FFMPEG iOS 7库

Question

我试着读了很多教程。我花了几个小时在google上，stackoverflow尝试回答。到目前为止，我已经读到了：Trying to compile the FFMPEG libraries for iPhoneOS platform with armv6 and arv7 architecture，FFMPEG integration on iphone/ ipad project和https://github.com/lajos/iFrameExtractor中的一小部分。

我试图构建这个兼容iOS 7/Xcode5的库，但它不起作用。我得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
ffmpeg-user@ffmpeg.org 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

我主要尝试使用这个命令来启动，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

Answer 1

要使用mooncatventures (our) ffmpegdecoderFramework，请进入构建设置，单击拱门并删除armv7s。

您还必须将build active architechure only更改为no。

​

Answer 2

米恩图斯的回答对我很有效：https://stackoverflow.com/a/19370679/661720

支持用于iOS7和XCode5通用ffmpeg库：

安装gas预处理器

单击ZIP图标下载https://github.com/mansr/gas-preprocessor。将gas-preprocessor.pl复制到/usr/bin目录。更改gas-preprocessor.pl的权限，将所有权限都设置为读写权限。

从https://gist.github.com/m1entus/6983547下载我的shell脚本

运行sh build-ffmpeg.sh.