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• android_build.sh gives error while building ffmpeg library

  25 février 2016, par user3269550

  i am trying to build ffmpeg library my android_build.sh is given below

    #!/bin/bash
  
     NDK=C:/Users/Benzatine/Downloads/android-ndk-r10e
  
     SYSROOT=$NDK/platforms/android-18/arch-arm/
  
     TOOLCHAIN=$NDK/toolchains//arm-linux-androideabi-4.8/prebuilt/windows-x86_64
  
     function build_one
  
     {
  
       ./configure \
  
       --arch=arm \
  
        --target-os=linux \
  
  --enable-runtime-cpudetect \
  
  --enable-pic \
  
  --disable-shared \
  
  --enable-static \
  
  --extra-cflags='-march=armv6' \
  
  --extra-ldflags="$ADDI_LDFLAGS" \
  
  --enable-ffmpeg \
  
  --disable-ffplay \
  
  --disable-ffprobe \
  
  --disable-ffserver\
  
  --disable-network \
  
  --enable-cross-compile \
  
  --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  
  --sysroot=$SYSROOT \
  
  $ADDITIONAL_CONFIGURE_FLAG
  
  make clean
  
  make -j4
  
   make install
  
   }
  
  CPU=arm
  
  PREFIX=$(pwd)/android/$CPU 
  
   ADDI_CFLAGS="-marm"
  
   build_one

  but when i try to execute it always gives error

  error is

      /android_build.sh: line 5: syntax error near unexpected token `$'\r''
  
      /android_build.sh: line 5: `function build_one()

  I am new in this so please any one can help me to resolve this issue

• ffmpeg : Dynamically set output duration based on sliding text width

  18 janvier 2016, par John Whiteman

  I need to create a smooth ’news ticker’ on a low powered android device. Unfortunately this is impossible at runtime using HTML or native code as there is always some stutter or glitch.

  I’ve created a solution that gives me a smooth result by encoding an mp4 for each message and displaying one video after the other. This is the code I’m using :

  ffmpeg -f lavfi -i color=c=black:s=1280x100 -vf "drawtext=BebasNeue.otf:fontsize=60:fontcolor=white:y=h-line_h-30:x=-(4*n)+1280:text='Hello world'" -t 10 output.mp4

  Problem :
  I need to set the video’s duration dynamically so that the video stops when the text has completed it’s journey from right to left. The messages will be of varying lengths and I need each message to scroll at a constant speed (ie. an mp4 with a longer message would have a longer duration).

  Is this possible via an expression ? If not is there some clever way I can calculate this outside of ffmpeg and pass it to the ’-t’ (duration) parameter ?

  ** Edit **
  To calculate outside of ffmpeg I can do a calculation like video_width + text_width / video_fps (ie. 1280 + 262 / 25) to give me the duration. So now I’m just looking to see if this is possible within the ffmpeg command line itself. t

  Many thanks

• How to enable X264 with thread for Android on Mac OS X ?

  3 janvier 2016, par Jerikc XIONG

  I use the following script to compile x264 :

  #!/bin/bash
  
  # Based on https://github.com/yixia/x264/blob/master/build_android.sh
  
  
  
  if [ -z "$ANDROID_NDK" ]; then
  
      echo "You must define ANDROID_NDK before starting."
  
      echo "They must point to your NDK directories.\n"
  
      exit 1
  
  fi
  
  
  
  # Detect OS
  
  OS=`uname`
  
  HOST_ARCH=`uname -m`
  
  export CCACHE=; type ccache >/dev/null 2>&1 && export CCACHE=ccache
  
  if [ $OS == 'Linux' ]; then
  
      export HOST_SYSTEM=linux-$HOST_ARCH
  
  elif [ $OS == 'Darwin' ]; then
  
      export HOST_SYSTEM=darwin-$HOST_ARCH
  
  fi
  
  
  
  
  
  SOURCE=`pwd`
  
  PREFIX=$SOURCE/build/android
  
  
  
  SYSROOT=$ANDROID_NDK/platforms/android-12/arch-arm
  
  CROSS_PREFIX=$ANDROID_NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/$HOST_SYSTEM/bin/arm-linux-androideabi-
  
  EXTRA_CFLAGS="-march=armv7-a -mfloat-abi=softfp -mfpu=neon -D__ARM_ARCH_7__ -D__ARM_ARCH_7A__"
  
  EXTRA_LDFLAGS="-nostdlib"
  
  
  
  ./configure  --prefix=$PREFIX \
  
      --cross-prefix=$CROSS_PREFIX \
  
      --extra-cflags="$EXTRA_CFLAGS" \
  
      --extra-ldflags="$EXTRA_LDFLAGS" \
  
      --enable-pic \
  
      --enable-static \
  
      --enable-strip \
  
      --disable-cli \
  
      --host=arm-linux \
  
      --sysroot=$SYSROOT
  
  
  
  make clean
  
  make STRIP= -j4 install || exit 1

  After i add ’-lpthread’ , i got the following compile error :

  $ sh build_android.sh 
  
  No working C compiler found.
  
