diff --git a/iOS资料/最简单的基于FFmpeg的移动端例子：IOS HelloWorld.md b/iOS资料/最简单的基于FFmpeg的移动端例子：IOS HelloWorld.md
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+# 最简单的基于FFmpeg的移动端例子：IOS HelloWorld
+
+本文记录IOS平台下基于FFmpeg的HelloWorld程序。该示例C语言的源代码来自于《最简单的基于FFMPEG的Helloworld程序》。相关的概念就不再重复记录了。
+
+![img](https://img-blog.csdn.net/20150801182605734)
+
+**IOS程序使用FFmpeg类库的说明**
+IOS应用程序使用FFmpeg类库的流程如下所示。
+
+# 1、编译FFmpeg类库
+
+编译IOS的FFmpeg类库需要支持5种架构：armv7、armv7s、arm64、i386、x86_64。其中前面3个是给真机使用的，后面2个是给模拟器使用的。本文记录的FFmpeg类库还支持第三方类库libx264和libfaac，所以在编译之前还要先编译libx264和libfaac的源代码。总体说来，IOS下的类库需要编译成两个版本：thin和fat。每种架构对应一个thin版本的类库，将这些不同架构thin版本的类库合成起来之后，就形成了fat版本的类库。下面简单记录一下编译步骤。编译过程中IOS SDK版本为8.3，FFmpeg版本为2.7.1，faac和x264分别使用了最新版本的源代码。
+
+### 1.1 第三方库libx264的编译
+
+这一步用于生成支持armv7、armv7s、arm64、i386、x86_64几种架构的fat版本的libx264.a。下面这个脚本可以首先编译生成上面5种架构的thin版本的libx264.a，分成5个文件夹存储于thin-x264文件夹中；然后将这些类库合并成为1个fat版本的libx264.a，存储于fat-x264文件夹中。
+
+#### 1.1.1 build_x264.sh
+
+```
+#!/bin/sh
+# LXH,MXY
+#
+# directories
+SOURCE="x264"
+FAT="fat-x264"
+
+SCRATCH="scratch-x264"
+# must be an absolute path
+THIN=`pwd`/"thin-x264"
+
+#This is decided by your SDK version.
+SDK_VERSION="8.3"
+
+cd ./x264
+
+#============== simulator ===============
+PLATFORM="iPhoneSimulator"
+
+#i386
+ARCHS="i386"
+
+export DEVROOT=/Applications/Xcode.app/Contents/Developer/Platforms/${PLATFORM}.platform/Developer
+export SDKROOT=$DEVROOT/SDKs/${PLATFORM}${SDK_VERSION}.sdk
+export CC=$DEVROOT/usr/bin/gcc
+export LD=$DEVROOT/usr/bin/ld
+export CXX=$DEVROOT/usr/bin/g++
+export LIBTOOL=$DEVROOT/usr/bin/libtool
+export HOST=i386-apple-darwin
+
+COMMONFLAGS="-pipe -gdwarf-2 -no-cpp-precomp -isysroot ${SDKROOT} -fPIC"
+export LDFLAGS="${COMMONFLAGS} -fPIC"
+export CFLAGS="${COMMONFLAGS} -fvisibility=hidden"
+
+
+for ARCH in $ARCHS; do
+
+echo "Building $ARCH ......"
+
+make clean
+./configure \
+--host=i386-apple-darwin \
+--sysroot=$SDKROOT \
+--prefix="$THIN/$ARCH" \
+--extra-cflags="-arch $ARCH -miphoneos-version-min=6.0" \
+--extra-ldflags="-L$SDKROOT/usr/lib/system -arch $ARCH -miphoneos-version-min=6.0" \
+--enable-pic \
+--enable-static \
+--disable-asm \
+make && make install && make clean
+
+echo "Installed: $DEST/$ARCH"
+done
+
+#x86_64
+
+ARCHS="x86_64"
+
+unset DEVROOT
+unset SDKROOT
+unset CC
+unset LD
+unset CXX
+unset LIBTOOL
+unset HOST
+unset LDFLAGS
+unset CFLAGS
+
+make clean
+for ARCH in $ARCHS; do
+
+echo "Building $ARCH ......"
+
+./configure \
+--prefix="$THIN/$ARCH" \
+--enable-pic \
+--enable-static \
+--disable-asm \
+make && make install && make clean
+
+echo "Installed: $DEST/$ARCH"
+done
+
+#================ iphone ==================
+
+export PLATFORM="iPhoneOS"
+
+ARCHS="arm64 armv7 armv7s "
+
+export DEVROOT=/Applications/Xcode.app/Contents/Developer
+export SDKROOT=$DEVROOT/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDK_VERSION}.sdk
+#DEVPATH=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${SDK_VERSION}.sdk
+export CC=$DEVROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
+export AS=$DEVROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/as
+COMMONFLAGS="-pipe -gdwarf-2 -no-cpp-precomp -isysroot ${SDKROOT} -marm -fPIC"
+export LDFLAGS="${COMMONFLAGS} -fPIC"
+export CFLAGS="${COMMONFLAGS} -fvisibility=hidden"
+export CXXFLAGS="${COMMONFLAGS} -fvisibility=hidden -fvisibility-inlines-hidden"
+
+
+for ARCH in $ARCHS; do
+
+echo "Building $ARCH ......"
