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  • Building FFmpeg for iPhone


    原此出处:http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2009-October/076618.html
    I am pleased to announce that FFmpeg can now be built unpatched for
    the iPhone. The process is still not entirely without pain, however.
    Here’s how it’s done:

    1. Download and install the iPhone SDK 3.1.
    2. Get the latest gas-preprocessor and install it in /usr/local/bin
    or some other directory in your $PATH.
    http://github.com/yuvi/gas-preprocessor/
    3. Get the latest FFmpeg from SVN (minimum r20151).
    4. Configure FFmpeg with one of the following commands. These give a
    clean build with a default installation of iPhone SDK 3.1 on OSX Leopard.
    Other versions may vary.
    4a. For iPhone 3GS or iPod Touch 3G 32GB/64GB, use this command:
    ./configure –cc=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin9-gcc-4.2.1 –as=’gas-preprocessor.pl /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin9-gcc-4.2.1′ –sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.1.sdk –enable-cross-compile –target-os=darwin –arch=arm –cpu=cortex-a8 –enable-pic
    4b. For other iPhone or iPod Touch models, use this command:
    ./configure –cc=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin9-gcc-4.2.1 –as=’gas-preprocessor.pl /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin9-gcc-4.2.1′ –sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.1.sdk –enable-cross-compile –target-os=darwin –arch=arm –cpu=arm1176jzf-s
    5. Run make.

    It is important to specify a correct –cpu option, and not merely an
    architecture version. Failure to specify the exact CPU will give a
    broken build.

    For the iPhone 3GS and compatible iPods, –enable-pic is required to
    avoid some nasty-looking linker warnings about relocations.

    I have not tested the builds on an iPhone/iPod, so there may still be
    remaining issues. Please report any problems you encounter.

    Many thanks to David Conrad for the gas-preprocessor script, without
    which this would not be possible.

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  • 原文地址:https://www.cnblogs.com/qq78292959/p/2076978.html
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