实战x264，ffmpeg库编译

之前都是看别人的，转载别人的,今天终于要自己亲自操刀啦。哎。

废话少说，入正题

 我的环境：

   xcode 6.1   sdk6.1

   真机armv7 和 i386

   X264   最新的

  ffmpeg  1.2.1

一，x264库的编译

首先到http://www.videolan.org/developers/x264.html下载x264的库，然后解压。

我是在根目录下新建H264目录，解压后的代码放入H264目录。然后打开终端

   cd H264  然后

 i386 下命令

CC=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc  ./configure --host=i386-apple-darwin --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.1.sdk  --extra-cflags='-arch i386' --extra-ldflags='-arch i386 -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.1.sdk/usr/lib/system -arch i386 '  --disable-asm --enable-shared --enable-static --disable-asm

armv7 下命令

CC=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc ./configure --host=arm-apple-darwin --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk --extra-cflags='-arch armv7' --extra-ldflags='-arch armv7 -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk/usr/lib/system' --enable-pic   --enable-shared --enable-static --disable-asm

后回车，正常情况是如下：

fatal: Not a git repository (or any of the parent directories): .git

platform:      ARM

system:        MACOSX

cli:           yes

libx264:       internal

shared:        yes

static:        yes

asm:           yes

interlaced:    yes

avs:           avxsynth

lavf:          no

ffms:          no

gpac:          no

gpl:           yes

thread:        posix

opencl:        yes

filters:       crop select_every 

debug:         no

gprof:         no

strip:         no

PIC:           yes

visualize:     no

bit depth:     8

chroma format: all

You can run 'make' or 'make fprofiled' now.

 然后就make   会执行一堆东西

然后就是make install  就会如下

install -d /usr/local/bin

install x264 /usr/local/bin

install -d /usr/local/include

install -d /usr/local/lib

install -d /usr/local/lib/pkgconfig

install -m 644 ./x264.h /usr/local/include

install -m 644 x264_config.h /usr/local/include

install -m 644 x264.pc /usr/local/lib/pkgconfig

ln -f -s libx264.135.dylib /usr/local/lib/libx264.dylib

install -m 755 libx264.135.dylib /usr/local/lib

install -m 644 libx264.a /usr/local/lib

ranlib /usr/local/lib/libx264.a

  ---恭喜你，单独编译好x264库了。

编译好之后，文件会生成在虚拟路径/usr/local下面

我遇到的几个错误：

1. No working C compiler found.

     解决思路： 1.安装Xcode是否正确（一般都正确的）。2.独立安装command Line Tools(偏好设置-》下载-》command Line Tools 后面显示installed 状态)

                          3.这个是我犯的错误 命令行中少了L字符，我以为没有用，就省了，结果查了很久。 哎。 下次还是直接拷贝吧。拷贝绝对不会错。

                          4.终端的版本号也不要太低。我的是2.3（309）--在关于终端上查看。

2.Operation not permitted

如下：

install -d /usr/local/bin
install: chmod 755 /usr/local/bin: Operation not permitted
install x264 /usr/local/bin
install: /usr/local/bin/x264: Permission denied
make: *** [install-cli] Error 71
MACtekiiMac:H264 mac$ make install
install -d /usr/local/bin
install: chmod 755 /usr/local/bin: Operation not permitted
install x264 /usr/local/bin
install: /usr/local/bin/x264: Permission denied
make: *** [install-cli] Error 71

这些错误就是权限问题啦。  

   解决办法：在终端输入   sodu -s  回车  然后输入password，就可以。

3.如果是重复编译，不删除H264目录和/usr/local下的相关目录，会报错误。

      解决办法：建议每次编译都要重新新建H264目录（就是放x264源码的目录）。

4.编译ffmpeg库，要先编译x264库，因为我这里的ffmpeg关联了x264库。不能先编译ffmpeg库，也不能编译好x264就删除/usr/local下x264生成的相关文件。

二，ffmpeg库的编译

1.https://github.com/yuvi/gas-preprocessor下载gas-preprocessor.pl文件并将其放置到/usr/sbin路径下

