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# 最简单的基于FFmpeg的移动端例子：IOS HelloWorld |
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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。 |
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 |
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**IOS程序使用FFmpeg类库的说明** |
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IOS应用程序使用FFmpeg类库的流程如下所示。 |
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# 1、编译FFmpeg类库 |
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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。 |
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### 1.1 第三方库libx264的编译 |
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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。 |
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#### 1.1.1 build_x264.sh |
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``` |
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#!/bin/sh |
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# LXH,MXY |
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# |
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# directories |
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SOURCE="x264" |
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FAT="fat-x264" |
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SCRATCH="scratch-x264" |
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# must be an absolute path |
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THIN=`pwd`/"thin-x264" |
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#This is decided by your SDK version. |
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SDK_VERSION="8.3" |
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cd ./x264 |
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#============== simulator =============== |
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PLATFORM="iPhoneSimulator" |
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#i386 |
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ARCHS="i386" |
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export DEVROOT=/Applications/Xcode.app/Contents/Developer/Platforms/${PLATFORM}.platform/Developer |
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export SDKROOT=$DEVROOT/SDKs/${PLATFORM}${SDK_VERSION}.sdk |
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export CC=$DEVROOT/usr/bin/gcc |
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export LD=$DEVROOT/usr/bin/ld |
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export CXX=$DEVROOT/usr/bin/g++ |
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export LIBTOOL=$DEVROOT/usr/bin/libtool |
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export HOST=i386-apple-darwin |
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COMMONFLAGS="-pipe -gdwarf-2 -no-cpp-precomp -isysroot ${SDKROOT} -fPIC" |
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export LDFLAGS="${COMMONFLAGS} -fPIC" |
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export CFLAGS="${COMMONFLAGS} -fvisibility=hidden" |
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for ARCH in $ARCHS; do |
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echo "Building $ARCH ......" |
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make clean |
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./configure \ |
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--host=i386-apple-darwin \ |
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--sysroot=$SDKROOT \ |
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--prefix="$THIN/$ARCH" \ |
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--extra-cflags="-arch $ARCH -miphoneos-version-min=6.0" \ |
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--extra-ldflags="-L$SDKROOT/usr/lib/system -arch $ARCH -miphoneos-version-min=6.0" \ |
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--enable-pic \ |
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--enable-static \ |
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--disable-asm \ |
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make && make install && make clean |
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echo "Installed: $DEST/$ARCH" |
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done |
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#x86_64 |
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ARCHS="x86_64" |
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unset DEVROOT |
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unset SDKROOT |
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unset CC |
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unset LD |
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unset CXX |
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unset LIBTOOL |
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unset HOST |
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unset LDFLAGS |
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unset CFLAGS |
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make clean |
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for ARCH in $ARCHS; do |
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echo "Building $ARCH ......" |
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./configure \ |
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--prefix="$THIN/$ARCH" \ |
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--enable-pic \ |
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--enable-static \ |
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--disable-asm \ |
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make && make install && make clean |
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echo "Installed: $DEST/$ARCH" |
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done |
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#================ iphone ================== |
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export PLATFORM="iPhoneOS" |
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ARCHS="arm64 armv7 armv7s " |
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export DEVROOT=/Applications/Xcode.app/Contents/Developer |
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export SDKROOT=$DEVROOT/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDK_VERSION}.sdk |
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#DEVPATH=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${SDK_VERSION}.sdk |
