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• Piwik and Piwik PRO featured in VentureBeat Insight as “an obvious solution” for web analytics

  7 avril 2015, par Piwik Core Team — About

  We are proud to see Piwik and Piwik PRO featured in the recent report published by VentureBeat Insight. Published at the end of March 2015, Conversion Rate Optimisation : how to win at performance marketing was based on surveys of almost 3000 CRO tools users.

  

  Piwik earned a perfect score of 100 out of 100 for website analytics and was featured as an “obvious solution” for those who prefer to use open source products. The report also pointed out a very low abandonment rate of Piwik by its users, despite its growing popularity (3%).

  You can preview the “Conversion Rate Optimisation : how to win at performance marketing” report for free here
  (Note : there is a form to fill in before you can access it).

  View other awards won by Piwik here.

• Android NDK & FFMPEG : libffmpeg.so is not getting created

  20 février 2015, par Palak Darji

  I am using this to build ffmpeg on ndk :
  roman10’s android ndk r9d - ffmpeg tutorial

  I am able to run build_android.sh script. I am getting libavcodec-55.so and all that files under android folder. But I am not getting this : libffmpeg.so

  The link shows how to compile, but its not clear how to use it. Can anybody guide me ? Thanks.

  My build_android.sh

  #!/bin/bash
  
  
  
  NDK_PLATFORM_LEVEL=19
  
  NDK_COMPILER_VERSION=4.8
  
  
  
  # Android now has 64-bit and 32-bit versions of the NDK for GNU/Linux.  We
  
  # assume that the build platform uses the appropriate version, otherwise the
  
  # user building this will have to manually set NDK_PROCESSOR or NDK_TOOLCHAIN.
  
  if [ $(uname -m) = "x86_64" ]; then
  
      NDK_PROCESSOR=x86_64
  
  else
  
      NDK_PROCESSOR=x86
  
  fi
  
  
  
  NDK_UNAME=`uname -s | tr '[A-Z]' '[a-z]'`
  
  
  
  
  
  NDK=/home/palak/NDK/android-ndk-r10d
  
  
  
  function build_one
  
  {
  
      if [ $NDK_ABI = "x86" ]; then
  
          HOST=i686-linux-android
  
          NDK_TOOLCHAIN=$NDK_ABI-$NDK_COMPILER_VERSION
  
      echo hostx86=$HOST
  
      echo ndk_toolchain=$NDK_TOOLCHAIN
  
      else
  
          HOST=$NDK_ABI-linux-androideabi
  
          NDK_TOOLCHAIN=$HOST-$NDK_COMPILER_VERSION
  
      echo hostelse=$HOST
  
      echo ndk_toolchain=$NDK_TOOLCHAIN
  
      fi
  
  
  
      SYSROOT=$NDK/platforms/android-$NDK_PLATFORM_LEVEL/arch-$NDK_ABI/
  
      export SYSROOTNEW=$NDK/platforms/android-$NDK_PLATFORM_LEVEL/arch-$NDK_ABI
  
      TOOLCHAIN=$NDK/toolchains/$NDK_TOOLCHAIN/prebuilt/$NDK_UNAME-$NDK_PROCESSOR
  
      echo sysroot=$SYSROOT
  
      echo prefix=$PREFIX
  
      echo toolchain=$TOOLCHAIN
  
      echo ndk=$NDK
  
  
  
  make distclean > /dev/null 2>&1
  
  
  
  sudo ./configure \
  
      --prefix=$PREFIX \
  
      --enable-shared \
  
      --disable-debug \
  
      --enable-stripping \
  
      --enable-static \
  
      --disable-doc \
  
      --enable-ffmpeg \
  
      --disable-ffplay \
  
      --disable-ffprobe \
  
      --disable-ffserver \
  
      --disable-avdevice \
  
      --disable-doc \
  
      --disable-symver \
  
      --cross-prefix=$TOOLCHAIN/bin/$HOST- \
  
      --target-os=linux \
  
      --arch=arm \
  
      --enable-cross-compile \
  
      --sysroot=$SYSROOT \
  
      --enable-pic \
  
      --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
  
      --extra-ldflags="$ADDI_LDFLAGS" \
  
      $ADDITIONAL_CONFIGURE_FLAG
  
  make clean
  
  make -j16
  
  make install
  
  }
  
  
  
