FFmpeg building for iOS 8.3

最新推荐文章于 2021-04-30 02:56:13 发布

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本文介绍了一个用于iOS平台的FFmpeg编译脚本，该脚本支持多个架构包括arm64、armv7等，并能根据需求选择是否集成x264和FDK_AAC库。此外，还提供了如何安装依赖工具如yasm和gas-preprocessor.pl的方法。

https://github.com/kewlbear/FFmpeg-iOS-build-script

#!/bin/sh

	# directories
	SOURCE="ffmpeg-2.6.3"
	FAT="FFmpeg-iOS"

	SCRATCH="scratch"
	# must be an absolute path
	THIN=`pwd`/"thin"

	# absolute path to x264 library
	#X264=`pwd`/fat-x264

	#FDK_AAC=`pwd`/fdk-aac/fdk-aac-ios

	CONFIGURE_FLAGS="--enable-cross-compile --disable-debug --disable-programs \
	--disable-doc --enable-pic"

	if [ "$X264" ]
	then
	CONFIGURE_FLAGS="$CONFIGURE_FLAGS --enable-gpl --enable-libx264"
	fi

	if [ "$FDK_AAC" ]
	then
	CONFIGURE_FLAGS="$CONFIGURE_FLAGS --enable-libfdk-aac"
	fi

	# avresample
	#CONFIGURE_FLAGS="$CONFIGURE_FLAGS --enable-avresample"

	ARCHS="arm64 armv7 x86_64 i386"

	COMPILE="y"
	LIPO="y"

	DEPLOYMENT_TARGET="6.0"

	if [ "$*" ]
	then
	if [ "$*" = "lipo" ]
	then
	# skip compile
	COMPILE=
	else
	ARCHS="$*"
	if [ $# -eq 1 ]
	then
	# skip lipo
	LIPO=
	fi
	fi
	fi

	if [ "$COMPILE" ]
	then
	if [ ! `which yasm` ]
	then
	echo 'Yasm not found'
	if [ ! `which brew` ]
	then
	echo 'Homebrew not found. Trying to install...'
	ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)" \
	\|\| exit 1
	fi
	echo 'Trying to install Yasm...'
	brew install yasm \|\| exit 1
	fi
	if [ ! `which gas-preprocessor.pl` ]
	then
	echo 'gas-preprocessor.pl not found. Trying to install...'
	(curl -L https://github.com/libav/gas-preprocessor/raw/master/gas-preprocessor.pl \
	-o /usr/local/bin/gas-preprocessor.pl \
	&& chmod +x /usr/local/bin/gas-preprocessor.pl) \
	\|\| exit 1
	fi

	if [ ! -r $SOURCE ]
	then
	echo 'FFmpeg source not found. Trying to download...'
	curl http://www.ffmpeg.org/releases/$SOURCE.tar.bz2 \| tar xj \
	\|\| exit 1
	fi

	CWD=`pwd`
	for ARCH in $ARCHS
	do
	echo "building $ARCH..."
	mkdir -p "$SCRATCH/$ARCH"
	cd "$SCRATCH/$ARCH"

	CFLAGS="-arch $ARCH"
	if [ "$ARCH" = "i386" -o "$ARCH" = "x86_64" ]
	then
	PLATFORM="iPhoneSimulator"
	CFLAGS="$CFLAGS -mios-simulator-version-min=$DEPLOYMENT_TARGET"
	else
	PLATFORM="iPhoneOS"
	CFLAGS="$CFLAGS -mios-version-min=$DEPLOYMENT_TARGET"
	if [ "$ARCH" = "arm64" ]
	then
	EXPORT="GASPP_FIX_XCODE5=1"
	fi
	fi

	XCRUN_SDK=`echo $PLATFORM \| tr '[:upper:]' '[:lower:]'`
	CC="xcrun -sdk $XCRUN_SDK clang"
	CXXFLAGS="$CFLAGS"
	LDFLAGS="$CFLAGS"
	if [ "$X264" ]
	then
	CFLAGS="$CFLAGS -I$X264/include"
	LDFLAGS="$LDFLAGS -L$X264/lib"
	fi
	if [ "$FDK_AAC" ]
	then
	CFLAGS="$CFLAGS -I$FDK_AAC/include"
	LDFLAGS="$LDFLAGS -L$FDK_AAC/lib"
	fi

	TMPDIR=${TMPDIR/%\/} $CWD/$SOURCE/configure \
	--target-os=darwin \
	--arch=$ARCH \
	--cc="$CC" \
	$CONFIGURE_FLAGS \
	--extra-cflags="$CFLAGS" \
	--extra-cxxflags="$CXXFLAGS" \
	--extra-ldflags="$LDFLAGS" \
	--prefix="$THIN/$ARCH" \
	\|\| exit 1

	make -j3 install $EXPORT \|\| exit 1
	cd $CWD
	done
	fi

	if [ "$LIPO" ]
	then
	echo "building fat binaries..."
	mkdir -p $FAT/lib
	set - $ARCHS
	CWD=`pwd`
	cd $THIN/$1/lib
	for LIB in *.a
	do
	cd $CWD
	echo lipo -create `find $THIN -name $LIB` -output $FAT/lib/$LIB 1>&2
	lipo -create `find $THIN -name $LIB` -output $FAT/lib/$LIB \|\| exit 1
	done

	cd $CWD
	cp -rf $THIN/$1/include $FAT
	fi

	echo Done