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export CC=$DEVROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang |
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export AS=$DEVROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/as |
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COMMONFLAGS="-pipe -gdwarf-2 -no-cpp-precomp -isysroot ${SDKROOT} -marm -fPIC" |
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export LDFLAGS="${COMMONFLAGS} -fPIC" |
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export CFLAGS="${COMMONFLAGS} -fvisibility=hidden" |
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export CXXFLAGS="${COMMONFLAGS} -fvisibility=hidden -fvisibility-inlines-hidden" |
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for ARCH in $ARCHS; do |
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echo "Building $ARCH ......" |
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./configure \ |
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--host=arm-apple-darwin \ |
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--sysroot=$DEVPATH \ |
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--prefix="$THIN/$ARCH" \ |
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--extra-cflags="-arch $ARCH" \ |
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--extra-ldflags="-L$DEVPATH/usr/lib/system -arch $ARCH" \ |
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--enable-pic \ |
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--enable-static \ |
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--disable-asm |
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make && make install && make clean |
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echo "Installed: $DEST/$ARCH" |
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done |
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cd .. |
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#================ fat lib =================== |
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ARCHS="armv7 armv7s i386 x86_64 arm64" |
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echo "building fat binaries..." |
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mkdir -p $FAT/lib |
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set - $ARCHS |
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CWD=`pwd` |
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cd $THIN/$1/lib |
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for LIB in *.a |
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do |
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cd $CWD |
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lipo -create `find $THIN -name $LIB` -output $FAT/lib/$LIB |
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done |
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cd $CWD |
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cp -rf $THIN/$1/include $FAT |
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``` |
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### 1.2 第三方库libfaac的编译 |
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这一步用于生成支持armv7、armv7s、arm64、i386、x86_64几种架构的fat版本的libfaac.a。下面这个脚本可以首先编译生成上面5种架构的thin版本的libfaac.a，分成5个文件夹存储于fat-faac中；然后将这些类库合并成为1个fat版本的libfaac.a，存储于fat-faac中。 |
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#### 1.2.1build_faac.sh |
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``` |
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#!/bin/sh |
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cd ./faac |
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make distclean |
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cd .. |
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CONFIGURE_FLAGS="--enable-static --with-pic" |
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ARCHS="arm64 armv7s x86_64 i386 armv7" |
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# directories |
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SOURCE="faac" |
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FAT="fat-faac" |
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SCRATCH="scratch-faac" |
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# must be an absolute path |
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THIN=`pwd`/"thin-faac" |
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COMPILE="y" |
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LIPO="y" |
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if [ "$*" ] |
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then |
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if [ "$*" = "lipo" ] |
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then |
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# skip compile |
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COMPILE= |
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else |
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ARCHS="$*" |
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if [ $# -eq 1 ] |
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then |
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# skip lipo |
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LIPO= |
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fi |
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fi |
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fi |
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if [ "$COMPILE" ] |
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then |
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CWD=`pwd` |
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for ARCH in $ARCHS |
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do |
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echo "building $ARCH..." |
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mkdir -p "$SCRATCH/$ARCH" |
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cd "$SCRATCH/$ARCH" |
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if [ "$ARCH" = "i386" -o "$ARCH" = "x86_64" ] |
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then |
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PLATFORM="iPhoneSimulator" |
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CPU= |
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if [ "$ARCH" = "x86_64" ] |
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then |
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SIMULATOR="-mios-simulator-version-min=7.0" |
