我尝试阅读很多教程。 我花了几个小时在谷歌和 stackoverflow 上尝试回答。 到目前为止我读过：尝试使用armv6和arv7架构为iPhoneOS平台编译FFMPEG库 FFMPEG 在 iphone/ ipad 项目上的集成 and https://github.com/lajos/iFrameExtractor众多中的少数。
我正在尝试构建此库以实现 iOS 7/Xcode 5 兼容性，但它不起作用。 我遇到的一个常见错误是：
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
yasm/nasm not found or too old. Use --disable-yasm for a crippled build.
If you think configure made a mistake, make sure you are using the latest
version from Git. If the latest version fails, report the problem to the
[email protected] mailing list or IRC #ffmpeg on irc.freenode.net.
Include the log file "config.log" produced by configure as this will help
solving the problem.
一旦完成，我还会得到更多。例如：
rm: illegal option -- .
usage: rm [-f | -i] [-dPRrvW] file ...
unlink file
make: *** [clean] Error 64
我主要尝试使用此命令来启动，但它总是在“make clean”时崩溃：
./configure \
--cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc \
--as='/usr/local/bin/gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' \
--sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk \
--target-os=darwin \
--arch=arm \
--cpu=cortex-a8 \
--extra-cflags='-arch armv7' \
--extra-ldflags='-arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk' \
--prefix=compiled/armv7 \
--enable-cross-compile \
--enable-nonfree \
--enable-gpl \
--disable-armv5te \
--disable-swscale-alpha \
--disable-doc \
--disable-ffmpeg \
--disable-ffplay \
--disable-ffprobe \
--disable-ffserver \
--disable-asm \
--disable-debug
要使用 Mooncatventures（我们的）ffmpegdecoderFramework，请进入构建设置 单击拱形并移除armv7s。
you must also change build active architechure only to no.