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最简单的基于FFmpeg的移动端例子:IOS HelloWorld
最简单的基于FFmpeg的移动端例子系列文章列表:
最简单的基于FFmpeg的移动端例子:Android HelloWorld
最简单的基于FFmpeg的移动端例子:Android 视频解码器
最简单的基于FFmpeg的移动端例子:Android 视频解码器-单个库版
最简单的基于FFmpeg的移动端例子:Android 推流器
最简单的基于FFmpeg的移动端例子:Android 视频转码器
最简单的基于FFmpeg的移动端例子附件:Android 自带播放器
最简单的基于FFmpeg的移动端例子附件:SDL Android HelloWorld
最简单的基于FFmpeg的移动端例子:IOS HelloWorld
最简单的基于FFmpeg的移动端例子:IOS 视频解码器
最简单的基于FFmpeg的移动端例子:IOS 推流器
最简单的基于FFmpeg的移动端例子:IOS 视频转码器
最简单的基于FFmpeg的移动端例子附件:IOS自带播放器
最简单的基于FFmpeg的移动端例子:Windows Phone 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。
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) 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。
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 $FAT
(2) 第三方库libfaac的编译
这一步用于生成支持armv7、armv7s、arm64、i386、x86_64几种架构的fat版本的libfaac.a。下面这个脚本可以首先编译生成上面5种架构的thin版本的libfaac.a,分成5个文件夹存储于fat-faac中;然后将这些类库合并成为1个fat版本的libfaac.a,存储于fat-faac中。
build_faac.sh
- #!/bin/sh
- cd ./faac
- make distclean
- cd ..
- CONFIGURE_FLAGS="--enable-static --with-pic"
- ARCHS="arm64 armv7s x86_64 i386 armv7"
- # directories
- SOURCE="faac"
- FAT="fat-faac"
- SCRATCH="scratch-faac"
- # must be an absolute path
- THIN=`pwd`/"thin-faac"
- COMPILE="y"
- LIPO="y"
- if [ "$*" ]
- 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 $FAT
(3) 编译armv7版本FFmpeg类库
这一步用于生成支持armv7架构的thin版本的FFmpeg类库,存储于thin-ffmpeg/armv7文件夹中。脚本如下所示。
build_ffmpeg_demo_armv7.sh
- #!/bin/sh
- # LXH,MXY modified
- cd ffmpeg
- PLATFORM="iPhoneOS"
- INSTALL="thin-ffmpeg"
- SDK_VERSION="8.3"
- # libx264
- export X264ROOT=../thin-x264/armv7
- export X264LIB=$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=../${INSTALL}/armv7 \
- --enable-gpl --enable-nonfree --enable-version3 --disable-bzlib --enable-small --disable-vda \
- --disable-encoders --enable-libx264 --enable-libfaac --enable-encoder=libx264 --enable-encoder=libfaac \
- --disable-muxers --enable-muxer=flv --enable-muxer=mov --enable-muxer=ipod --enable-muxer=mpegts --enable-muxer=psp --enable-muxer=mp4 --enable-muxer=avi \
- --disable-decoders --enable-decoder=aac --enable-decoder=aac_latm --enable-decoder=h264 --enable-decoder=mpeg4 \
- --disable-demuxers --enable-demuxer=flv --enable-demuxer=h264 --enable-demuxer=mpegts --enable-demuxer=avi --enable-demuxer=mpc --enable-demuxer=mov \
- --disable-parsers --enable-parser=aac --enable-parser=ac3 --enable-parser=h264 \
- --disable-protocols --enable-protocol=file --enable-protocol=rtmp --enable-protocol=rtp --enable-protocol=udp \
- --disable-bsfs --enable-bsf=aac_adtstoasc --enable-bsf=h264_mp4toannexb \
- --disable-devices --disable-debug --disable-ffmpeg --disable-ffprobe --disable-ffplay --disable-ffserver --disable-debug
- make
- make install
- cd ..