+
+./configure \
+--host=arm-apple-darwin \
+--sysroot=$DEVPATH \
+--prefix="$THIN/$ARCH" \
+--extra-cflags="-arch $ARCH" \
+--extra-ldflags="-L$DEVPATH/usr/lib/system -arch $ARCH" \
+--enable-pic \
+--enable-static \
+--disable-asm
+
+make && make install && make clean
+
+echo "Installed: $DEST/$ARCH"
+
+done
+
+cd ..
+
+#================ fat lib ===================
+
+ARCHS="armv7 armv7s i386 x86_64 arm64"
+
+echo "building fat binaries..."
+mkdir -p $FAT/lib
+set - $ARCHS
+CWD=`pwd`
+cd $THIN/$1/lib
+for LIB in *.a
+do
+cd $CWD
+lipo -create `find $THIN -name $LIB` -output $FAT/lib/$LIB
+done
+
+cd $CWD
+cp -rf $THIN/$1/include $FAT
+```
+
+### 1.2 第三方库libfaac的编译
+
+这一步用于生成支持armv7、armv7s、arm64、i386、x86_64几种架构的fat版本的libfaac.a。下面这个脚本可以首先编译生成上面5种架构的thin版本的libfaac.a，分成5个文件夹存储于fat-faac中；然后将这些类库合并成为1个fat版本的libfaac.a，存储于fat-faac中。
+
+#### 1.2.1build_faac.sh
+
+```
+#!/bin/sh
+cd ./faac
+make distclean
+cd ..
+
+CONFIGURE_FLAGS="--enable-static --with-pic"
+
+ARCHS="arm64 armv7s x86_64 i386 armv7"
+
+# directories
+SOURCE="faac"
+FAT="fat-faac"
+
+SCRATCH="scratch-faac"
+# must be an absolute path
+THIN=`pwd`/"thin-faac"
+
+COMPILE="y"
+LIPO="y"
+
+if [ "$*" ]
+then
+if [ "$*" = "lipo" ]
+then
+# skip compile
+COMPILE=
+else
+ARCHS="$*"
+if [ $# -eq 1 ]
+then
+# skip lipo
+LIPO=
+fi
+fi
+fi
+
+if [ "$COMPILE" ]
+then
+CWD=`pwd`
+for ARCH in $ARCHS
+do
+echo "building $ARCH..."
+mkdir -p "$SCRATCH/$ARCH"
+cd "$SCRATCH/$ARCH"
+
+if [ "$ARCH" = "i386" -o "$ARCH" = "x86_64" ]
+then
+PLATFORM="iPhoneSimulator"
+CPU=
+if [ "$ARCH" = "x86_64" ]
+then
+SIMULATOR="-mios-simulator-version-min=7.0"
+HOST=
+else
+SIMULATOR="-mios-simulator-version-min=5.0"
+HOST="--host=i386-apple-darwin"
+fi
+else
+PLATFORM="iPhoneOS"
+if [ $ARCH = "armv7s" ]
+then
+CPU="--cpu=swift"
+else
+CPU=
+fi
+SIMULATOR=
+HOST="--host=arm-apple-darwin"
+fi
+
+XCRUN_SDK=`echo $PLATFORM | tr '[:upper:]' '[:lower:]'`
+CC="xcrun -sdk $XCRUN_SDK clang -Wno-error=unused-command-line-argument-hard-error-in-future"
+AS="/usr/local/bin/gas-preprocessor.pl $CC"
+CFLAGS="-arch $ARCH $SIMULATOR"
+CXXFLAGS="$CFLAGS"
+LDFLAGS="$CFLAGS"
+
+CC=$CC CFLAGS=$CXXFLAGS LDFLAGS=$LDFLAGS CPPFLAGS=$CXXFLAGS CXX=$CC CXXFLAGS=$CXXFLAGS  $CWD/$SOURCE/configure \
+$CONFIGURE_FLAGS \
+$HOST \
+--prefix="$THIN/$ARCH" \
+--disable-shared \
+--without-mp4v2
+
+make clean && make && make install-strip
+cd $CWD
+done
+fi
+
+#================ fat lib ===================
+
+echo "building fat binaries..."