2.去官网下载http://ffmpeg.org/download.html下载所需要版本代码，我下载的是1.2.1(最新的)，解压放在根目录下的ffmpeg1.2.1

3.进入终端，cd 到 ffmpeg1.2.1 目录，以下是编译参数

i386下命令

./configure \

--cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc \

--as='gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc' \

--sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.1.sdk\

--extra-ldflags=-L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.1.sdk/usr/lib/system\

--target-os=darwin \

--arch=i386 \

--cpu=i386 \

--extra-cflags='-I/ffmpegs/ffmpeg-1.2.1/x264/build/i386/include -arch i386' \       // /ffmpegs/ffmpeg-1.2.1这个目录是我ffmpeg源码解压后的目录 。x264在ffmpeg-1.2.1目录下

--extra-ldflags='-L/ffmpegs/ffmpeg-1.2.1/x264/build/i386/lib -arch i386 ' \

--enable-pic \

--enable-cross-compile \

--enable-gpl \

--enable-libx264 \

--extra-cflags=-I$SRCDIR/ffmpeg-${VERSION}/x264/build/i386/include \
--extra-ldflags=-L$SRCDIR/ffmpeg-${VERSION}/x264/build/i386/lib \

--disable-ffmpeg  \

--disable-ffplay \

--disable-ffserver \

--enable-decoder=h264 \
--enable-encoder=libx264 \

--disable-doc \

--disable-asm

armv7 下命令

./configure --enable-libx264 --enable-gpl --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/lib --disable-doc --enable-ffmpeg --enable-ffplay --disable-ffserver --disable-avfilter --disable-debug --disable-decoders --enable-cross-compile --disable-encoders --disable-armv5te  --enable-decoder=h264 --enable-encoder=libx264 --enable-pic --cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as='gas-preprocessor/gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' --extra-ldflags='-arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk' --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.1.sdk --target-os=darwin --arch=arm --cpu=cortex-a8 --extra-cflags='-arch armv7' --disable-asm

