标签：
最近比较闲,苦于ios设备上没有直接播放torrent 文件的软件,开始折腾了.找了不少资料有了思路.但是其中用到了ffmpeg 这个东西.
ffmpeg 是通用的一个视频解决框架,用C语言编写,通用性很强.
#!/bin/sh
# directories
SOURCE="ffmpeg-2.5"
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="$CONFIGURE_FLAGS --enable-avresample"
ARCHS="arm64 armv7s armv7 x86_64 i386"
COMPILE="y"
LIPO="y"
DEPLOYMENT_TARGET="6.0"
if [ "$*" ]
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
Undefined symbols for architecture armv7: "_deflateInit2_", referenced from: _encode_frame in libavcodec.a(pngenc.o) "_crc32", referenced from: _encode_frame in libavcodec.a(pngenc.o) "_deflateReset", referenced from: _encode_frame in libavcodec.a(lclenc.o) _encode_frame in libavcodec.a(zmbvenc.o) "_compress", referenced from: _encode_strip in libavcodec.a(tiffenc.o) "_deflateBound", referenced from: _flashsv_decode_frame in libavcodec.a(flashsv.o) _encode_frame in libavcodec.a(pngenc.o) _encode_frame in libavcodec.a(lclenc.o) "_inflateSync", referenced from: _flashsv_decode_frame in libavcodec.a(flashsv.o) "_inflateReset", referenced from: _flashsv_decode_frame in libavcodec.a(flashsv.o) _zlib_decomp in libavcodec.a(lcldec.o) _decode_frame in libavcodec.a(tscc.o) _zerocodec_decode_frame in libavcodec.a(zerocodec.o) _decode_frame in libavcodec.a(zmbv.o) "_iconv_open", referenced from: _avcodec_open2 in libavcodec.a(utils.o) _avcodec_decode_subtitle2 in libavcodec.a(utils.o) "_BZ2_bzDecompress", referenced from: _matroska_decode_buffer in libavformat.a(matroskadec.o) "_inflate", referenced from: _http_read_stream in libavformat.a(http.o) _matroska_decode_buffer in libavformat.a(matroskadec.o) _rtmp_open in libavformat.a(rtmpproto.o) _zlib_refill in libavformat.a(swfdec.o) _decode_frame_common in libavcodec.a(pngdec.o) _decode_text_chunk in libavcodec.a(pngdec.o) _flashsv_decode_frame in libavcodec.a(flashsv.o) ... "_inflateInit_", referenced from: _matroska_decode_buffer in libavformat.a(matroskadec.o) _rtmp_open in libavformat.a(rtmpproto.o) _swf_read_header in libavformat.a(swfdec.o) _decode_frame_apng in libavcodec.a(pngdec.o) _decode_frame_png in libavcodec.a(pngdec.o) _decode_text_chunk in libavcodec.a(pngdec.o) _flashsv_decode_init in libavcodec.a(flashsv.o) ... "_iconv", referenced from: _avcodec_decode_subtitle2 in libavcodec.a(utils.o) "_BZ2_bzDecompressEnd", referenced from: _matroska_decode_buffer in libavformat.a(matroskadec.o) "_inflateInit2_", referenced from: _http_read_header in libavformat.a(http.o) "_deflateEnd", referenced from: _flashsv_decode_frame in libavcodec.a(flashsv.o) _flashsv2_encode_frame in libavcodec.a(flashsv2enc.o) _flashsv_encode_init in libavcodec.a(flashsvenc.o) _flashsv_encode_end in libavcodec.a(flashsvenc.o) _encode_frame in libavcodec.a(pngenc.o) _encode_end in libavcodec.a(lclenc.o) _encode_init in libavcodec.a(zmbvenc.o) ... "_BZ2_bzDecompressInit", referenced from: _matroska_decode_buffer in libavformat.a(matroskadec.o) "_deflateInit_", referenced from: _flashsv_decode_frame in libavcodec.a(flashsv.o) _flashsv2_encode_frame in libavcodec.a(flashsv2enc.o) _encode_init in libavcodec.a(lclenc.o) _encode_init in libavcodec.a(zmbvenc.o) "_zlibCompileFlags", referenced from: _http_read_header in libavformat.a(http.o) "_compress2", referenced from: _flashsv2_encode_frame in libavcodec.a(flashsv2enc.o) _flashsv_encode_frame in libavcodec.a(flashsvenc.o) "_deflate", referenced from: _flashsv_decode_frame in libavcodec.a(flashsv.o) _flashsv2_encode_frame in libavcodec.a(flashsv2enc.o) _encode_frame in libavcodec.a(pngenc.o) _encode_frame in libavcodec.a(lclenc.o) _encode_frame in libavcodec.a(zmbvenc.o) "_inflateEnd", referenced from: _http_close in libavformat.a(http.o) _http_read_header in libavformat.a(http.o) _matroska_decode_buffer in libavformat.a(matroskadec.o) _rtmp_open in libavformat.a(rtmpproto.o) _swf_read_close in libavformat.a(swfdec.o) _decode_frame_apng in libavcodec.a(pngdec.o) _decode_frame_png in libavcodec.a(pngdec.o) ... "_uncompress", referenced from: _id3v2_read_internal in libavformat.a(id3v2.o) _mov_read_cmov in libavformat.a(mov.o) _swf_read_packet in libavformat.a(swfdec.o) _decode_frame in libavcodec.a(cscd.o) _decode_frame in libavcodec.a(dxa.o) _decode_block in libavcodec.a(exr.o) _g2m_decode_frame in libavcodec.a(g2meet.o) ... "_iconv_close", referenced from: _avcodec_open2 in libavcodec.a(utils.o) _avcodec_decode_subtitle2 in libavcodec.a(utils.o) ld: symbol(s) not found for architecture armv7 clang: error: linker command failed with exit code 1 (use -v to see invocation)
导入 libz.1.2.5.dylib ,再次编译
Undefined symbols for architecture armv7: "_BZ2_bzDecompressInit", referenced from: _matroska_decode_buffer in libavformat.a(matroskadec.o) "_iconv", referenced from: _avcodec_decode_subtitle2 in libavcodec.a(utils.o) "_BZ2_bzDecompress", referenced from: _matroska_decode_buffer in libavformat.a(matroskadec.o) "_BZ2_bzDecompressEnd", referenced from: _matroska_decode_buffer in libavformat.a(matroskadec.o) "_iconv_open", referenced from: _avcodec_open2 in libavcodec.a(utils.o) _avcodec_decode_subtitle2 in libavcodec.a(utils.o) "_iconv_close", referenced from: _avcodec_open2 in libavcodec.a(utils.o) _avcodec_decode_subtitle2 in libavcodec.a(utils.o) ld: symbol(s) not found for architecture armv7 clang: error: linker command failed with exit code 1 (use -v to see invocation)
导入 libbz2.1.0.dylib ,再次编译
Undefined symbols for architecture armv7: "_iconv", referenced from: _avcodec_decode_subtitle2 in libavcodec.a(utils.o) "_iconv_open", referenced from: _avcodec_open2 in libavcodec.a(utils.o) _avcodec_decode_subtitle2 in libavcodec.a(utils.o) "_iconv_close", referenced from: _avcodec_open2 in libavcodec.a(utils.o) _avcodec_decode_subtitle2 in libavcodec.a(utils.o) ld: symbol(s) not found for architecture armv7 clang: error: linker command failed with exit code 1 (use -v to see invocation)
导入 libiconv.2.4.0.dylib 编译通过
到此准备结束
标签：
原文地址：http://www.cnblogs.com/liyufeng2013/p/4286684.html