+mkdir -p $FAT/lib
+set - $ARCHS
+CWD=`pwd`
+cd $THIN/$1/lib
+for LIB in *.a
+do
+cd $CWD
+lipo -create `find $THIN -name $LIB` -output $FAT/lib/$LIB
+done
+
+cd $CWD
+cp -rf $THIN/$1/include $FAT
+```
+
+### 1.3 编译armv7版本FFmpeg类库
+
+这一步用于生成支持armv7架构的thin版本的FFmpeg类库，存储于thin-ffmpeg/armv7文件夹中。脚本如下所示。
+
+#### 1.3.1 build_ffmpeg_demo_armv7.sh
+
+```
+#!/bin/sh
+# LXH,MXY modified
+
+cd ffmpeg
+
+PLATFORM="iPhoneOS"
+INSTALL="thin-ffmpeg"
+SDK_VERSION="8.3"
+
+# libx264
+export X264ROOT=../thin-x264/armv7
+export X264LIB=$X264ROOT/lib
+export X264INCLUDE=$X264ROOT/include
+# libfaac
+export FAACROOT=../thin-faac/armv7
+export FAACLIB=$FAACROOT/lib
+export FAACINCLUDE=$FAACROOT/include
+
+export DEVROOT=/Applications/Xcode.app/Contents/Developer
+
+export SDKROOT=$DEVROOT/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDK_VERSION}.sdk
+export CC=$DEVROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
+export AS=$DEVROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/as
+
+COMMONFLAGS="-pipe -gdwarf-2 -no-cpp-precomp -isysroot ${SDKROOT} -marm -fPIC"
+export LDFLAGS="${COMMONFLAGS} -fPIC"
+export CFLAGS="${COMMONFLAGS} -fvisibility=hidden"
+export CXXFLAGS="${COMMONFLAGS} -fvisibility=hidden -fvisibility-inlines-hidden"
+
+
+echo "Building armv7..."
+
+make clean
+./configure \
+    --cpu=cortex-a9 \
+    --extra-cflags='-I$X264INCLUDE -I$FAACINCLUDE -arch armv7 -miphoneos-version-min=5.0 -mthumb' \
+    --extra-ldflags='-L$X264LIB -L$FAACLIB -arch armv7 -miphoneos-version-min=5.0' \
+    --enable-cross-compile \
+    --arch=arm --disable-iconv\
+    --target-os=darwin \
+    --cc=${CC} --disable-asm\
+    --sysroot=${SDKROOT} \
+    --prefix=../${INSTALL}/armv7 \
+--enable-gpl --enable-nonfree --enable-version3 --disable-bzlib --enable-small --disable-vda \
+--disable-encoders --enable-libx264 --enable-libfaac --enable-encoder=libx264 --enable-encoder=libfaac \
+--disable-muxers --enable-muxer=flv --enable-muxer=mov --enable-muxer=ipod --enable-muxer=mpegts --enable-muxer=psp --enable-muxer=mp4 --enable-muxer=avi \
+--disable-decoders --enable-decoder=aac --enable-decoder=aac_latm --enable-decoder=h264 --enable-decoder=mpeg4 \
+--disable-demuxers --enable-demuxer=flv --enable-demuxer=h264 --enable-demuxer=mpegts --enable-demuxer=avi --enable-demuxer=mpc --enable-demuxer=mov \
+--disable-parsers --enable-parser=aac --enable-parser=ac3 --enable-parser=h264 \
+--disable-protocols --enable-protocol=file --enable-protocol=rtmp --enable-protocol=rtp --enable-protocol=udp \
+--disable-bsfs --enable-bsf=aac_adtstoasc --enable-bsf=h264_mp4toannexb \
+--disable-devices --disable-debug --disable-ffmpeg --disable-ffprobe --disable-ffplay --disable-ffserver --disable-debug
+
+make
+make install
+
+cd ..
+```
+
+### 1.4 编译armv7s版本FFmpeg类库
+
+这一步用于生成支持armv7s架构的thin版本的FFmpeg类库，存储于thin-ffmpeg/armv7s文件夹中。脚本如下所示。
+
+#### 1.4.1 build_ffmpeg_demo_armv7s.sh
+
+```
+#!/bin/sh
+# LXH,MXY modified
+
+cd ffmpeg
+
+PLATFORM="iPhoneOS"
+INSTALL="thin-ffmpeg"
+SDK_VERSION="8.3"
+
+# libx264
+export X264ROOT=../thin-x264/armv7s
+export X264LIB=$X264ROOT/lib
+export X264INCLUDE=$X264ROOT/include
+# libfaac
+export FAACROOT=../thin-faac/armv7s
+export FAACLIB=$FAACROOT/lib
+export FAACINCLUDE=$FAACROOT/include
+
+export DEVROOT=/Applications/Xcode.app/Contents/Developer
+
+export SDKROOT=$DEVROOT/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDK_VERSION}.sdk
+export CC=$DEVROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
+export AS=$DEVROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/as
+
+COMMONFLAGS="-pipe -gdwarf-2 -no-cpp-precomp -isysroot ${SDKROOT} -marm -fPIC"
+export LDFLAGS="${COMMONFLAGS} -fPIC"
+export CFLAGS="${COMMONFLAGS} -fvisibility=hidden"
+export CXXFLAGS="${COMMONFLAGS} -fvisibility=hidden -fvisibility-inlines-hidden"
+
+
+echo "Building armv7s..."
