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  • 模拟器与真机下ffmpeg的编译方法(总结版)

    本文由论坛会员sun_t89分享

    如果不了解什么是ffmepg,请移步http://ffmpeg.org 先了解下:)

    编译ffmepg模拟器版本:
    1. 到https://github.com/gabriel/ffmpeg-iphone-build下载ffmpeg-iphone-build
    2.先将gas-preprocessor.pl拷贝到/usr/sbin/目录中。
    3.到ffmpeg官网上下载ffmpeg源码
    4.在终端下定位到ffmpeg的目录运行
    ./configure --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffserver --disable-avfilter --disable-debug --disable-encoders --enable-cross-compile --disable-decoders --disable-armv5te --enable-decoder=h264 --enable-pic --cc=/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc --as='gas-preprocessor/gas-preprocessor.pl /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc' --extra-ldflags=-L/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk/usr/lib/system --sysroot=/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk --target-os=darwin --arch=i386 --cpu=i386 --extra-cflags='-arch i386' --extra-ldflags='-arch i386'
    5.输入make命令
    6.将libavcodec.a,libavdevice.a,libavformat.a,libavutil.a,libswscale.a到对应的目录下拷贝出来。
    7.在项目中就可以使用了。可以参考开源示例iFrameExtractor (git clone git://github.com/lajos/iFrameExtractor.git)需要将该项目的ffmpeg文件夹库替换为你编译的 ffmpeg源码文件夹,在ffmpeg目录下新建lib目录,将刚刚拷贝出来的静态库拷贝进去。打开项目,添加libbz2.1.0.dylib系统库 文件。点击编译运行就可以使用了。
    8.注意如果使用的是ffmpeg0.8.5的库的话iFrameExtractor中的codec_type需要修改为AVMEDIA_TYPE_VIDEO。(下同)

     
    编译arm7版本,网上搜到的版本,完全按照以下步骤做就行了。可以编译出arm7的库。
    1. 下载:
    git clone git://github.com/lajos/iFrameExtractor.git
    2. 编辑:
    build_armv6和build_armv7,修改./configure后面的参数,主要是SDK版本.我的是4.3,修改为:
    ./configure --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffserver --enable-cross-compile --arch=arm --target-os=darwin --cc=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as='gas-preprocessor/gas-preprocessor.pl /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' --sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk --cpu=arm1176jzf-s --extra-cflags='-arch armv6' --extra-ldflags='-arch armv6'

    3. 编译:
    出错,提示:
    /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc is unable to create an executable file.
    C compiler test failed.
    查看config.err文件,最后提示:
    ld: file not found: /usr/lib/system/libcache.dylib for architecture armv7
    collect2: ld returned 1 exit status
    4. 重新修改configure参数为:
    ./configure --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffserver --enable-cross-compile --arch=arm --target-os=darwin --cc=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as='gas-preprocessor/gas-preprocessor.pl /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' --sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk --cpu=cortex-a8 --extra-cflags='-arch armv7' --extra-ldflags='-arch armv7 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk' --enable-pic
    5. 编译:
    build_armv7
    最后生成静态库,在lib目录和armv7目录.
    6.用xcode打开iFrameExtractor.xcodeproj,现在编译会出错,需要修改几个地方:
    左边选中工程,中间选中target,右面选中Build settings,在Architectures选项卡里面选择Architetures为Optimized(armv7),Base SDK为Latest iOS(iOS 4.3) Valid Architectures填写armv7.
    编译目标选择iOS Device,当然,如果有连接电脑的设备,可以选择设备.
    编译,提示:


    Undefined symbols for architecture armv7:
    "_BZ2_bzDecompressInit", referenced from:
    _matroska_decode_buffer in libavformat.a(matroskadec.o)
    "_BZ2_bzDecompressEnd", referenced from:
    _matroska_decode_buffer in libavformat.a(matroskadec.o)
    "_BZ2_bzDecompress", referenced from:
    _matroska_decode_buffer in libavformat.a(matroskadec.o)

    添加库libbz2.1.0.dylib,再次编译,OK通过

    模拟器与真机下ffmpeg的编译方法(总结版)

