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• Problems compiling object using arm-linux-androideabi-gcc and android ndk

  24 septembre 2014, par shishir123

  I am trying to build FFmpeg source file using android ndk r8b version . My linux version is CentOs 6.5.I am following this instruction from this link https://github.com/yixia/FFmpeg-Android
  Here is bash script which is I am trying to execute

       #!/bin/bash
  
  
  
      DEST=`pwd`/build/ffmpeg && rm -rf $DEST
  
      SOURCE=`pwd`/ffmpeg
  
  
  
      if [ -d ffmpeg ]; then
  
        cd ffmpeg
  
      else
  
        git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg
  
        cd ffmpeg
  
      fi
  
  
  
      git reset --hard
  
      git clean -f -d
  
      git checkout `cat ../ffmpeg-version`
  
      patch -p1 <../FFmpeg-VPlayer.patch
  
      [ $PIPESTATUS == 0 ] || exit 1
  
  
  
      git log --pretty=format:%H -1 > ../ffmpeg-version
  
  
  
      TOOLCHAIN=/tmp/vplayer
  
      SYSROOT=$TOOLCHAIN/sysroot/
  
      $ANDROID_NDK/build/tools/make-standalone-toolchain.sh --platform=android-14 --install-     dir=$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 \
  
        -Wno-psabi -Wa,--noexecstack \
  
        -D__ARM_ARCH_5__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5TE__ \
  
        -DANDROID -DNDEBUG"
  
  
  
      FFMPEG_FLAGS="--target-os=linux \
  
        --arch=arm \
  
        --enable-cross-compile \
  
        --cross-prefix=arm-linux-androideabi- \
  
        --enable-shared \
  
        --disable-symver \
  
        --disable-doc \
  
        --disable-ffplay \
  
        --disable-ffmpeg \
  
        --disable-ffprobe \
  
        --disable-ffserver \
  
        --disable-avdevice \
  
        --disable-avfilter \
  
        --disable-encoders \
  
        --disable-muxers \
  
        --disable-filters \
  
        --disable-devices \
  
        --disable-everything \
  
        --enable-protocols  \
  
        --enable-parsers \
  
        --enable-demuxers \
  
        --enable-decoders \
  
        --enable-bsfs \
  
        --enable-network \
  
        --enable-swscale  \
  
        --disable-demuxer=sbg \
  
        --disable-demuxer=dts \
  
        --disable-parser=dca \
  
        --disable-decoder=dca \
  
        --enable-asm \
  
        --enable-version3"
  
  
  
  
  
      for version in neon armv7 vfp armv6; do
  
  
  
        cd $SOURCE
  
  
  
        case $version in
  
          neon)
  
            EXTRA_CFLAGS="-march=armv7-a -mfpu=neon -mfloat-abi=softfp -mvectorize-with-neon-quad"
  
            EXTRA_LDFLAGS="-Wl,--fix-cortex-a8"
  
            ;;
  
          armv7)
  
            EXTRA_CFLAGS="-march=armv7-a -mfpu=vfpv3-d16 -mfloat-abi=softfp"
  
            EXTRA_LDFLAGS="-Wl,--fix-cortex-a8"
  
            ;;
  
          vfp)
  
            EXTRA_CFLAGS="-march=armv6 -mfpu=vfp -mfloat-abi=softfp"
  
            EXTRA_LDFLAGS=""
  
            ;;
  
          armv6)
  
            EXTRA_CFLAGS="-march=armv6"
  
            EXTRA_LDFLAGS=""
  
            ;;
  
          *)
  
            EXTRA_CFLAGS=""
  
            EXTRA_LDFLAGS=""
  
            ;;
  
        esac
  
  
  
        PREFIX="$DEST/$version" && mkdir -p $PREFIX
  
        FFMPEG_FLAGS="$FFMPEG_FLAGS --prefix=$PREFIX"
  
  
  
