  #OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=neon -marm -march=$CPU -mtune=cortex-a8"
  
  #PREFIX=./android/$CPU 
  
  #ADDITIONAL_CONFIGURE_FLAG=--enable-neon
  
  #build_one
  
  
  
  #arm v6+vfp
  
  #CPU=armv6
  
  #OPTIMIZE_CFLAGS="-DCMP_HAVE_VFP -mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU"
  
  #PREFIX=./android/${CPU}_vfp 
  
  #ADDITIONAL_CONFIGURE_FLAG=
  
  #build_one

  Thanks for any kind of useful information/suggestions/examples and etc.

• Performance of ffmpeg decoding on android without neon support

  20 juillet 2012, par Android007

  I've compiled ffmpeg code on android and able to play the video without neon support and for armv5te. Decoding is good, the video plays,but the problem is the frame rate is really really bad. I getting a max of 5fps, which is horrible.

  Is there anybody who has got success in playing the video without support with ffmpeg on android. Or is there anything that I am really missing ?

  EDIT : configuration I got it by running

  ./configure --enable-gpl --enable-libgsm --enable-libxvid \
  
  --enable-libamr_nb --enable-libamr_wb --enable-libmp3lame --enable-libogg \
  
  --enable-libvorbis --enable-libfaac --enable-libfaad --enable-shared

• Using ffmpeg libraries in android native project

  23 juillet 2012, par SergeyD

  In my native android project I need to reduce a size of video file.

  I've already built ffmpeg libraries for android.

  How do I init ffmpeg libraries in my project and how to reduce video size without calling to ffmpeg in android command line.

  Thanks in advance !