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• Compile FFMPEG in iOS with bitcode mode

  16 février 2016, par Mr.G

  I compiled FFMPEG libs which supports for iOS 7 and 8 but since recent release with iOS 9 there is a new feature has issued which called bitcode mode , as a default setting , this setting has set to NO .

  But if i set this as yes , following error will execute ,

  libavdevice.a(avfoundation.o)’ does not contain bitcode. You must rebuild it with bitcode enabled (Xcode setting ENABLE_BITCODE), obtain an updated library from the vendor, or disable bitcode for this target. for architecture arm64

  Is there any way to compile FFMPEG which supports FFMpeg in bitcode enabled mode

  here is the build script i used

  #!/bin/sh
  
  
  
  # directories
  
  SOURCE="ffmpeg-2.6.2"
  
  FAT="FFmpeg-iOS"
  
  
  
  SCRATCH="scratch"
  
  # must be an absolute path
  
  THIN=`pwd`/"thin"
  
  
  
  # absolute path to x264 library
  
  #X264=`pwd`/fat-x264
  
  
  
  #FDK_AAC=`pwd`/fdk-aac/fdk-aac-ios
  
  
  
  CONFIGURE_FLAGS="--enable-cross-compile --disable-debug --disable-programs \
  
                   --disable-doc --enable-pic"
  
  
  
  if [ "$X264" ]
  
  then
  
      CONFIGURE_FLAGS="$CONFIGURE_FLAGS --enable-gpl --enable-libx264"
  
  fi
  
  
  
  if [ "$FDK_AAC" ]
  
  then
  
      CONFIGURE_FLAGS="$CONFIGURE_FLAGS --enable-libfdk-aac"
  
  fi
  
  
  
  # avresample
  
  #CONFIGURE_FLAGS="$CONFIGURE_FLAGS --enable-avresample"
  
  
  
  ARCHS="arm64 armv7 x86_64 i386"
  
  
  
  COMPILE="y"
  
  LIPO="y"
  
  
  
  DEPLOYMENT_TARGET="6.0"
  
  
  
  if [ "$*" ]
  
  then
  
      if [ "$*" = "lipo" ]
  
      then
  
          # skip compile
  
          COMPILE=
  
      else
  
          ARCHS="$*"
  
          if [ $# -eq 1 ]
  
          then
  
              # skip lipo
  
              LIPO=
  
          fi
  
      fi
  
  fi
  
  
  
  if [ "$COMPILE" ]
  
  then
  
      if [ ! `which yasm` ]
  
      then
  
          echo 'Yasm not found'
  
          if [ ! `which brew` ]
  
          then
  
              echo 'Homebrew not found. Trying to install...'
  
              ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)" \
  
                  || exit 1
  
          fi
  
          echo 'Trying to install Yasm...'
  
          brew install yasm || exit 1
  
      fi
  
      if [ ! `which gas-preprocessor.pl` ]
  
      then
  
          echo 'gas-preprocessor.pl not found. Trying to install...'
  
          (curl -L https://github.com/libav/gas-preprocessor/raw/master/gas-preprocessor.pl \
  
              -o /usr/local/bin/gas-preprocessor.pl \
  
              && chmod +x /usr/local/bin/gas-preprocessor.pl) \
  
              || exit 1
  
      fi
  
  
  
      if [ ! -r $SOURCE ]
  
      then
  
          echo 'FFmpeg source not found. Trying to download...'
  
          curl http://www.ffmpeg.org/releases/$SOURCE.tar.bz2 | tar xj \
  
              || exit 1
  
      fi
  
  
  
      CWD=`pwd`
  
      for ARCH in $ARCHS
  
      do
  
          echo "building $ARCH..."
  
          mkdir -p "$SCRATCH/$ARCH"
  
          cd "$SCRATCH/$ARCH"
  
  
  