+
+make clean
+./configure \
+    --cpu=cortex-a9 \
+    --extra-cflags='-I$X264INCLUDE -I$FAACINCLUDE -arch armv7s -miphoneos-version-min=5.0 -mthumb' \
+    --extra-ldflags='-L$X264LIB -L$FAACLIB -arch armv7s -miphoneos-version-min=5.0' \
+    --enable-cross-compile \
+    --arch=arm --disable-iconv\
+    --target-os=darwin \
+    --cc=${CC} --disable-asm \
+    --sysroot=${SDKROOT} \
+    --prefix=../${INSTALL}/armv7s \
+--enable-gpl --enable-nonfree --enable-version3 --disable-bzlib --enable-small --disable-vda \
+ --disable-encoders --enable-libx264 --enable-libfaac --enable-encoder=libx264 --enable-encoder=libfaac \
+ --disable-muxers --enable-muxer=flv --enable-muxer=mov --enable-muxer=ipod --enable-muxer=mpegts --enable-muxer=psp --enable-muxer=mp4 --enable-muxer=avi \
+ --disable-decoders --enable-decoder=aac --enable-decoder=aac_latm --enable-decoder=h264 --enable-decoder=mpeg4 \
+ --disable-demuxers --enable-demuxer=flv --enable-demuxer=h264 --enable-demuxer=avi --enable-demuxer=mpegts --enable-demuxer=mpc --enable-demuxer=mov \
+ --disable-parsers --enable-parser=aac --enable-parser=ac3 --enable-parser=h264 \
+ --disable-protocols --enable-protocol=file --enable-protocol=rtmp --enable-protocol=rtp --enable-protocol=udp \
+ --disable-bsfs --enable-bsf=aac_adtstoasc --enable-bsf=h264_mp4toannexb \
+ --disable-devices --disable-debug --disable-ffmpeg --disable-ffprobe --disable-ffplay --disable-ffserver --disable-debug
+
+make
+make install
+
+cd ..
+```
+
+### 1.5 编译arm64版本FFmpeg类库
+
+这一步用于生成支持arm64架构的thin版本的FFmpeg类库，存储于thin-ffmpeg/arm64文件夹中。脚本如下所示。
+
+#### 1.5.1 build_ffmpeg_demo_arm64.sh
+
+```
+#!/bin/sh
+# LXH,MXY modified
+	
+cd ffmpeg
+
+PLATFORM="iPhoneOS"
+INSTALL="thin-ffmpeg"
+SDK_VERSION="8.3"
+
+# libx264
+export X264ROOT=../thin-x264/arm64
+export X264LIB=$X264ROOT/lib
+export X264INCLUDE=$X264ROOT/include
+# libfaac
+export FAACROOT=../thin-faac/arm64
+export FAACLIB=$FAACROOT/lib
+export FAACINCLUDE=$FAACROOT/include
+
+export DEVROOT=/Applications/Xcode.app/Contents/Developer
+
+export SDKROOT=$DEVROOT/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDK_VERSION}.sdk
+export CC=$DEVROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
+export AS=$DEVROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/as
+
+COMMONFLAGS="-pipe -gdwarf-2 -no-cpp-precomp -isysroot ${SDKROOT} -marm -fPIC"
+export LDFLAGS="${COMMONFLAGS} -fPIC"
+export CFLAGS="${COMMONFLAGS} -fvisibility=hidden"
+export CXXFLAGS="${COMMONFLAGS} -fvisibility=hidden -fvisibility-inlines-hidden"
+
+
+echo "Building arm64..."
