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• pixlet : Fix architecture-dependent code and values

  2 mars 2017, par Vittorio Giovara

  pixlet : Fix architecture-dependent code and values
  The constants used in the decoder used floating point precision,
  
  and this caused different values to be generated on different
  
  architectures. Additionally on big endian machines, the fate test
  
  would output bytes in native order, which is different from the one
  
  hardcoded in the test.
  So, eradicate floating point numbers and use fixed point (32.32)
  
  arithmetics everywhere, replacing constants with precomputed integer
  
  values, and force the pixel format output to be the same in the fate
  
  test.
  Signed-off-by : Vittorio Giovara <vittorio.giovara@gmail.com>
  

  • [DBH] libavcodec/pixlet.c
  • [DBH] tests/fate/video.mak
  • [DBH] tests/ref/fate/pixlet

• How to build FFMPEG for all architecture of android device ?

  14 novembre 2016, par Prakash U

  I am trying to build ffmpeg for android in windows 8.1 using CYGWIN

  I am following This question & How to compile FFMPEG under Cygwin . I succsessfully compile but it is not generate FFMPEG.so but it generate ffmpeg.exe file

  I don’t want any prebuild ffmpeg library . I want to build it for my requirement.

  I perform this steps In CYGWIN BASE

  1. git clone git ://source.ffmpeg.org/ffmpeg.git ffmpeg
  2. dos2unix configure
  3. dos2unix build_ffmpeg.sh
  4. make distclean
  5. ./configure –enable-static –disable-shared
  6. make
  7. make install

  my build_ffmpeg.sh is

  # !/bin/bash

  NDK=/cygdrive/e/android/sdk/ndk-bundle
  PLATFORM=$NDK/platforms/android-24/arch-arm
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/windows
  CPU=arm
  PREFIX=$(pwd)/android/$CPU
  ADDI_CFLAGS="-marm"

  pushd ffmpeg
  # Configure
  ./configure \
  —target-os=android \
  —prefix=$PREFIX \
  —enable-cross-compile \
  —enable-runtime-cpudetect \
  —disable-asm \
  —arch=arm \
  —cc=$TOOLCHAIN/bin/arm-linux-androideabi-gcc \
  —cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  —disable-stripping \
  —nm=$TOOLCHAIN/bin/arm-linux-androideabi-nm \
  —sysroot=$PLATFORM \
  —disable-programs \
  —disable-doc \
  —enable-protocol=file \
  —disable-avresample \
  —enable-gpl \
  —enable-version3 \
  —enable-nonfree \
  —disable-ffplay \
  —disable-ffserver \
  —disable-ffmpeg \
  —disable-ffprobe \
  —extra-cflags="-fPIC -DANDROID -D__thumb__ -mthumb -Wfatal-errors -Wno-deprecated $ADDI_CFLAGS" \
  —extra-libs="-lgcc" \
  —extra-ldflags="-L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog"
  # Make
  make clean
  make -j5
  make -j5 install

  popd

  My LOG file is here

  My question is how to build ffmpeg for all architecture of android device ?

• FFMPEG binaries throw error : Undefined Symbols for Architecture x86_64

  19 octobre 2016, par Swati

  I have created a cocoa app that uses FFMPEG libraries for streaming.

  Uptill now i was using FFMPEG version 3.1.1 and i had libraries available to me. Now i downloaded the latest FFMPEG version 3.1.4.

  I executed the shell script and libraries were generated but when i use the with my xcode [6.1 or any] I get error as shown in attached image.

  Can anybody plz guide me about solving this issue.

  Thanks in advance..

  

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