  CPU=arm
  
  PREFIX=$(pwd)/android/$CPU 
  
  ADDI_CFLAGS="-marm" 
  
  ADDITIONAL_CONFIGURE_FLAG="--cpu=cortex-a8"
  
  
  
  NDK_ABI=x86
  
  CPU=i686
  
  PREFIX=$(pwd)/android/x86
  
  ADDI_CFLAGS="-pipe -march=atom -msse3 -ffast-math -mfpmath=sse"
  
  ADDI_LDFLAGS="-lm -lz -Wl,--no-undefined -Wl,-z,noexecstack"
  
  ADDITIONAL_CONFIGURE_FLAG="--arch=x86 --cpu=i686"
  
  
  
  build_one

  I am using Ndk r10, ffmpeg 2.5.4, ubuntu x86.

  Edit : Android.mk

  LOCAL_PATH:= /home/palak/NDK/ffmpeg-2.5.4/android/arm
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE:= libavcodec
  
  LOCAL_SRC_FILES:= lib/libavcodec-56.so
  
  LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
  
  include $(PREBUILT_SHARED_LIBRARY)
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE:= libavformat
  
  LOCAL_SRC_FILES:= lib/libavformat-56.so
  
  LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
  
  include $(PREBUILT_SHARED_LIBRARY)
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE:= libswscale
  
  LOCAL_SRC_FILES:= lib/libswscale-3.so
  
  LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
  
  include $(PREBUILT_SHARED_LIBRARY)
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE:= libavutil
  
  LOCAL_SRC_FILES:= lib/libavutil-54.so
  
  LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
  
  include $(PREBUILT_SHARED_LIBRARY)
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE:= libavfilter
  
  LOCAL_SRC_FILES:= lib/libavfilter-5.so
  
  LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
  
  include $(PREBUILT_SHARED_LIBRARY)
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE:= libswresample
  
  LOCAL_SRC_FILES:= lib/libswresample-1.so
  
  LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
  
  include $(PREBUILT_SHARED_LIBRARY)

• ffmpeg ndk multiple definition libavcodec.a(golomb.o)

  4 décembre 2014, par WLGfx

  I’m trying to link ffmpeg as static libraries with android NDK but I’m getting ’multiple definition’ error’ errors as below. I’ve also included my build script which runs through everything just fine but when I come to using the libraries in Eclipse with the ADT plugin, I can’t get anywhere.

  From this it looks like it wants something to do with VLC. I don’t want anything to do with VLC, just ffmpeg for video streaming. Everything works fine with shared libraries, but I’m after a very tiny player because I’m restricted to space on the device.

  EDIT : Also ’log2_tab_tab.o’ has multiple definitions.

  error: jni/libs\libavcodec.a(golomb.o): multiple definition of 'ff_golomb_vlc_len'  Ffplayer            C/C++ Problem
  
  error: jni/libs\libavcodec.a(golomb.o): multiple definition of 'ff_interleaved_dirac_golomb_vlc_code'   Ffplayer            C/C++ Problem
  
  error: jni/libs\libavcodec.a(golomb.o): multiple definition of 'ff_interleaved_golomb_vlc_len'  Ffplayer            C/C++ Problem
  
  error: jni/libs\libavcodec.a(golomb.o): multiple definition of 'ff_interleaved_se_golomb_vlc_code'  Ffplayer            C/C++ Problem
  
  error: jni/libs\libavcodec.a(golomb.o): multiple definition of 'ff_interleaved_ue_golomb_vlc_code'  Ffplayer            C/C++ Problem
  
  error: jni/libs\libavcodec.a(golomb.o): multiple definition of 'ff_se_golomb_vlc_code'  Ffplayer            C/C++ Problem
  
  error: jni/libs\libavcodec.a(golomb.o): multiple definition of 'ff_ue_golomb_len'   Ffplayer            C/C++ Problem
  