+
+make clean
+./configure \
+    --extra-cflags='-I$X264INCLUDE -I$FAACINCLUDE -arch arm64 -miphoneos-version-min=5.0 -mthumb' \
+    --extra-ldflags='-L$X264LIB -L$FAACLIB -arch arm64 -miphoneos-version-min=5.0' \
+    --enable-cross-compile \
+    --arch=arm --disable-iconv \
+    --target-os=darwin \
+    --cc=${CC} --disable-asm \
+    --sysroot=${SDKROOT} \
+    --prefix=../${INSTALL}/arm64 \
+--enable-gpl --enable-nonfree --enable-version3 --disable-bzlib --enable-small --disable-vda \
+--disable-encoders --enable-libx264 --enable-libfaac --enable-encoder=libx264 --enable-encoder=libfaac \
+--disable-muxers --enable-muxer=flv --enable-muxer=mov --enable-muxer=ipod --enable-muxer=mpegts --enable-muxer=psp --enable-muxer=mp4 --enable-muxer=avi \
+--disable-decoders --enable-decoder=aac --enable-decoder=aac_latm --enable-decoder=h264 --enable-decoder=mpeg4 \
+--disable-demuxers --enable-demuxer=flv --enable-demuxer=h264 --enable-demuxer=avi --enable-demuxer=mpegts --enable-demuxer=mpc --enable-demuxer=mov \
+--disable-parsers --enable-parser=aac --enable-parser=ac3 --enable-parser=h264 \
+--disable-protocols --enable-protocol=file --enable-protocol=rtmp --enable-protocol=rtp --enable-protocol=udp \
+--disable-bsfs --enable-bsf=aac_adtstoasc --enable-bsf=h264_mp4toannexb \
+--disable-devices --disable-debug --disable-ffmpeg --disable-ffprobe --disable-ffplay --disable-ffserver --disable-debug
+
+make
+make install
+
+cd ..
+```
+
+### 1.6 编译i386版本FFmpeg类库
+
+这一步用于生成支持i386架构的thin版本的FFmpeg类库，存储于thin-ffmpeg/i386文件夹中。脚本如下所示。
+
+#### 1.6.1 build_ffmpeg_demo_i386.sh
+
+```
+build_ffmpeg_demo_i386.sh
+#!/bin/sh
+# LXH,MXY modified
+
+cd ffmpeg
+
+PLATFORM="iPhoneSimulator"
+INSTALL="thin-ffmpeg"
+SDK_VERSION="8.3"
+
+# libx264
+export X264ROOT=../thin-x264/i386
+export X264LIB=$X264ROOT/lib
+export X264INCLUDE=$X264ROOT/include
+# libfaac
+export FAACROOT=../thin-faac/i386
+export FAACLIB=$FAACROOT/lib
+export FAACINCLUDE=$FAACROOT/include
+
+export DEVROOT=/Applications/Xcode.app/Contents/Developer/Platforms/${PLATFORM}.platform/Developer
+export SDKROOT=$DEVROOT/SDKs/${PLATFORM}${SDK_VERSION}.sdk
+export CC=$DEVROOT/usr/bin/gcc
+export LD=$DEVROOT/usr/bin/ld
+
+export CXX=$DEVROOT/usr/bin/g++
+
+export LIBTOOL=$DEVROOT/usr/bin/libtool
+
+COMMONFLAGS="-pipe -gdwarf-2 -no-cpp-precomp -isysroot ${SDKROOT} -fPIC"
+export LDFLAGS="${COMMONFLAGS} -fPIC"
+export CFLAGS="${COMMONFLAGS} -fvisibility=hidden"
+
+
+echo "Building i386..."
+make clean
+./configure \
+    --cpu=i386 \
+    --extra-cflags='-I$X264INCLUDE -I$FAACINCLUDE -arch i386 -miphoneos-version-min=5.0' \
+    --extra-ldflags='-L$X264LIB -L$FAACLIB -arch i386 -miphoneos-version-min=5.0' \
+    --enable-cross-compile \
+    --arch=i386 --disable-iconv \
+    --target-os=darwin \
+    --cc=${CC} \
+    --sysroot=${SDKROOT} \
+--prefix=../${INSTALL}/i386 \
+--enable-gpl --enable-nonfree --enable-version3 --disable-bzlib --enable-small --disable-vda \
+--disable-encoders --enable-libx264 --enable-libfaac --enable-encoder=libx264 --enable-encoder=libfaac \
+--disable-muxers --enable-muxer=flv --enable-muxer=mov --enable-muxer=mpegts --enable-muxer=ipod --enable-muxer=psp --enable-muxer=mp4 --enable-muxer=avi \
+--disable-decoders --enable-decoder=aac --enable-decoder=aac_latm --enable-decoder=h264 --enable-decoder=mpeg4 \
+--disable-demuxers --enable-demuxer=flv --enable-demuxer=h264 --enable-demuxer=mpegts --enable-demuxer=avi --enable-demuxer=mpc --enable-demuxer=mov \
+--disable-parsers --enable-parser=aac --enable-parser=ac3 --enable-parser=h264 \
+--disable-protocols --enable-protocol=file --enable-protocol=rtmp --enable-protocol=rtp --enable-protocol=udp \
+--disable-bsfs --enable-bsf=aac_adtstoasc --enable-bsf=h264_mp4toannexb \
+--disable-devices --disable-debug --disable-ffmpeg --disable-ffprobe --disable-ffplay --disable-ffserver --disable-debug
+
+make
+make install
+
+cd ..