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HOST= |
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else |
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SIMULATOR="-mios-simulator-version-min=5.0" |
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HOST="--host=i386-apple-darwin" |
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fi |
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else |
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PLATFORM="iPhoneOS" |
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if [ $ARCH = "armv7s" ] |
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then |
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CPU="--cpu=swift" |
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else |
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CPU= |
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fi |
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SIMULATOR= |
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HOST="--host=arm-apple-darwin" |
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fi |
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XCRUN_SDK=`echo $PLATFORM | tr '[:upper:]' '[:lower:]'` |
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CC="xcrun -sdk $XCRUN_SDK clang -Wno-error=unused-command-line-argument-hard-error-in-future" |
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AS="/usr/local/bin/gas-preprocessor.pl $CC" |
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CFLAGS="-arch $ARCH $SIMULATOR" |
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CXXFLAGS="$CFLAGS" |
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LDFLAGS="$CFLAGS" |
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CC=$CC CFLAGS=$CXXFLAGS LDFLAGS=$LDFLAGS CPPFLAGS=$CXXFLAGS CXX=$CC CXXFLAGS=$CXXFLAGS $CWD/$SOURCE/configure \ |
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$CONFIGURE_FLAGS \ |
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$HOST \ |
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--prefix="$THIN/$ARCH" \ |
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--disable-shared \ |
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--without-mp4v2 |
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make clean && make && make install-strip |
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cd $CWD |
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done |
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fi |
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#================ fat lib =================== |
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echo "building fat binaries..." |
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mkdir -p $FAT/lib |
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set - $ARCHS |
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CWD=`pwd` |
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cd $THIN/$1/lib |
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for LIB in *.a |
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do |
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cd $CWD |
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lipo -create `find $THIN -name $LIB` -output $FAT/lib/$LIB |
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done |
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cd $CWD |
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cp -rf $THIN/$1/include $FAT |
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``` |
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### 1.3 编译armv7版本FFmpeg类库 |
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这一步用于生成支持armv7架构的thin版本的FFmpeg类库，存储于thin-ffmpeg/armv7文件夹中。脚本如下所示。 |
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#### 1.3.1 build_ffmpeg_demo_armv7.sh |
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``` |
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#!/bin/sh |
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# LXH,MXY modified |
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cd ffmpeg |
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PLATFORM="iPhoneOS" |
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INSTALL="thin-ffmpeg" |
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SDK_VERSION="8.3" |
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# libx264 |
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export X264ROOT=../thin-x264/armv7 |
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export X264LIB=$X264ROOT/lib |
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export X264INCLUDE=$X264ROOT/include |
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# libfaac |
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export FAACROOT=../thin-faac/armv7 |
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export FAACLIB=$FAACROOT/lib |
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export FAACINCLUDE=$FAACROOT/include |
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export DEVROOT=/Applications/Xcode.app/Contents/Developer |
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export SDKROOT=$DEVROOT/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDK_VERSION}.sdk |
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export CC=$DEVROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang |
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export AS=$DEVROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/as |
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COMMONFLAGS="-pipe -gdwarf-2 -no-cpp-precomp -isysroot ${SDKROOT} -marm -fPIC" |
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export LDFLAGS="${COMMONFLAGS} -fPIC" |
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export CFLAGS="${COMMONFLAGS} -fvisibility=hidden" |
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export CXXFLAGS="${COMMONFLAGS} -fvisibility=hidden -fvisibility-inlines-hidden" |
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echo "Building armv7..." |
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make clean |
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./configure \ |
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--cpu=cortex-a9 \ |
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--extra-cflags='-I$X264INCLUDE -I$FAACINCLUDE -arch armv7 -miphoneos-version-min=5.0 -mthumb' \ |
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--extra-ldflags='-L$X264LIB -L$FAACLIB -arch armv7 -miphoneos-version-min=5.0' \ |