  error: jni/libs\libavcodec.a(golomb.o): multiple definition of 'ff_ue_golomb_vlc_code'  Ffplayer            C/C++ Problem
  
  error: jni/libs\libavcodec.a(log2_tab.o): multiple definition of 'ff_log2_tab'  Ffplayer            C/C++ Problem
  
  error: jni/libs\libavformat.a(log2_tab.o): multiple definition of 'ff_log2_tab' Ffplayer            C/C++ Problem
  
  jni/libs\libavformat.a(golomb_tab.o): previous definition here  Ffplayer            C/C++ Problem
  
  jni/libs\libavutil.a(log2_tab.o): previous definition here  Ffplayer            C/C++ Problem
  
  make.exe: *** [obj/local/armeabi-v7a-hard/libffplayer.so] Error 1   Ffplayer            C/C++ Problem

  Using the latest branch of ffmpeg (2.4.3) my build script for Android (using toolchain 8 because it’s old hardware I’m working with) and wanting the NEON hardware support :

  export ANDROID_NDK=/home/carl/dev/ndk
  
  export TOOLCHAIN=/home/carl/temp/ffmpeg
  
  export SYSROOT=$TOOLCHAIN/sysroot/
  
  $ANDROID_NDK/build/tools/make-standalone-toolchain.sh \
  
      --platform=android-8 --install-dir=$TOOLCHAIN
  
  
  
  export PATH=$TOOLCHAIN/bin:$PATH
  
  export CC=arm-linux-androideabi-gcc
  
  export LD=arm-linux-androideabi-ld
  
  export AR=arm-linux-androideabi-ar
  
  
  
  CFLAGS="-O3 -Wall -mthumb -pipe -fpic -fasm \
  
    -finline-limit=300 -ffast-math \
  
    -fstrict-aliasing -Werror=strict-aliasing \
  
    -fmodulo-sched -fmodulo-sched-allow-regmoves \
  
    -Werror=implicit-function-declaration \
  
    -Wno-psabi -Wa,--noexecstack"
  
  #  -D__ARM_ARCH_5__ -D__ARM_ARCH_5E__ \
  
  #  -D__ARM_ARCH_5T__ -D__ARM_ARCH_5TE__ \
  
  #  -DANDROID -DNDEBUG"
  
  
  
  EXTRA_CFLAGS="-march=armv7-a -mfpu=neon \
  
                -mfloat-abi=softfp -mvectorize-with-neon-quad \
  
                -DHAVE_ISNAN -DHAVE_ISINF
  
                -std=c99"
  
  EXTRA_LDFLAGS="-Wl,--fix-cortex-a8"
  
  
  
