织梦CMS - 轻松建站从此开始!

罗索实验室

iPhone下编译ffmpeg

落鹤生 发布于 2010-12-21 13:55 点击:次 
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.
TAG:

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/

how to install?

you need to open folders in usr dir called local and then bin then in bin put gas-preprocessor.pl file.

then try the configure command.

Note: by default usr dir which is in root level is hidden, you need to right click on finder icon, select "Go to Folder" then type /usr and enter to reveal usr directory.


3. Get the latest FFmpeg from SVN (minimum r20151). http://www.ffmpeg.org
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

文本编辑器打开configure文件, 根据需要修改

./configure --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-avdevice --disable-avcore --disable-avformat --disable-swscale --disable-decoders --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/iPhoneOS4.1.sdk --cpu=cortex-a8 --extra-cflags='-arch armv7' --extra-ldflags='-arch armv7' --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. 

注:路径名有空格编译会出错

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.

参考资料:

转自:http://blog.csdn.net/tozheng/archive/2010/11/10/6000974.aspx

(tozheng)
本站文章除注明转载外,均为本站原创或编译欢迎任何形式的转载,但请务必注明出处,尊重他人劳动,同学习共成长。转载请注明:文章转载自:罗索实验室 [http://www1.rosoo.net/a/201012/10627.html]
本文出处:CSDN博客 作者:tozheng
顶一下
(0)
0%
踩一下
(0)
0%
------分隔线----------------------------
发表评论
请自觉遵守互联网相关的政策法规,严禁发布色情、暴力、反动的言论。
评价:
表情:
用户名: 验证码:点击我更换图片
栏目列表
将本文分享到微信
织梦二维码生成器
推荐内容