    单独窗口打印放大字号缩小字号

    本文由论坛会员sun_t89分享 如果不了解什么是ffmepg,请移步http://ffmpeg.org 先了解下:) 编译ffmepg模拟器版本: 1. 到https://github.com/gabriel/ffmpeg-iphone-build下载ffmpeg-iphone-build 2.先将gas-prepr

    本文由论坛会员sun_t89分享

    如果不了解什么是ffmepg,请移步http://ffmpeg.org 先了解下:)

    编译ffmepg模拟器版本:
    1. 到https://github.com/gabriel/ffmpeg-iphone-build下载ffmpeg-iphone-build
    2.先将gas-preprocessor.pl拷贝到/usr/sbin/目录中。
    3.到ffmpeg官网上下载ffmpeg源码
    4.在终端下定位到ffmpeg的目录运行
    ./configure --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffserver --disable-avfilter --disable-debug --disable-encoders --enable-cross-compile --disable-decoders --disable-armv5te --enable-decoder=h264 --enable-pic --cc=/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc --as='gas-preprocessor/gas-preprocessor.pl /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc' --extra-ldflags=-L/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk/usr/lib/system --sysroot=/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk --target-os=darwin --arch=i386 --cpu=i386 --extra-cflags='-arch i386' --extra-ldflags='-arch i386'
    5.输入make命令
    6.将libavcodec.a,libavdevice.a,libavformat.a,libavutil.a,libswscale.a到对应的目录下拷贝出来。
    7.在项目中就可以使用了。可以参考开源示例iFrameExtractor (git clone git://github.com/lajos/iFrameExtractor.git)需要将该项目的ffmpeg文件夹库替换为你编译的 ffmpeg源码文件夹,在ffmpeg目录下新建lib目录,将刚刚拷贝出来的静态库拷贝进去。打开项目,添加libbz2.1.0.dylib系统库 文件。点击编译运行就可以使用了。
    8.注意如果使用的是ffmpeg0.8.5的库的话iFrameExtractor中的codec_type需要修改为AVMEDIA_TYPE_VIDEO。(下同)

     
    编译arm7版本,网上搜到的版本,完全按照以下步骤做就行了。可以编译出arm7的库。
    1. 下载:
    git clone git://github.com/lajos/iFrameExtractor.git
    2. 编辑:
    build_armv6和build_armv7,修改./configure后面的参数,主要是SDK版本.我的是4.3,修改为:
    ./configure --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffserver --enable-cross-compile --arch=arm --target-os=darwin --cc=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as='gas-preprocessor/gas-preprocessor.pl /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' --sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk --cpu=arm1176jzf-s --extra-cflags='-arch armv6' --extra-ldflags='-arch armv6'

    3. 编译:
    出错,提示:
    /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc is unable to create an executable file.
    C compiler test failed.
    查看config.err文件,最后提示:
    ld: file not found: /usr/lib/system/libcache.dylib for architecture armv7
    collect2: ld returned 1 exit status
    4. 重新修改configure参数为:
    ./configure --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffserver --enable-cross-compile --arch=arm --target-os=darwin --cc=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as='gas-preprocessor/gas-preprocessor.pl /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' --sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk --cpu=cortex-a8 --extra-cflags='-arch armv7' --extra-ldflags='-arch armv7 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk' --enable-pic
    5. 编译:
    build_armv7
    最后生成静态库,在lib目录和armv7目录.
    6.用xcode打开iFrameExtractor.xcodeproj,现在编译会出错,需要修改几个地方:
    左边选中工程,中间选中target,右面选中Build settings,在Architectures选项卡里面选择Architetures为Optimized(armv7),Base SDK为Latest iOS(iOS 4.3) Valid Architectures填写armv7.
    编译目标选择iOS Device,当然,如果有连接电脑的设备,可以选择设备.
    编译,提示:


    Undefined symbols for architecture armv7:
    "_BZ2_bzDecompressInit", referenced from:
    _matroska_decode_buffer in libavformat.a(matroskadec.o)
    "_BZ2_bzDecompressEnd", referenced from:
    _matroska_decode_buffer in libavformat.a(matroskadec.o)
    "_BZ2_bzDecompress", referenced from:
    _matroska_decode_buffer in libavformat.a(matroskadec.o)

    添加库libbz2.1.0.dylib,再次编译,OK通过

     

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  • 原文地址:https://www.cnblogs.com/yuanxiaoping_21cn_com/p/2483405.html
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