  FFMPEG_FLAGS="--prefix=/home/dev/ffmpeg/build \
  
    --target-os=linux \
  
    --arch=arm \
  
    --enable-cross-compile \
  
    --cross-prefix=arm-linux-androideabi- \
  
    --enable-shared \
  
    --enable-static \
  
    --enable-small \
  
    --disable-symver \
  
    --disable-doc \
  
    --disable-ffplay \
  
    --disable-ffmpeg \
  
    --disable-ffprobe \
  
    --disable-ffserver \
  
    --disable-avdevice \
  
    --disable-avfilter \
  
    --disable-encoders  \
  
    --disable-muxers \
  
    --disable-demuxers \
  
    --disable-filters \
  
    --disable-devices \
  
    --disable-decoders \
  
    --enable-decoder=mjpeg \
  
    --enable-decoder=mp1 \
  
    --enable-decoder=mp2 \
  
    --enable-decoder=mp3 \
  
    --enable-decoder=mpeg1_vdpau \
  
    --enable-decoder=mpeg1video \
  
    --enable-decoder=mpeg2video \
  
    --enable-decoder=mpeg4 \
  
    --enable-decoder=mpeg4_vdpau \
  
    --enable-decoder=mpegvideo \
  
    --enable-decoder=mpeg_xvmc \
  
    --enable-decoder=h261 \
  
    --enable-decoder=h263 \
  
    --enable-decoder=h263i \
  
    --enable-decoder=h263p \
  
    --enable-hwaccel=h263_vaapi \
  
    --enable-hwaccel=h263_vdpau \
  
    --enable-hwaccel=mpeg1_vdpau \
  
    --enable-hwaccel=mpeg1_xvmc \
  
    --enable-hwaccel=mpeg2_dxva2 \
  
    --enable-hwaccel=mpeg2_vaapi \
  
    --enable-hwaccel=mpeg2_vdpau \
  
    --enable-hwaccel=mpeg2_xvmc \
  
    --enable-hwaccel=mpeg4_vaapi \
  
    --enable-hwaccel=mpeg4_vdpau \
  
    --enable-demuxer=aac \
  
    --enable-demuxer=ac3 \
  
    --enable-demuxer=h261 \
  
    --enable-demuxer=h263 \
  
    --enable-demuxer=pcm_s16be \
  
    --enable-demuxer=pcm_s16le \
  
    --enable-demuxer=pcm_s8 \
  
    --enable-demuxer=mpegps \
  
    --enable-demuxer=mpegts \
  
    --enable-demuxer=mpegtsraw \
  
    --enable-demuxer=mpegvideo \
  
    --enable-demuxer=rtp \
  
    --enable-demuxer=rtsp \
  
    --enable-parser=aac \
  
    --enable-parser=mpegvideo \
  
    --enable-parser=ac3 \
  
    --enable-parser=h261 \
  
    --enable-parser=h263 \
  
    --enable-parser=mjpeg \
  
    --enable-parser=mpeg4video \
  
    --enable-parser=mpegaudio \
  
    --enable-protocol=rtp \
  
    --enable-protocol=file \
  
    --enable-protocol=ftp \
  
    --enable-protocol=tcp \
  
    --enable-protocol=http \
  
    --enable-protocol=udp \
  
    --enable-protocol=pipe \
  
    --enable-protocol=unix \
  
    --enable-network \
  
    --disable-swscale  \
  
    --enable-asm \
  
    --enable-memalign-hack \
  
    --disable-golomb \
  
    --enable-stripping \
  
    --enable-pthreads \
  
    --disable-symver \
  
    --enable-version3"
  
  
  
  ./configure $FFMPEG_FLAGS --extra-cflags="$CFLAGS $EXTRA_CFLAGS" \
  
    --extra-ldflags="$EXTRA_LDFLAGS"
  
  
  
  make clean
  
  echo "Project now cleaned"
  
  make -j4
  
  
  
  echo "Stripping multiple references from libraries"
  
  arm-linux-androideabi-ar d libavcodec.a log2_tab.o
  
  arm-linux-androideabi-ar d libavutil.a log2_tab.o
  
  
  
  echo "Done..."

  And this is the Android.mk file which works fine.

  LOCAL_PATH := $(call my-dir)
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE    := avutil
  
  LOCAL_SRC_FILES := libs\libavutil.a
  
  include $(PREBUILT_STATIC_LIBRARY)
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE    := avformat
  
  LOCAL_SRC_FILES := libs\libavformat.a
  
  include $(PREBUILT_STATIC_LIBRARY)
  
  
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE    := avcodec
  
  LOCAL_SRC_FILES := libs\libavcodec.a
  
  include $(PREBUILT_STATIC_LIBRARY)
  
  
  
  include $(CLEAR_VARS)
  
  
  
  LOCAL_MODULE    := ffplayer
  
  LOCAL_SRC_FILES := ffplayer.cpp
  
  
  
  LOCAL_C_INCLUDES := C:\DEV\ffmpeg\
  
  
  
  LOCAL_LDLIBS    += -llog -ljnigraphics -lGLESv2 -ldl
  
  LOCAL_LDLIBS    += -lstdc++ -lc
  
  LOCAL_LDLIBS    += -lz -lm
  
  
  
  LOCAL_WHOLE_STATIC_LIBRARIES += libavutil libavformat libavcodec
  
  
  
  include $(BUILD_SHARED_LIBRARY)

  If anybody can spot what’s wrong with this it would be so appreciated.