FFmpeg 编译

                                                   FFmpeg 编译

下载地址：
https://github.com/FFmpeg/FFmpeg

目录准备：
建立一个目录名为FFmpeg，其中建立两个目录，一个名为build（存放编译相关信息），一个名为FFmpeg-master(源代码)。在build路径中建立一个名为@executable_path的目录，用于存放编译结果。

编译：
1 进入编译路径
cd */FFmpeg/build

2 查看编译参数
../FFmpeg-master/configure -h

--disable-securetransport  disable Secure Transport, needed for TLS support on OSX if openssl and gnutls are not used

Found private symbol usage.
Symbol: _SecIdentityCreate
From framework: /System/Library/Frameworks/Security.framework/Versions/A/Security
In binary: Contents/MacOS/lib/libavformat.58.dylib

3 编译命令

../FFmpeg-master/configure --prefix=@executable_path --libdir=@executable_path --arch=x86 --enable-shared --disable-static --disable-doc --enable-gpl --enable-version3 --enable-libmp3lame --enable-libtheora --enable-libx264  --enable-libx265 --enable-zlib --enable-libvorbis --enable-libopus --disable-securetransport

../FFmpeg-master/configure --prefix=@executable_path --libdir=@executable_path --arch=x86 --enable-shared --disable-static --disable-doc --enable-gpl --enable-version3 --enable-libmp3lame --enable-libtheora --enable-libx264  --enable-libx265 --enable-zlib --enable-libvorbis --enable-libopus --disable-securetransport

ERROR: opus not found using pkg-config
ERROR: vorbis not found using pkg-config

export PKG_CONFIG_PATH=/usr/local/pkgconfig:/usr/local/lib/pkgconfig:/usr/share/pkgconfig:/usr/local/lib64/pkgconfig:/usr/lib64/pkgconfig
 
如果：没有libx264等库，使用brew install 安装。    

4 编译并安装
make

make install

5 更改各个库的默认搜索路径

libavformat.dylib

install_name_tool -change @executable_path/libavcodec.58.dylib @executable_path/lib/libavcodec.58.dylib "/Volumes/860_500/学习/FFmpeg/build/@executable_path/libavformat.58.dylib"

install_name_tool -change @executable_path/libavcodec.58.dylib @executable_path/lib/libavcodec.58.dylib "/Volumes/860_500/学习/FFmpeg/build/@executable_path/libavformat.58.dylib"
。。。。。。