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上篇日志里做的demo没有音频解码部分，而且也没有控制音量大小缓冲等视频播放器功能。

在网上找到一个kxmovie的播放器的例子，一样要编译ffmpeg。但是把先前编译好的lib放入新工程中，编译不能通过。
结论是：先前编译的库这个工程用不了。

这下我十分的困惑。
上个例子中缺少音频部分的解码，只能作这样的猜测。

于是想办法按照kxmovie的readme重新编译ffmpeg库。
但是，尼玛的，不仅仅是它，网上一堆人都说按照这个成功编译了，纯属放屁。

我把要编译的代码改了一些，才能通过。

可以远程在线播放视频，也可以播放本地视频，支持任何格式，支持播放器功能。

至此，编译ffmpeg在线播放任何视频格式的问题就此结束。


我的sdk:8.1
    Xcode6.1
    mac os x 10.9.5
改动后的代码如下：

require "pathname"

require "fileutils"

def system_or_exit(cmd, stdout = nil)

puts "Executing #{cmd}"

cmd += " >#{stdout}" if stdout

system(cmd) or raise "******** Build failed ********"

end

## build ffmpeg

XCODE_PATH='/Applications/Xcode.app/Contents/Developer/Platforms'

#GCC_PATH='/Developer/usr/bin/gcc'

GCC_PATH='/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang'

LIB_PATH='/usr/lib/system'

PLATOFRM_PATH_SIM ='/iPhoneSimulator.platform'

PLATOFRM_PATH_IOS ='/iPhoneOS.platform'

SDK_VERSION = '8.1'

SIM_SDK = 'iphonesimulator' + SDK_VERSION

IOS_SDK = 'iphoneos' + SDK_VERSION

#SDK_PATH_SIM ='/Developer/SDKs/iPhoneSimulator8.1.sdk'

#SDK_PATH_IOS='/Developer/SDKs/iPhoneOS8.1.sdk'

SDK_PATH_SIM ='/Developer/SDKs/iPhoneSimulator' + SDK_VERSION + '.sdk'

SDK_PATH_IOS='/Developer/SDKs/iPhoneOS' + SDK_VERSION + '.sdk'

FFMPEG_BUILD_ARGS_SIM = [

'--assert-level=2',

'--disable-mmx',

'--arch=i386',

'--cpu=i386',

"--extra-ldflags='-arch i386 -miphoneos-version-min=7.0'",

"--extra-cflags='-arch i386 -mfpu=neon -miphoneos-version-min=7.0'",

'--disable-asm',

]

FFMPEG_BUILD_ARGS_ARMV7 = [

'--arch=arm',

'--cpu=cortex-a8',

'--enable-pic',

"--extra-cflags='-arch armv7 -mfpu=neon -miphoneos-version-min=7.0'",

"--extra-ldflags='-arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS8.1.sdk -miphoneos-version-min=7.0'",

'--enable-neon',

'--enable-optimizations',

'--disable-debug',

'--disable-armv5te',

'--disable-armv6',

'--disable-armv6t2',

'--enable-small',

'--disable-asm',

]

FFMPEG_BUILD_ARGS_ARMV7S = [

'--arch=arm',

'--cpu=cortex-a8',

'--enable-pic',

"--extra-cflags='-arch armv7s -mfpu=neon -miphoneos-version-min=7.0'",

"--extra-ldflags='-arch armv7s -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS8.1.sdk -miphoneos-version-min=7.0'",

'--enable-neon',

'--enable-optimizations',

'--disable-debug',

'--disable-armv5te',

'--disable-armv6',

'--disable-armv6t2',

'--enable-small',

'--disable-asm',

]

FFMPEG_BUILD_ARGS = [

'--disable-ffmpeg',

'--disable-ffplay',

'--disable-ffserver',

'--disable-ffprobe',

'--disable-doc',

'--disable-bzlib',

'--target-os=darwin',

'--enable-cross-compile',

#'--enable-nonfree',

'--enable-gpl',

'--enable-version3',

'--disable-asm',

]

FFMPEG_LIBS = [

'libavcodec',

'libavformat',

'libavutil',

'libswscale',

'libswresample',

]

def mkArgs(platformPath, sdkPath, platformArgs)

#cc = '--cc=' + XCODE_PATH + platformPath + GCC_PATH

cc = '--cc=' + GCC_PATH

sysroot = '--sysroot=' + XCODE_PATH + platformPath + sdkPath

extra = '--extra-ldflags=-L' + XCODE_PATH + platformPath + sdkPath + LIB_PATH

args = FFMPEG_BUILD_ARGS + platformArgs

args << cc

args << sysroot

args << extra

args.join(' ')

end

def moveLibs(dest)

FFMPEG_LIBS.each do |x|

FileUtils.move Pathname.new("ffmpeg/#{x}/#{x}.a"), dest

end

end

def ensureDir(path)

dest = Pathname.new path

if dest.exist?