然后回车。

然后make

然后 make install。

如果顺利 如下：

bash-3.2# make install

INSTALL install-progs-yes

INSTALL ffprobe

INSTALL presets/libvpx-1080p.ffpreset

INSTALL presets/libvpx-1080p50_60.ffpreset

INSTALL presets/libvpx-360p.ffpreset

INSTALL presets/libvpx-720p.ffpreset

INSTALL presets/libvpx-720p50_60.ffpreset

INSTALL presets/libx264-ipod320.ffpreset

INSTALL presets/libx264-ipod640.ffpreset

INSTALL doc/ffprobe.xsd

INSTALL doc/examples/decoding_encoding.c

INSTALL doc/examples/demuxing.c

INSTALL doc/examples/filtering_audio.c

INSTALL doc/examples/filtering_video.c

INSTALL doc/examples/metadata.c

INSTALL doc/examples/muxing.c

INSTALL doc/examples/resampling_audio.c

INSTALL doc/examples/scaling_video.c

INSTALL doc/examples/Makefile

INSTALL doc/examples/README

INSTALL presets/libvpx-1080p.ffpreset

INSTALL presets/libvpx-1080p50_60.ffpreset

INSTALL presets/libvpx-360p.ffpreset

INSTALL presets/libvpx-720p.ffpreset

INSTALL presets/libvpx-720p50_60.ffpreset

INSTALL presets/libx264-ipod320.ffpreset

INSTALL presets/libx264-ipod640.ffpreset

INSTALL doc/ffprobe.xsd

INSTALL doc/examples/decoding_encoding.c

INSTALL doc/examples/demuxing.c

INSTALL doc/examples/filtering_audio.c

INSTALL doc/examples/filtering_video.c

INSTALL doc/examples/metadata.c

INSTALL doc/examples/muxing.c

INSTALL doc/examples/resampling_audio.c

INSTALL doc/examples/scaling_video.c

INSTALL doc/examples/Makefile

INSTALL doc/examples/README

INSTALL libavdevice/libavdevice.a

INSTALL libavformat/libavformat.a

INSTALL libavcodec/libavcodec.a

ranlib: file: /usr/local/lib/libavcodec.a(iff.o) has no symbols

INSTALL libpostproc/libpostproc.a

INSTALL libswresample/libswresample.a

INSTALL libswscale/libswscale.a

INSTALL libavutil/libavutil.a

INSTALL libavdevice/avdevice.h

INSTALL libavdevice/version.h

INSTALL libavdevice/libavdevice.pc

INSTALL libavformat/avformat.h

INSTALL libavformat/avio.h

INSTALL libavformat/version.h

INSTALL libavformat/libavformat.pc

INSTALL libavcodec/avcodec.h

INSTALL libavcodec/avfft.h

INSTALL libavcodec/dxva2.h

INSTALL libavcodec/old_codec_ids.h

INSTALL libavcodec/vaapi.h

INSTALL libavcodec/vda.h

INSTALL libavcodec/vdpau.h

INSTALL libavcodec/version.h

INSTALL libavcodec/xvmc.h

INSTALL libavcodec/libavcodec.pc

INSTALL libpostproc/postprocess.h

INSTALL libpostproc/version.h

INSTALL libpostproc/libpostproc.pc

INSTALL libswresample/swresample.h

INSTALL libswresample/version.h

INSTALL libswresample/libswresample.pc

INSTALL libswscale/swscale.h

INSTALL libswscale/version.h

INSTALL libswscale/libswscale.pc

INSTALL libavutil/adler32.h

INSTALL libavutil/aes.h

INSTALL libavutil/attributes.h

INSTALL libavutil/audio_fifo.h

INSTALL libavutil/audioconvert.h

INSTALL libavutil/avassert.h

INSTALL libavutil/avstring.h

INSTALL libavutil/avutil.h

INSTALL libavutil/base64.h

INSTALL libavutil/blowfish.h

INSTALL libavutil/bprint.h

INSTALL libavutil/bswap.h

INSTALL libavutil/channel_layout.h

INSTALL libavutil/common.h

INSTALL libavutil/cpu.h

INSTALL libavutil/crc.h

INSTALL libavutil/error.h

INSTALL libavutil/eval.h

INSTALL libavutil/fifo.h

INSTALL libavutil/file.h

INSTALL libavutil/hmac.h

INSTALL libavutil/imgutils.h

INSTALL libavutil/intfloat.h

INSTALL libavutil/intfloat_readwrite.h

INSTALL libavutil/intreadwrite.h

INSTALL libavutil/lfg.h

INSTALL libavutil/log.h

INSTALL libavutil/mathematics.h

INSTALL libavutil/md5.h

INSTALL libavutil/mem.h

INSTALL libavutil/dict.h

INSTALL libavutil/old_pix_fmts.h

INSTALL libavutil/opt.h

INSTALL libavutil/parseutils.h

INSTALL libavutil/pixdesc.h

INSTALL libavutil/pixfmt.h

INSTALL libavutil/random_seed.h

INSTALL libavutil/rational.h

INSTALL libavutil/samplefmt.h

INSTALL libavutil/sha.h

INSTALL libavutil/time.h

INSTALL libavutil/timecode.h

INSTALL libavutil/timestamp.h

INSTALL libavutil/version.h

INSTALL libavutil/xtea.h

INSTALL libavutil/lzo.h

INSTALL libavutil/avconfig.h

INSTALL libavutil/libavutil.pc

恭喜你，ffmpeg也编译好了。

--extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/lib就是你x264库的路径，用来寻找x264库的。用我之前编译的，默认就是/usr/local下面了；

--enable-libx264，--enable-encoder=libx264，这两句不要忘了，一个是连接x264，一个是打开x264的编码器，不写的话，因为我编译里面写了--disable-encoders ，程序里面会找不到x264的编码器的.

都编译好了以后，找到生成的几个库文件，将其添加到项目里面就可以使用了，当然别忘了头文件导入