          CFLAGS="-arch $ARCH"
  
          if [ "$ARCH" = "i386" -o "$ARCH" = "x86_64" ]
  
          then
  
              PLATFORM="iPhoneSimulator"
  
              CFLAGS="$CFLAGS -mios-simulator-version-min=$DEPLOYMENT_TARGET"
  
          else
  
              PLATFORM="iPhoneOS"
  
              CFLAGS="$CFLAGS -mios-version-min=$DEPLOYMENT_TARGET"
  
              if [ "$ARCH" = "arm64" ]
  
              then
  
                  EXPORT="GASPP_FIX_XCODE5=1"
  
              fi
  
          fi
  
  
  
          XCRUN_SDK=`echo $PLATFORM | tr '[:upper:]' '[:lower:]'`
  
          CC="xcrun -sdk $XCRUN_SDK clang"
  
          CXXFLAGS="$CFLAGS"
  
          LDFLAGS="$CFLAGS"
  
          if [ "$X264" ]
  
          then
  
              CFLAGS="$CFLAGS -I$X264/include"
  
              LDFLAGS="$LDFLAGS -L$X264/lib"
  
          fi
  
          if [ "$FDK_AAC" ]
  
          then
  
              CFLAGS="$CFLAGS -I$FDK_AAC/include"
  
              LDFLAGS="$LDFLAGS -L$FDK_AAC/lib"
  
          fi
  
  
  
          TMPDIR=${TMPDIR/%\/} $CWD/$SOURCE/configure \
  
              --target-os=darwin \
  
              --arch=$ARCH \
  
              --cc="$CC" \
  
              $CONFIGURE_FLAGS \
  
              --extra-cflags="$CFLAGS" \
  
              --extra-cxxflags="$CXXFLAGS" \
  
              --extra-ldflags="$LDFLAGS" \
  
              --prefix="$THIN/$ARCH" \
  
          || exit 1
  
  
  
          make -j3 install $EXPORT || exit 1
  
          cd $CWD
  
      done
  
  fi
  
  
  
  if [ "$LIPO" ]
  
  then
  
      echo "building fat binaries..."
  
      mkdir -p $FAT/lib
  
      set - $ARCHS
  
      CWD=`pwd`
  
      cd $THIN/$1/lib
  
      for LIB in *.a
  
      do
  
          cd $CWD
  
          echo lipo -create `find $THIN -name $LIB` -output $FAT/lib/$LIB 1>&2
  
          lipo -create `find $THIN -name $LIB` -output $FAT/lib/$LIB || exit 1
  
      done
  
  
  
      cd $CWD
  
      cp -rf $THIN/$1/include $FAT
  
  fi
  
  
  
  echo Done

• Merge commit ’b4dd424d96f09f9bafb88e47f37df65dc4529143’

  13 mars 2014, par Michael Niedermayer

  Merge commit ’b4dd424d96f09f9bafb88e47f37df65dc4529143’
  * commit ’b4dd424d96f09f9bafb88e47f37df65dc4529143’ :
  
    Remove all SPARC architecture optimizations
  Conflicts :
  
  	Makefile
  
  	configure
  
  	libavcodec/sparc/dsputil_vis.c
  
  	libavcodec/sparc/dsputil_vis.h
  
  	libavcodec/sparc/hpeldsp_vis.c
  
  	libavcodec/sparc/simple_idct_vis.c
  
  	libavcodec/sparc/vis.h
  
  	libswscale/sparc/yuv2rgb_vis.c
  
  	libswscale/swscale_internal.h
  If someone wants to maintain these (or other) SPARC optimizations, please
  
  contact me or ffmpeg-devel.
  