+```
+
+### 1.7 编译x86_64版本FFmpeg类库
+
+这一步用于生成支持x86_64架构的thin版本的FFmpeg类库，存储于thin-ffmpeg/x86_64文件夹中。脚本如下所示。
+
+#### 1.7.1 build_ffmpeg_demo_x86_64.sh
+
+```
+#!/bin/sh
+# LXH,MXY modified
+
+cd ./ffmpeg
+
+INSTALL="thin-ffmpeg"
+
+# libx264
+export X264ROOT=../thin-x264/x86_64
+export X264LIB=$X264ROOT/lib
+export X264INCLUDE=$X264ROOT/include
+# libfaac
+export FAACROOT=../thin-faac/x86_64
+export FAACLIB=$FAACROOT/lib
+export FAACINCLUDE=$FAACROOT/include
+
+unset DEVROOT
+unset SDKROOT
+unset CC
+unset LD
+unset CXX
+unset LIBTOOL
+unset HOST
+unset LDFLAGS
+unset CFLAGS
+
+echo "Building x86_64..."
+
+make clean
+./configure \
+    --extra-cflags='-I$X264INCLUDE -I$FAACINCLUDE' \
+    --extra-ldflags='-L$X264LIB -L$FAACLIB' \
+    --disable-iconv \
+    --disable-asm \
+--prefix=../${INSTALL}/x86_64 \
+--enable-gpl --enable-nonfree --enable-version3 --disable-bzlib --enable-small --disable-vda \
+--disable-encoders --enable-libx264 --enable-libfaac --enable-encoder=libx264 --enable-encoder=mpeg2video --enable-encoder=libfaac \
+--disable-muxers --enable-muxer=flv --enable-muxer=mov --enable-muxer=ipod --enable-muxer=mpegts --enable-muxer=psp --enable-muxer=mp4 --enable-muxer=avi \
+--disable-decoders --enable-decoder=aac --enable-decoder=mpeg2video --enable-decoder=aac_latm --enable-decoder=h264 --enable-decoder=mpeg4 \
+--disable-demuxers --enable-demuxer=flv --enable-demuxer=h264 --enable-demuxer=avi --enable-demuxer=mpegts --enable-demuxer=mpc --enable-demuxer=mov \
+--disable-parsers --enable-parser=aac --enable-parser=ac3 --enable-parser=h264 \
+--disable-protocols --enable-protocol=file --enable-protocol=rtmp --enable-protocol=rtp --enable-protocol=udp \
+--enable-bsf=aac_adtstoasc --enable-bsf=h264_mp4toannexb \
+--disable-devices --disable-debug --disable-ffmpeg --disable-ffprobe --disable-ffplay --disable-ffserver --disable-debug
+
+make
+make install
+cd ..
+```
+
+(8) 打包类库
+这一步用于将上述步骤中生成的5个版本的FFmpeg打包生成fat版本的FFmpeg类库。这一步骤执行完毕后，将thin-ffmpeg中几个thin版本的类库合并为一个fat版本的类库，并存储于fat-ffmpeg文件夹中。脚本如下所示。
+
+build_ffmpeg_fat.sh
+
+```
+#!/bin/sh
+
+
+# directories
+THIN=`pwd`/"thin-ffmpeg"
+FAT=`pwd`/"fat-ffmpeg"
+CWD=`pwd`
+# must be an absolute path
+
+
+ARCHS="armv7s i386 armv7 arm64 x86_64"
+
+
+echo "building fat binaries..."
+
+mkdir -p $FAT/lib
+set - $ARCHS
+cd thin-ffmpeg/$1/lib
+for LIB in *.a
+do
+cd $CWD
+lipo -create `find $THIN -name $LIB` -output $FAT/lib/$LIB
+done
+
+cd $CWD
+cp -rf $THIN/$1/include $FAT
+```
+
+生成完fat版本的类库后，可以在命令行使用lipo命令查看类库的架构，如下所示。
+
+```
+lipo -info libavcodec.a
+```
+
+2. 编写IOS程序
+   编写包含FFmpeg类库支持的IOS程序分成两步：配置Xcode环境，编写C语言代码。
+
+(1) 配置Xcode环境
+下面以Xcode的IOS中的Single View Application为例，记录一下配置步骤：
+
+(a) 拷贝头文件所在的include文件夹和fat版本的FFmpeg类库（包括libavformat.a， libavcodec.a， libavutil.a， libavdevice.a， libavfilter.a， libpostproc.a， libswresample.a， libswscale.a；以及第三方fat版本类库libx264.a， libfaac.a）至项目文件夹。并将它们添加至项目中。
+
+(b)  项目属性->Build Settings中配置以下3个选项。
+Linking->Other Linker Flags中添加下面内容：
+
+```
+-lavformat
+-lavcodec
+-lavutil
+-lavdevice
+-lavfilter
+-lpostproc
+-lswresample
+-lswscale
+-lx264
+-lfaac
+```
+
+Search Paths->Header Search Paths添加下面内容
+
+```
+$(PROJECT_DIR)/include
+```
+
+Search Paths->Library Search Paths添加下面内容
+
+```
+$(PROJECT_DIR)
+```
+
+其它的一些配置。这些配置随着FFmpeg版本的不同而有略微的不同（在某些情况下也可能不需要配置）。我目前使用的2.7.1版本的FFmpeg需要配置下面的选项。
+项目属性->General->Linked Frameworks and Libraries中添加两个类库：AVFoundation.framework和libz.dylib。
+(2) 编写C语言代码
+做好上面配置后，就可以在项目中编写代码测试一下FFmpeg是否正确配置了。由于IOS使用的Objective-C是兼容C语言的，所以可以直接写C语言代码调用FFmpeg。可以在ViewController.m中的viewDidLoad()函数中添加一行printf()代码打印FFmpeg类库的版本信息，如下所示。
+
+```
+#import "ViewController.h"
+#include <libavcodec/avcodec.h>
+ 
+@interface ViewController ()
+ 
+@end
+ 
+@implementation ViewController
+ 
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    // Do any additional setup after loading the view, typically from a nib.