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--enable-cross-compile \ |
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--arch=arm --disable-iconv\ |
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--target-os=darwin \ |
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--cc=${CC} --disable-asm\ |
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--sysroot=${SDKROOT} \ |
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--prefix=../${INSTALL}/armv7 \ |
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--enable-gpl --enable-nonfree --enable-version3 --disable-bzlib --enable-small --disable-vda \ |
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--disable-encoders --enable-libx264 --enable-libfaac --enable-encoder=libx264 --enable-encoder=libfaac \ |
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--disable-muxers --enable-muxer=flv --enable-muxer=mov --enable-muxer=ipod --enable-muxer=mpegts --enable-muxer=psp --enable-muxer=mp4 --enable-muxer=avi \ |
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--disable-decoders --enable-decoder=aac --enable-decoder=aac_latm --enable-decoder=h264 --enable-decoder=mpeg4 \ |
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--disable-demuxers --enable-demuxer=flv --enable-demuxer=h264 --enable-demuxer=mpegts --enable-demuxer=avi --enable-demuxer=mpc --enable-demuxer=mov \ |
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--disable-parsers --enable-parser=aac --enable-parser=ac3 --enable-parser=h264 \ |
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--disable-protocols --enable-protocol=file --enable-protocol=rtmp --enable-protocol=rtp --enable-protocol=udp \ |
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--disable-bsfs --enable-bsf=aac_adtstoasc --enable-bsf=h264_mp4toannexb \ |
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--disable-devices --disable-debug --disable-ffmpeg --disable-ffprobe --disable-ffplay --disable-ffserver --disable-debug |
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make |
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make install |
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cd .. |
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``` |
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### 1.4 编译armv7s版本FFmpeg类库 |
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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。 |
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#### 1.4.1 build_ffmpeg_demo_armv7s.sh |
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``` |
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#!/bin/sh |
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# LXH,MXY modified |
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cd ffmpeg |
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PLATFORM="iPhoneOS" |
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INSTALL="thin-ffmpeg" |
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SDK_VERSION="8.3" |
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# libx264 |
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export X264ROOT=../thin-x264/armv7s |
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export X264LIB=$X264ROOT/lib |
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export X264INCLUDE=$X264ROOT/include |
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# libfaac |
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export FAACROOT=../thin-faac/armv7s |
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export FAACLIB=$FAACROOT/lib |
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export FAACINCLUDE=$FAACROOT/include |
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export DEVROOT=/Applications/Xcode.app/Contents/Developer |
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export SDKROOT=$DEVROOT/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDK_VERSION}.sdk |
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export CC=$DEVROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang |
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export AS=$DEVROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/as |
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COMMONFLAGS="-pipe -gdwarf-2 -no-cpp-precomp -isysroot ${SDKROOT} -marm -fPIC" |
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export LDFLAGS="${COMMONFLAGS} -fPIC" |
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export CFLAGS="${COMMONFLAGS} -fvisibility=hidden" |
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export CXXFLAGS="${COMMONFLAGS} -fvisibility=hidden -fvisibility-inlines-hidden" |
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echo "Building armv7s..." |
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make clean |
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./configure \ |
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--cpu=cortex-a9 \ |
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--extra-cflags='-I$X264INCLUDE -I$FAACINCLUDE -arch armv7s -miphoneos-version-min=5.0 -mthumb' \ |
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--extra-ldflags='-L$X264LIB -L$FAACLIB -arch armv7s -miphoneos-version-min=5.0' \ |
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--enable-cross-compile \ |
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--arch=arm --disable-iconv\ |
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--target-os=darwin \ |
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--cc=${CC} --disable-asm \ |
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--sysroot=${SDKROOT} \ |
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--prefix=../${INSTALL}/armv7s \ |
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--enable-gpl --enable-nonfree --enable-version3 --disable-bzlib --enable-small --disable-vda \ |
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--disable-encoders --enable-libx264 --enable-libfaac --enable-encoder=libx264 --enable-encoder=libfaac \ |
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--disable-muxers --enable-muxer=flv --enable-muxer=mov --enable-muxer=ipod --enable-muxer=mpegts --enable-muxer=psp --enable-muxer=mp4 --enable-muxer=avi \ |
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--disable-decoders --enable-decoder=aac --enable-decoder=aac_latm --enable-decoder=h264 --enable-decoder=mpeg4 \ |
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--disable-demuxers --enable-demuxer=flv --enable-demuxer=h264 --enable-demuxer=avi --enable-demuxer=mpegts --enable-demuxer=mpc --enable-demuxer=mov \ |
