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• arm-linux-androideabi-gcc is unable to create an executable - compile ffmpeg for android armeabi devices

  25 juillet 2013, par Chaitanya Chandurkar

  I am trying to compile ffmpeg for android armeabi devices.
  I am following tutorial by roman10.net
  His given build script builds ffmpeg for armv7-a devices. I want to build it for armeabi.
  

  My ultimate aim is to run ffmpeg commands on android armeabi and armv7-a devices.

  So i change the script's CPU part from

  #arm v7vfpv3
  
  CPU=armv7-a
  
  OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU "
  
  PREFIX=./android/$CPU
  
  ADDITIONAL_CONFIGURE_FLAG=
  
  build_one 

  to

  #arm v6
  
  CPU=armv6
  
  OPTIMIZE_CFLAGS="-marm -march=$CPU"
  
  PREFIX=./android/$CPU 
  
  ADDITIONAL_CONFIGURE_FLAG=
  
  build_one

  (I thought changing it to armv6 would build ffmpeg compatible with armeabi devices. m i wrong ?)

  Doubt 1 :
  Do i also have to change toolchain ?
  i.e from arm-linux-androideabi-4.4.3 to arm-eabi-4.4.0 ?????

  Doubt 2 :

  When i try running ./build.sh (without changing toolchain) it gives me following error :
  

  /home/chaitanya/android/android-ndk-r5b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc is unable to create an executable file.
  
  C compiler test failed.
  
  
  
  If you think configure made a mistake,.. blaah blahh blaah

  after that i got lot of warnings saying :
  ‘sub_id’ is deprecated and many other function deprecated warnings.

  platform : ubuntu 11.10
  ffmpeg version : 0.11.2
  NDK : android-ndk-r5b

  Here is my build script :

  #!/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-ïd16 (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=~/android/android-ndk-r5b
  
  PLATFORM=$NDK/platforms/android-8/arch-arm/
  
  PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86
  
  function build_one
  
  {
  
  ./configure --target-os=linux \
  
      --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-shared \
  
      --enable-static \
  
      --extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog" \
  
      --disable-everything \
  
      --enable-demuxer=mov \
  
      --enable-demuxer=h264 \
  
      --disable-ffplay \
  
      --enable-protocol=file \
  
      --enable-avformat \
  
      --enable-avcodec \
  
      --enable-decoder=rawvideo \
  
      --enable-decoder=mjpeg \
  
      --enable-decoder=h263 \
  
      --enable-decoder=mpeg4 \
  
      --enable-decoder=h264 \
  
      --enable-parser=h264 \
  
      --disable-network \
  
      --enable-zlib \
  
      --disable-avfilter \
  
      --disable-avdevice \
  
      $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

  How do i tackle this problem ? what is going wrong ?

• implemention video filter through FFMpeg in Android

  2 octobre 2012, par Deepanjan Das

  I have a video file and am trying to scale it using -vf argument for ffmpeg "Angel" repo version used in an android project.
  The build through NDK is going smooth, but when I write this code, the application starts and exits. If I use any other argument other than -vf it works fine and export the video.

  JNIEXPORT jint JNICALL Java_com_schemaphic_mirrorapp_jni_NativeHelper_hFlipVideoEffect( JNIEnv *env, jstring outFile )
  
  {
  
  //ffplay -i INPUT -vf "crop=iw/2:ih:0:0,split[tmp],pad=2*iw[left]; [tmp]hflip[right]; [left][right] overlay=W/2"
  
  //fmpeg -i input -vf scale=iw/2:-1 output
  
  //ffmpeg -i input -vf yadif=0:0:0,scale=iw/2:-1  output
  
  
  
  char** arguments;
  
  int count = 6;
  
  
  
  arguments = calloc( count, sizeof( char* ) );
  
  
  
  arguments[0] = "ffmpeg";
  
  
  
  arguments[1] = "-i";
  
  arguments[2] = "/sdcard/mirrorapp/cropVideo.mp4";
  
  
  
  arguments[3] = "-vf";
  
  arguments[4] = "scale=120:-1";
  
  
  
  //arguments[5] = "-aspect";
  
  //arguments[6] = "3:2";
  
  //arguments[5] = "-vcodec";
  
  //arguments[6] = "mpeg4";
  
  /*arguments[9] = "-r";
  
  arguments[10] = "19";
  
  arguments[5] = "-cropright";
  
  arguments[6] = "240";
  
  arguments[7] = "-padleft";
  
  arguments[8] = "0";
  
  arguments[9] = "-padtop";
  
  arguments[10] = "0";
  
  arguments[11] = "-aspect";
  
  arguments[12] = "3:2";
  
  arguments[13] = "-an";
  
  arguments[5] = "-vcodec";
  
  arguments[6] = "mpeg4";*/
  
  //arguments[7] = "-sameq";
  
  arguments[5] = "/sdcard/mirrorapp/cropFlipVideo.mp4";
  
  
  
  ffmpeg_main( count, arguments );
  
  //free(arguments);
  
  
  
  return 1;
  
  }

  This gives me an impression that the set up is correct. the argument -vf is somehow not working or am not sure of the newer syntax. Kindly help.

• Multiple call to ffmpeg main fails in Android

  27 mars 2016, par fatih orhan

  I have ported ffmpeg library to Android. Using JNI interface, I am able to run ffmpeg commands by giving arguments to ffmpeg’s main method, just like from command line.

  In order to get a specific part of a video, I use this command :

  ffmpeg -i /mnt/sdcard/input_video.mp4 -ss 00:00:12 -t 00:00:10 -an /mnt/sdcard/output_video.mp4

  and it works great. The video is split from 12. seconds to 22. seconds and the video is saved, the method returns normally (as 0).

  However, if I make a second similar call (different start time for example) just after the first one is completed, ffmpeg is not able to process the request and it throws a segmentation fault.

  For the first call, it gives such an info :

  Guessed Channel Layout for Input Stream #0.0 : mono

  and works. But for the second, the message is like this one :

  Guessed Channel Layout for Input Stream #1.0 : mono

  and it doesn’t work. I don’t know if it has something to do with the error.

  The problem, in general, should be related to static global variables (I think) but I could not manage to reset them properly. What might be the solution to make multiple successful calls to the main method of ffmpeg ?