  I am happy to revert this removial if theres someone considering to
  
  maintain this code.
  Merged-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] Makefile
  • [DH] arch.mak
  • [DH] configure
  • [DH] doc/optimization.txt
  • [DH] libavcodec/avcodec.h
  • [DH] libavcodec/dsputil.c
  • [DH] libavcodec/dsputil.h
  • [DH] libavcodec/hpeldsp.c
  • [DH] libavcodec/hpeldsp.h
  • [DH] libavcodec/sparc/Makefile
  • [DH] libavcodec/sparc/dsputil_vis.c
  • [DH] libavcodec/sparc/dsputil_vis.h
  • [DH] libavcodec/sparc/hpeldsp_vis.c
  • [DH] libavcodec/sparc/simple_idct_vis.c
  • [DH] libavcodec/sparc/vis.h
  • [DH] libavcodec/version.h
  • [DH] libswscale/sparc/Makefile
  • [DH] libswscale/sparc/yuv2rgb_vis.c
  • [DH] libswscale/swscale_internal.h
  • [DH] libswscale/yuv2rgb.c

• Building FFMPEG library for iOS5.1 ARMv7 Processor

  26 octobre 2012, par Jimmy

  I cleaned up my question a little bit, when I wrote it the first time I was flustered. Now I can be more clear after taking a small break.

  I'm trying to use the FFMPEG library in an XCode 4.5.1 project. And I'm trying to build it for ARMv7. What I'm looking for is the exact process, and some explanation. I understand that this is not a well documented problem. But I know that other pople have had the same problem as me.

  What I have been able to do.

  I have been able to build the library for xCode. here Is what I have been able to do step by step.

  1) I have been able to clone ffmpeg. For beginners this will get you started by creating a directory with the ffmpeg source. (Kudos to the guys who wrote it)

  git clone git ://source.ffmpeg.org/ffmpeg.git ffmpeg

  2) I have been able to write a config file that doesn't have any errors. We will go back to this part later. This is the command I attach to ./configure

  ./configure
  —disable-doc
  —disable-ffmpeg
  —disable-ffplay
  —disable-ffserver
  —enable-cross-compile
  —arch=arm
  —target-os=darwin
  —cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/llvm-gcc-4.2/bin/arm-apple-darwin10-llvm-gcc-4.2

  —as='gas-preprocessor/gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/llvm-gcc-4.2/bin/arm-apple-darwin10-llvm-gcc-4.2'

  —sysroot=/applications/xcode.app/contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk

  —cpu=cortex-a8
  —extra-ldflags='-arch=armv7 -isysroot /applications/xcode.app/contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk'
  —enable-pic —disable-bzlib —disable-gpl —disable-shared —enable-static —disable-mmx —disable-debug —disable-neon —extra-cflags='-pipe -Os -gdwarf-2 -isysroot /applications/xcode.app/contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk
  -m$thumb_opt :-no-thumb -mthumb-interwork'

  These are some things to note.

  • I had to download ( https://github.com/yuvi/gas-preprocessor ) copy the file gas-preprocessor.pl at /usr/local/bin. Set permissions to read write (777)
  • Make sure I'm using the right GCC compiler : /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/llvm-gcc-4.2/bin/arm-apple-darwin10-llvm-gcc-4.2
  • Make sure I'm using the right SDK : /applications/xcode.app/contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk
  • —extra-cflags="-arch armv7" causes : error : unrecognized command line option “-arch”

  Here in lies the problem.

  When I include the library and the declaration. Everything works fine ! (You will want to make sure your library paths in xcode are properly written if it can't find the library. There are plenty of people with this problem, stackover flow has a wealth of knowledge here)

  But when I started to write the encoder. I received this warning, and countless errors.

  ignoring file /Users/Jimmy/Development/source.ffmpeg/Library/libavutil.a, file was built for archive which is not the architecture being linked (armv7s) : /Users/Jimmy/Development/source.ffmpeg/Library/libavutil.a

  That means that I didn't build for ARMv7 and that -arch configuration I took out is actually essential.

  What I'm looking for is someone whose done it before, to walk all of us through the process of building FFMPEG for iOS5.1 and ARMv7 and the majority of things to look out for. If no one comes forth, in time I'll answer my own question and hopefully help out others who are struggling too.