        ./configure $FFMPEG_FLAGS --extra-cflags="$CFLAGS $EXTRA_CFLAGS" --extra-     ldflags="$EXTRA_LDFLAGS" | tee $PREFIX/configuration.txt
  
        cp config.* $PREFIX
  
        [ $PIPESTATUS == 0 ] || exit 1
  
  
  
        make clean
  
        make -j4 || exit 1
  
        make install || exit 1
  
  
  
        rm libavcodec/inverse.o
  
        $CC -lm -lz -shared --sysroot=$SYSROOT -Wl,--no-undefined -Wl,-z,noexecstack $EXTRA_LDFLAGS libavutil/*.o libavutil/arm/*.o libavcodec/*.o libavcodec/arm/*.o libavformat/*.o libswresample/*.o libswscale/*.o -o $PREFIX/libffmpeg.so
  
  
  
        cp $PREFIX/libffmpeg.so $PREFIX/libffmpeg-debug.so
  
        arm-linux-androideabi-strip --strip-unneeded $PREFIX/libffmpeg.so
  
  
  
      done

  Now i am getting this error ./FFmpeg-Android.sh: line 26: export:arm-linux-androideabi-gcc’ : not a valid identifier
  arm-linux-androideabi-gcc is unable to create an executable file.
  C compiler test failed.`

  The code in 26 number line is export CC=arm-linux-androideabi-gcc any idea why the problem is happening ?? a help would be appreciated .

• HLS MPEG-TS metadata stream using FFMPEG

  20 janvier 2015, par Ramesh Prasad

  I want to create mpeg ts segment for HLS streaming. The ts should contain metadata as a separate stream as shown below-

  **Stream #0:0**[0x102]: Data: timed_id3 (ID3  / 0x20334449) 
  
  **Stream #0:1**[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 426x240, 25 fps, 25 tbr, 90k tbn, 6k tbc
  
  **Stream #0:2**[0x101]: Audio: aac ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 98 kb/s

  I am using ffmpeg and have tried various option. I get the following ts structure-

  **service_name**    : Service01
  
  **service_provider**: FFmpeg
  
  **Stream #0:0[0x100]**: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv), 720x576 [SAR 1:1 DAR 5:4], max. 104857 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
  
  **Stream #0:1[0x101]**: Audio: mp2 ([3][0][0][0] / 0x0003), 16000 Hz, mono, s16p, 143 kb/s

  using the following command-

  ffmpeg -i news.ts -t 10 -metadata:s:v:0 TITLE="Some Provider" -id3v2_version 4 -write_id3v1 1 segid3.ts

  How to get the metadata as a separate stream in the ts file using ffmpeg ?

• Add partial_tukey and punchout_tukey apodization functions

  10 août 2014, par Martijn van Beurden

  Add partial_tukey and punchout_tukey apodization functions
  Adds two new apodization functions that seem to perform better than
  
  the apodization functions currently in the codebase and fixes three
  
  existing windows as well.
  Its important to note that this patch only affects the encoder stage
  
  that evaluates various possible predictors. Audio encoded with these
  
  new windows will still decode with existing legacy decoders.
  = Theory =
  
  These functions are used to window the  audio data at the predictor
  
  stage. These news functions enable the use of only part of the signal
  
  to generate a predictor. This helps  because short transients can
  
  introduce noise into the predictor. The  predictor becomes very good
  
  at prediciting one part of the  signal, instead of mediocre for the
  
  whole block.
  Signed-off-by : Erik de Castro Lopo <erikd@mega-nerd.com>
  

  • [DH] doc/html/documentation_tools_flac.html
  • [DH] include/FLAC/stream_encoder.h
  • [DH] man/flac.1
  • [DH] man/flac.sgml
  • [DH] src/libFLAC/include/private/window.h
  • [DH] src/libFLAC/include/protected/stream_encoder.h
  • [DH] src/libFLAC/stream_encoder.c
  • [DH] src/libFLAC/window.c