  Makefile:3: config.mak: No such file or directory
  
  ./configure
  
  platform:      X86_64
  
  byte order:    little-endian
  
  system:        MACOSX
  
  cli:           yes
  
  libx264:       internal
  
  shared:        no
  
  static:        no
  
  asm:           yes
  
  interlaced:    yes
  
  avs:           avxsynth
  
  lavf:          no
  
  ffms:          no
  
  mp4:           no
  
  gpl:           yes
  
  thread:        posix
  
  opencl:        yes
  
  filters:       crop select_every 
  
  debug:         no
  
  gprof:         no
  
  strip:         no
  
  PIC:           no
  
  bit depth:     8
  
  chroma format: all
  
  
  
  You can run 'make' or 'make fprofiled' now.
  
  dependency file generation...
  
  clang: error: no such file or directory: '/common/mc.c'
  
  clang: error: no such file or directory: '/common/predict.c'
  
  clang: error: no such file or directory: '/common/pixel.c'
  
  clang: error: no such file or directory: '/common/macroblock.c'
  
  clang: error: no such file or directory: '/common/frame.c'
  
  clang: error: no such file or directory: '/common/dct.c'
  
  clang: error: no such file or directory: '/common/cpu.c'
  
  clang: error: no such file or directory: '/common/cabac.c'
  
  clang: error: no such file or directory: '/common/common.c'
  
  clang: error: no such file or directory: '/common/osdep.c'
  
  clang: error: no such file or directory: '/common/rectangle.c'
  
  clang: error: no such file or directory: '/common/set.c'
  
  clang: error: no such file or directory: '/common/quant.c'
  
  clang: error: no such file or directory: '/common/deblock.c'
  
  clang: error: no such file or directory: '/common/vlc.c'
  
  clang: error: no such file or directory: '/common/mvpred.c'
  
  clang: error: no such file or directory: '/common/bitstream.c'
  
  clang: error: no such file or directory: '/encoder/analyse.c'
  
  clang: error: no such file or directory: '/encoder/me.c'
  
  clang: error: no such file or directory: '/encoder/ratecontrol.c'
  
  clang: error: no such file or directory: '/encoder/set.c'
  
  clang: error: no such file or directory: '/encoder/macroblock.c'
  
  clang: error: no such file or directory: '/encoder/cabac.c'
  
  clang: error: no such file or directory: '/encoder/cavlc.c'
  
  clang: error: no such file or directory: '/encoder/encoder.c'
  
  clang: error: no such file or directory: '/encoder/lookahead.c'
  
  clang: error: no such file or directory: '/x264.c'
  
  clang: error: no such file or directory: 'x264.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/input/input.c'
  
  clang: error: no such file or directory: 'input/input.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/input/timecode.c'
  
  clang: error: no such file or directory: 'input/timecode.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/input/raw.c'
  
  clang: error: no such file or directory: 'input/raw.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/input/y4m.c'
  
  clang: error: no such file or directory: 'input/y4m.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/output/raw.c'
  
  clang: error: no such file or directory: 'output/raw.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/output/matroska.c'
  
  clang: error: no such file or directory: 'output/matroska.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/output/matroska_ebml.c'
  
  clang: error: no such file or directory: 'output/matroska_ebml.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/output/flv.c'
  
  clang: error: no such file or directory: 'output/flv.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/output/flv_bytestream.c'
  
  clang: error: no such file or directory: 'output/flv_bytestream.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/filters/filters.c'
  
  clang: error: no such file or directory: 'filters/filters.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/filters/video/video.c'
  
  clang: error: no such file or directory: 'filters/video/video.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/filters/video/source.c'
  
  clang: error: no such file or directory: 'filters/video/source.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/filters/video/internal.c'
  
  clang: error: no such file or directory: 'filters/video/internal.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/filters/video/resize.c'
  
  clang: error: no such file or directory: 'filters/video/resize.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/filters/video/cache.c'
  
  clang: error: no such file or directory: 'filters/video/cache.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/filters/video/fix_vfr_pts.c'
  
  clang: error: no such file or directory: 'filters/video/fix_vfr_pts.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/filters/video/select_every.c'
  
  clang: error: no such file or directory: 'filters/video/select_every.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/filters/video/crop.c'
  
  clang: error: no such file or directory: 'filters/video/crop.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/filters/video/depth.c'
  
  clang: error: no such file or directory: 'filters/video/depth.o'
  
  clang: error: no input files
  
  clang: error: no such file or directory: '/extras/getopt.c'
  
  clang: error: no such file or directory: 'extras/getopt.o'
  
  clang: error: no input files
  
  make: *** [.depend] Error 1

  How to enable pthread support ?