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--disable-parsers --enable-parser=aac --enable-parser=ac3 --enable-parser=h264 \ |
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--disable-protocols --enable-protocol=file --enable-protocol=rtmp --enable-protocol=rtp --enable-protocol=udp \ |
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--disable-bsfs --enable-bsf=aac_adtstoasc --enable-bsf=h264_mp4toannexb \ |
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--disable-devices --disable-debug --disable-ffmpeg --disable-ffprobe --disable-ffplay --disable-ffserver --disable-debug |
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make |
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make install |
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cd .. |
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``` |
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### 1.5 编译arm64版本FFmpeg类库 |
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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。 |
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#### 1.5.1 build_ffmpeg_demo_arm64.sh |
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``` |
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#!/bin/sh |
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# LXH,MXY modified |
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cd ffmpeg |
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PLATFORM="iPhoneOS" |
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INSTALL="thin-ffmpeg" |
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SDK_VERSION="8.3" |
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# libx264 |
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export X264ROOT=../thin-x264/arm64 |
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export X264LIB=$X264ROOT/lib |
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export X264INCLUDE=$X264ROOT/include |
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# libfaac |
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export FAACROOT=../thin-faac/arm64 |
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export FAACLIB=$FAACROOT/lib |
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export FAACINCLUDE=$FAACROOT/include |
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export DEVROOT=/Applications/Xcode.app/Contents/Developer |
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export SDKROOT=$DEVROOT/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDK_VERSION}.sdk |
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export CC=$DEVROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang |
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export AS=$DEVROOT/Toolchains/XcodeDefault.xctoolchain/usr/bin/as |
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|
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COMMONFLAGS="-pipe -gdwarf-2 -no-cpp-precomp -isysroot ${SDKROOT} -marm -fPIC" |
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export LDFLAGS="${COMMONFLAGS} -fPIC" |
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export CFLAGS="${COMMONFLAGS} -fvisibility=hidden" |
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export CXXFLAGS="${COMMONFLAGS} -fvisibility=hidden -fvisibility-inlines-hidden" |
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echo "Building arm64..." |
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make clean |
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./configure \ |
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--extra-cflags='-I$X264INCLUDE -I$FAACINCLUDE -arch arm64 -miphoneos-version-min=5.0 -mthumb' \ |
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--extra-ldflags='-L$X264LIB -L$FAACLIB -arch arm64 -miphoneos-version-min=5.0' \ |
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--enable-cross-compile \ |
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--arch=arm --disable-iconv \ |
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--target-os=darwin \ |
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--cc=${CC} --disable-asm \ |
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--sysroot=${SDKROOT} \ |
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--prefix=../${INSTALL}/arm64 \ |
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--enable-gpl --enable-nonfree --enable-version3 --disable-bzlib --enable-small --disable-vda \ |
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--disable-encoders --enable-libx264 --enable-libfaac --enable-encoder=libx264 --enable-encoder=libfaac \ |
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--disable-muxers --enable-muxer=flv --enable-muxer=mov --enable-muxer=ipod --enable-muxer=mpegts --enable-muxer=psp --enable-muxer=mp4 --enable-muxer=avi \ |
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--disable-decoders --enable-decoder=aac --enable-decoder=aac_latm --enable-decoder=h264 --enable-decoder=mpeg4 \ |
||||
--disable-demuxers --enable-demuxer=flv --enable-demuxer=h264 --enable-demuxer=avi --enable-demuxer=mpegts --enable-demuxer=mpc --enable-demuxer=mov \ |
||||
--disable-parsers --enable-parser=aac --enable-parser=ac3 --enable-parser=h264 \ |
||||
--disable-protocols --enable-protocol=file --enable-protocol=rtmp --enable-protocol=rtp --enable-protocol=udp \ |
||||
--disable-bsfs --enable-bsf=aac_adtstoasc --enable-bsf=h264_mp4toannexb \ |
||||
--disable-devices --disable-debug --disable-ffmpeg --disable-ffprobe --disable-ffplay --disable-ffserver --disable-debug |
||||
|
||||
make |
||||
make install |
||||
|
||||
cd .. |
||||
``` |
||||
|
||||
### 1.6 编译i386版本FFmpeg类库 |
||||
|
||||
这一步用于生成支持i386架构的thin版本的FFmpeg类库，存储于thin-ffmpeg/i386文件夹中。脚本如下所示。 |
||||
|
||||
#### 1.6.1 build_ffmpeg_demo_i386.sh |
||||
|
||||
``` |
||||
build_ffmpeg_demo_i386.sh |
||||
#!/bin/sh |
||||
# LXH,MXY modified |
||||
|
||||
cd ffmpeg |
||||
|
||||
PLATFORM="iPhoneSimulator" |
||||
INSTALL="thin-ffmpeg" |
||||
SDK_VERSION="8.3" |
||||
|
||||
# libx264 |
||||
export X264ROOT=../thin-x264/i386 |
||||
export X264LIB=$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。 |
||||
|
||||
 |
||||
|
||||
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。 |
||||
|
||||
 |
||||
|
||||
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。 |
||||
|
||||
 |
||||
|
||||
单击“AVFormat”按钮内容如下所示。 |
||||
|
||||
 |
||||
|
||||
单击“AVCodec”按钮内容如下所示。 |
||||
|
||||
 |
||||
|
||||
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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