+    printf("%s",avcodec_configuration());
+}
+ 
+- (void)didReceiveMemoryWarning {
+    [super didReceiveMemoryWarning];
+    // Dispose of any resources that can be recreated.
+}
+ 
+@end
+```
+
+如果类库编译无误，启动IOS程序的时候会在控制台打印版本信息。
+
+## 2、源代码
+
+项目的目录结构如图所示。
+
+![img](https://img-blog.csdn.net/20150726212805864)
+
+C代码位于ViewController.m文件中，内容如下所示。
+
+```
+/**
+ * 最简单的基于FFmpeg的HelloWorld程序 － IOS
+ * Simplest FFmpeg Helloworld － IOS
+ *
+ * 雷霄骅 Lei Xiaohua
+ * leixiaohua1020@126.com
+ * 中国传媒大学/数字电视技术
+ * Communication University of China / Digital TV Technology
+ * http://blog.csdn.net/leixiaohua1020
+ *
+ * 本程序可以获得FFmpeg类库相关的信息。
+ * This software can get information about FFmpeg libraries.
+ *
+ */
+ 
+#import "ViewController.h"
+#include <libavcodec/avcodec.h>
+#include <libavformat/avformat.h>
+#include <libavfilter/avfilter.h>
+ 
+@interface ViewController ()
+ 
+@end
+ 
+@implementation ViewController
+ 
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    // Do any additional setup after loading the view, typically from a nib.
+    
+    av_register_all();
+    char info[10000] = { 0 };
+    printf("%s\n", avcodec_configuration());
+    sprintf(info, "%s\n", avcodec_configuration());
+    NSString * info_ns = [NSString stringWithFormat:@"%s", info];
+    self.content.text=info_ns;
+}
+ 
+ 
+- (void)didReceiveMemoryWarning {
+    [super didReceiveMemoryWarning];
+    // Dispose of any resources that can be recreated.
+}
+ 
+- (IBAction)clickProtocolButton:(id)sender {
+    //Alert
+    /*
+    UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"Title" message:@"This is content" delegate:nil cancelButtonTitle:@"Close" otherButtonTitles:nil];
+    [alter show];
+     */
+    char info[40000]={0};
+    av_register_all();
+    
+    struct URLProtocol *pup = NULL;
+    //Input
+    struct URLProtocol **p_temp = &pup;
+    avio_enum_protocols((void **)p_temp, 0);
+    while ((*p_temp) != NULL){
+        sprintf(info, "%s[In ][%10s]\n", info, avio_enum_protocols((void **)p_temp, 0));
+    }
+    pup = NULL;
+    //Output
+    avio_enum_protocols((void **)p_temp, 1);
+    while ((*p_temp) != NULL){
+        sprintf(info, "%s[Out][%10s]\n", info, avio_enum_protocols((void **)p_temp, 1));
+    }
+    //printf("%s", info);
+    NSString * info_ns = [NSString stringWithFormat:@"%s", info];
+    self.content.text=info_ns;
+}
+ 
+- (IBAction)clickAVFormatButton:(id)sender {
+    char info[40000] = { 0 };
+    
+    av_register_all();
+    
+    AVInputFormat *if_temp = av_iformat_next(NULL);
+    AVOutputFormat *of_temp = av_oformat_next(NULL);
+    //Input
+    while(if_temp!=NULL){
+        sprintf(info, "%s[In ]%10s\n", info, if_temp->name);
+        if_temp=if_temp->next;
+    }
+    //Output
+    while (of_temp != NULL){
+        sprintf(info, "%s[Out]%10s\n", info, of_temp->name);
+        of_temp = of_temp->next;
+    }
+    //printf("%s", info);
+    NSString * info_ns = [NSString stringWithFormat:@"%s", info];
+    self.content.text=info_ns;
+}
+ 
+ 
+- (IBAction)clickAVCodecButton:(id)sender {
+    
+    char info[40000] = { 0 };
+    
+    av_register_all();
+    
+    AVCodec *c_temp = av_codec_next(NULL);
+    
