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• Call ffmpeg command from matlab (ubuntu 12.04)

  30 novembre 2014, par bigpig245

  I’m trying to call ffmpeg function to get duration of video from matlab. In command line, it returns ok :

  ntrang@ubuntu:~$ ffmpeg -i /home/ntrang/projects/dataset/hmdb51/01_test/a1.avi 2>&1 | sed -n "s/.*Duration: \([^,]*\), .*/\1/p"

  it returns 00:00:18.03

  But when I call it from matlab by system command :

  >> system('ffmpeg -i /home/ntrang/projects/dataset/hmdb51/01_test/a1.avi 2>&1 | sed -n "s/.*Duration: \([^,]*\), .*/\1/p"');

  it returns empty.

  This is my env setting in Matlab

  LD_LIBRARY_PATH='/usr/local/MATLAB/R2013a/sys/os/glnxa64:/usr/local/MATLAB/R2013a/bin/glnxa64:/usr/local/MATLAB/R2013a/extern/lib/glnxa64:/usr/local/MATLAB/R2013a/runtime/glnxa64:/usr/local/MATLAB/R2013a/sys/java/jre/glnxa64/jre/lib/amd64/native_threads:/usr/local/MATLAB/R2013a/sys/java/jre/glnxa64/jre/lib/amd64/server:/usr/local/MATLAB/R2013a/sys/java/jre/glnxa64/jre/lib/amd64'
  
  
  
  PATH='/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/lib/jvm/jdk1.7.0_51/bin'

  I also create symbolic link for libstdc but it can help nothing...

  I have looking around on Internet for solution but not so good so far... What should I do ?

  I’m using Matlab R2013a on Ubuntu 12.04.5 LTS 64bit...

  Thanks in advance.

• Linux - FFMpeg - Cannot open libmp3lame.so.0

  15 novembre 2014, par h4ng4r18

  I have installed FFMpeg to /bin/ffmpeg. When I try to run ffmpeg :

  ...bin]$ ffmpeg
  
  ffmpeg: error while loading shared libraries: libmp3lame.so.0: cannot open shared object file:
  
  No such file or directory

  however I can see this file

  bin]$ cd /usr/lib
  
  
  
  lib]$ dir
  
  cups        java-1.8.0        libavdevice.so.52      modprobe.d
  
  games       java-ext          libavdevice.so.52.2.3  python2.6
  
  gcc     jvm           libavformat.so.50      rpm
  
  java        jvm-commmon       libavformat.so.51      sendmail
  
  java-1.5.0  jvm-exports       libavutil.so.49        sendmail.sendmail
  
  java-1.6.0  jvm-private       libmp3lame.so.0        tmpfiles.d
  
  java-1.7.0  libavcodec.so.51  locale             yum-plugins

  I’m unsure of how to proceed at this stage - still quite new to Linux.

  The guide that I followed to get to this stage

  I am at the Symlinks stage and when I run

  sudo ln -s /usr/local/lib/libmp3lame.so.0 /usr/lib/libmp3lame.so.0

  I get "ln : failed to create symbolic link ‘/usr/lib/libmp3lame.so.0’ : File exists"

• Can I Config FFMEG-2.4.3 to use in android windows 64 ?

  13 novembre 2014, par Ngo Ky

  I want to build ffmpeg-2.4.3 (lastest c lib) to use it on android for managing video.
  my OS is windows 7 Utimate x64
  cywin64 in directory : C :/cywin64/ have make installed.
  NDK in directory : D :\solfware\Programming\android-ndk-r10c

  i follow toturial form : http://www.roman10.net/how-to-build-ffmpeg-for-android/comment-page-1/
  my project struture like :

  

  i create build_android.sh like roman10 as following code :

  # 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=D:\solfware\Programming\android-ndk-r10c
  
  PLATFORM=$NDK/platforms/android-8/arch-arm/
  
  PREBUILT=$NDK/prebuilt/windows-x86_64
  
  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

  i have set my path like above
  I built it in Eclipse Everything is ok. but when i ran it in Android it crashed Unfortunately.
  I found the errors in Logcat monitor :

  E/AndroidRuntime(1931) : java.lang.UnsatisfiedLinkError : Couldn’t load avcodec-55 from loader dalvik.system.PathClassLoader[DexPathList [1]] : findLibrary returned null

  E/AndroidRuntime(1931) : at java.lang.Runtime.loadLibrary(Runtime.java:358)

  In my activity i just call add Library from C preference like :

  static {
  
          //System.loadLibrary("avutil-52");
  
          System.loadLibrary("avcodec-55");
  
          System.loadLibrary("avformat-55");
  
          System.loadLibrary("swscale-2");
  
          System.loadLibrary("tutorial02");
  
      }

  i check in DDMS in app-lib there is no existing Library in there.

  The question is : Can i can compile the ffmpeg on windows ?
  if ok. how can i config build_android.sh to point to Android $PREBUILT

  PLATFORM=$NDK/platforms/android-8/arch-arm/
  
      PREBUILT=$NDK/prebuilt/windows-x86_64
  
      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 \

  i found that in $NDK/prebuilt/windows-x86_64/bin did not exist arm-linux-androideabi-gcc\
  How can i config to be suitable to run on windows ?

  Thank in advanced