(4) 编译armv7s版本FFmpeg类库
这一步用于生成支持armv7s架构的thin版本的FFmpeg类库,存储于thin-ffmpeg/armv7s文件夹中。脚本如下所示。
build_ffmpeg_demo_armv7s.sh
- #!/bin/sh
- # LXH,MXY modified
- cd ffmpeg
- PLATFORM="iPhoneOS"
- INSTALL="thin-ffmpeg"
- SDK_VERSION="8.3"
- # libx264
- export X264ROOT=../thin-x264/armv7s
- export X264LIB=$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=../${INSTALL}/armv7s \
- --enable-gpl --enable-nonfree --enable-version3 --disable-bzlib --enable-small --disable-vda \
- --disable-encoders --enable-libx264 --enable-libfaac --enable-encoder=libx264 --enable-encoder=libfaac \
- --disable-muxers --enable-muxer=flv --enable-muxer=mov --enable-muxer=ipod --enable-muxer=mpegts --enable-muxer=psp --enable-muxer=mp4 --enable-muxer=avi \
- --disable-decoders --enable-decoder=aac --enable-decoder=aac_latm --enable-decoder=h264 --enable-decoder=mpeg4 \
- --disable-demuxers --enable-demuxer=flv --enable-demuxer=h264 --enable-demuxer=avi --enable-demuxer=mpegts --enable-demuxer=mpc --enable-demuxer=mov \
- --disable-parsers --enable-parser=aac --enable-parser=ac3 --enable-parser=h264 \
- --disable-protocols --enable-protocol=file --enable-protocol=rtmp --enable-protocol=rtp --enable-protocol=udp \
- --disable-bsfs --enable-bsf=aac_adtstoasc --enable-bsf=h264_mp4toannexb \
- --disable-devices --disable-debug --disable-ffmpeg --disable-ffprobe --disable-ffplay --disable-ffserver --disable-debug
- make
- make install
- cd ..
(5) 编译arm64版本FFmpeg类库
这一步用于生成支持arm64架构的thin版本的FFmpeg类库,存储于thin-ffmpeg/arm64文件夹中。脚本如下所示。
build_ffmpeg_demo_arm64.sh
- #!/bin/sh
- # LXH,MXY modified
- cd ffmpeg
- PLATFORM="iPhoneOS"
- INSTALL="thin-ffmpeg"
- SDK_VERSION="8.3"
- # libx264
- export X264ROOT=../thin-x264/arm64
- export X264LIB=$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=../${INSTALL}/arm64 \
- --enable-gpl --enable-nonfree --enable-version3 --disable-bzlib --enable-small --disable-vda \
- --disable-encoders --enable-libx264 --enable-libfaac --enable-encoder=libx264 --enable-encoder=libfaac \
- --disable-muxers --enable-muxer=flv --enable-muxer=mov --enable-muxer=ipod --enable-muxer=mpegts --enable-muxer=psp --enable-muxer=mp4 --enable-muxer=avi \
- --disable-decoders --enable-decoder=aac --enable-decoder=aac_latm --enable-decoder=h264 --enable-decoder=mpeg4 \
- --disable-demuxers --enable-demuxer=flv --enable-demuxer=h264 --enable-demuxer=avi --enable-demuxer=mpegts --enable-demuxer=mpc --enable-demuxer=mov \
- --disable-parsers --enable-parser=aac --enable-parser=ac3 --enable-parser=h264 \
- --disable-protocols --enable-protocol=file --enable-protocol=rtmp --enable-protocol=rtp --enable-protocol=udp \
- --disable-bsfs --enable-bsf=aac_adtstoasc --enable-bsf=h264_mp4toannexb \
- --disable-devices --disable-debug --disable-ffmpeg --disable-ffprobe --disable-ffplay --disable-ffserver --disable-debug
- make
- make install
- cd ..
(6) 编译i386版本FFmpeg类库
这一步用于生成支持i386架构的thin版本的FFmpeg类库,存储于thin-ffmpeg/i386文件夹中。脚本如下所示。
build_ffmpeg_demo_i386.sh
- #!/bin/sh
- # LXH,MXY modified
- cd ffmpeg
- PLATFORM="iPhoneSimulator"
- INSTALL="thin-ffmpeg"
- SDK_VERSION="8.3"
- # libx264
- export X264ROOT=../thin-x264/i386
- export X264LIB=$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 ..
(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。
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。
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((voidvoid **)p_temp, 0);
- while ((*p_temp) != NULL){
- sprintf(info, "%s[In ][%10s]\n", info, avio_enum_protocols((voidvoid **)p_temp, 0));
- }
- pup = NULL;
- //Output
- avio_enum_protocols((voidvoid **)p_temp, 1);
- while ((*p_temp) != NULL){
- sprintf(info, "%s[Out][%10s]\n", info, avio_enum_protocols((voidvoid **)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
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。
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
最简单的基于FFmpeg的移动端例子:IOS HelloWorld