+    while(c_temp!=NULL){
+        if (c_temp->decode!=NULL){
+            sprintf(info, "%s[Dec]", info);
+        }
+        else{
+            sprintf(info, "%s[Enc]", info);
+        }
+        switch (c_temp->type){
+            case AVMEDIA_TYPE_VIDEO:
+                sprintf(info, "%s[Video]", info);
+                break;
+            case AVMEDIA_TYPE_AUDIO:
+                sprintf(info, "%s[Audio]", info);
+                break;
+            default:
+                sprintf(info, "%s[Other]", info);
+                break;
+        }
+        sprintf(info, "%s%10s\n", info, c_temp->name);
+        
+        
+        c_temp=c_temp->next;
+    }
+    //printf("%s", info);
+    NSString * info_ns = [NSString stringWithFormat:@"%s", info];
+    self.content.text=info_ns;
+}
+ 
+- (IBAction)clickAVFilterButton:(id)sender {
+    char info[40000] = { 0 };
+    avfilter_register_all();
+    AVFilter *f_temp = (AVFilter *)avfilter_next(NULL);
+    while (f_temp != NULL){
+        sprintf(info, "%s[%10s]\n", info, f_temp->name);
+    }
+    //printf("%s", info);
+    NSString * info_ns = [NSString stringWithFormat:@"%s", info];
+    self.content.text=info_ns;
+}
+ 
+- (IBAction)clickConfigurationButton:(id)sender {
+    char info[10000] = { 0 };
+    av_register_all();
+    
+    sprintf(info, "%s\n", avcodec_configuration());
+    
+    //printf("%s", info);
+    //self.content.text=@"Lei Xiaohua";
+    NSString * info_ns = [NSString stringWithFormat:@"%s", info];
+    self.content.text=info_ns;
+}
+ 
+ 
+@end
+```
+
+## 3、运行结果
+
+App在手机上运行后的结果如下图所示。
+
+![img](https://img-blog.csdn.net/20150726212715269)
+
+单击不同的按钮，可以得到类库不同方面的信息。单击“Protocol”按钮内容如下所示。
+
+![img](https://img-blog.csdn.net/20150726212728045)
+
+单击“AVFormat”按钮内容如下所示。
+
+![img](https://img-blog.csdn.net/20150726212855691)
+
+单击“AVCodec”按钮内容如下所示。
+
+![img](https://img-blog.csdn.net/20150726212930214)
+
+单击“Configure”按钮即为程序开始运行时候的内容。
+
+## 4、下载
+
+**simplest ffmpeg mobile**
+
+**项目主页**
+
+Github：https://github.com/leixiaohua1020/simplest_ffmpeg_mobile
+
+开源中国：https://git.oschina.net/leixiaohua1020/simplest_ffmpeg_mobile
+
+SourceForge：https://sourceforge.net/projects/simplestffmpegmobile/
+
+
+
+CSDN工程下载地址： http://download.csdn.net/detail/leixiaohua1020/8924391
+
+本解决方案包含了使用FFmpeg在移动端处理多媒体的各种例子：
+
+> [Android]
+> simplest_android_player: 基于安卓接口的视频播放器
+> simplest_ffmpeg_android_helloworld: 安卓平台下基于FFmpeg的HelloWorld程序
+> simplest_ffmpeg_android_decoder: 安卓平台下最简单的基于FFmpeg的视频解码器
+> simplest_ffmpeg_android_decoder_onelib: 安卓平台下最简单的基于FFmpeg的视频解码器-单库版
+> simplest_ffmpeg_android_streamer: 安卓平台下最简单的基于FFmpeg的推流器
+> simplest_ffmpeg_android_transcoder: 安卓平台下移植的FFmpeg命令行工具
+> simplest_sdl_android_helloworld: 移植SDL到安卓平台的最简单程序
+> [IOS]
+> simplest_ios_player: 基于IOS接口的视频播放器
+> simplest_ffmpeg_ios_helloworld: IOS平台下基于FFmpeg的HelloWorld程序
+> simplest_ffmpeg_ios_decoder: IOS平台下最简单的基于FFmpeg的视频解码器
+> simplest_ffmpeg_ios_streamer: IOS平台下最简单的基于FFmpeg的推流器
+> simplest_ffmpeg_ios_transcoder: IOS平台下移植的ffmpeg.c命令行工具
+> simplest_sdl_ios_helloworld: 移植SDL到IOS平台的最简单程序
+
+
+
+原文链接：https://blog.csdn.net/leixiaohua1020/article/details/47071547
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