FileUtils.rm Dir.glob("#{path}/*.a")

else

dest.mkdir

end

dest

end

def buildArch(arch)

case arch

when 'i386'

args = mkArgs(PLATOFRM_PATH_SIM, SDK_PATH_SIM, FFMPEG_BUILD_ARGS_SIM)

when 'armv7'

args = mkArgs(PLATOFRM_PATH_IOS, SDK_PATH_IOS, FFMPEG_BUILD_ARGS_ARMV7)

when 'armv7s'

args = mkArgs(PLATOFRM_PATH_IOS, SDK_PATH_IOS, FFMPEG_BUILD_ARGS_ARMV7S)

else

raise "Build failed: unknown arch: #{arch}"

end

dest = ensureDir('ffmpeg/' + arch)

system_or_exit "cd ffmpeg; ./configure #{args}"

system_or_exit "cd ffmpeg; make"

moveLibs(dest)

system_or_exit "cd ffmpeg; make clean"

end

def mkLipoArgs(lib)

"-create -arch armv7 armv7/#{lib}.a -arch armv7 armv7s/#{lib}.a -arch i386 i386/#{lib}.a -output universal/#{lib}.a"

end

desc "check gas-preprocessor.pl"

task :check_gas_preprocessor do

found = false

ENV['PATH'].split(':').each do |x|

p = Pathname.new(x) + 'gas-preprocessor.pl'

if p.exist? && p.writable?

found = true

break;

end

#print p

end

unless found

raise "Build failed: first install gas-preprocessor.pl.\nSee http://stackoverflow.com/questions/5056600/how-to-install-gas-preprocessor for more info."

end

end

desc "Clean ffmpeg"

task :clean_ffmpeg do

system_or_exit "cd ffmpeg; make clean"

end

desc "Build ffmpeg i386 libs"

task :build_ffmpeg_i386 do

buildArch('i386')

end

desc "Build ffmpeg armv7 libs"

task :build_ffmpeg_armv7 do

buildArch('armv7')

end

desc "Build ffmpeg armv7s libs"

task :build_ffmpeg_armv7s do

buildArch('armv7s')

end

desc "Build ffmpeg universal libs"

task :build_ffmpeg_universal do

ensureDir('ffmpeg/universal')

FFMPEG_LIBS.each do |x|

args = mkLipoArgs(x)

system_or_exit "cd ffmpeg; lipo #{args}"

end

dest = ensureDir('libs')

FFMPEG_LIBS.each do |x|

FileUtils.move Pathname.new("ffmpeg/universal/#{x}.a"), dest

end

end

## build libkxmovie

def cleanMovieLib(config)

buildDir = Pathname.new 'tmp/build'

system_or_exit "xcodebuild -project kxmovie.xcodeproj -target kxmovie -configuration #{config} -sdk #{IOS_SDK} clean SYMROOT=#{buildDir}"

system_or_exit "xcodebuild -project kxmovie.xcodeproj -target kxmovie -configuration #{config} -sdk #{SIM_SDK} clean SYMROOT=#{buildDir}"

end

desc "Clean libkxmovie-debug"

task :clean_movie_debug do

cleanMovieLib 'Debug'

end

desc "Clean libkxmovie-release"

task :clean_movie_release do

cleanMovieLib 'Release'

end

desc "Build libkxmovie-debug"

task :build_movie_debug do

buildDir = Pathname.new 'tmp/build'

system_or_exit "xcodebuild -project kxmovie.xcodeproj -target kxmovie -configuration Debug -sdk #{IOS_SDK} build SYMROOT=#{buildDir} -arch armv7s"

FileUtils.move Pathname.new('tmp/build/Debug-iphoneos/libkxmovie.a'), Pathname.new('tmp/build/Debug-iphoneos/libkxmovie_armv7s.a')

system_or_exit "xcodebuild -project kxmovie.xcodeproj -target kxmovie -configuration Debug -sdk #{IOS_SDK} build SYMROOT=#{buildDir} -arch armv7"

system_or_exit "xcodebuild -project kxmovie.xcodeproj -target kxmovie -configuration Debug -sdk #{SIM_SDK} build SYMROOT=#{buildDir}"

system_or_exit "lipo -create -arch armv7 tmp/build/Debug-iphoneos/libkxmovie.a -arch armv7 tmp/build/Debug-iphoneos/libkxmovie_armv7s.a -arch i386 tmp/build/Debug-iphonesimulator/libkxmovie.a -output tmp/build/libkxmovie.a"

end

desc "Build libkxmovie-release"

task :build_movie_release do

buildDir = Pathname.new 'tmp/build'

system_or_exit "xcodebuild -project kxmovie.xcodeproj -target kxmovie -configuration Release -sdk #{IOS_SDK} build SYMROOT=#{buildDir} -arch armv7s"

FileUtils.move Pathname.new('tmp/build/Release-iphoneos/libkxmovie.a'), Pathname.new('tmp/build/Release-iphoneos/libkxmovie_armv7s.a')

system_or_exit "xcodebuild -project kxmovie.xcodeproj -target kxmovie -configuration Release -sdk #{IOS_SDK} build SYMROOT=#{buildDir} -arch armv7"

system_or_exit "xcodebuild -project kxmovie.xcodeproj -target kxmovie -configuration Debug -sdk #{SIM_SDK} build SYMROOT=#{buildDir}"

system_or_exit "lipo -create -arch armv7 tmp/build/Release-iphoneos/libkxmovie.a -arch armv7 tmp/build/Release-iphoneos/libkxmovie_armv7s.a -arch i386 tmp/build/Debug-iphonesimulator/libkxmovie.a -output tmp/build/libkxmovie.a"

#FileUtils.copy Pathname.new('tmp/build/Release-iphoneos/libkxmovie.a'), buildDir

end

desc "Copy to output folder"

task :copy_movie do

dest = ensureDir 'output'

FileUtils.move Pathname.new('tmp/build/libkxmovie.a'), dest

FileUtils.copy Pathname.new('libs/libavcodec.a'), dest

FileUtils.copy Pathname.new('libs/libavformat.a'), dest

FileUtils.copy Pathname.new('libs/libavutil.a'), dest

FileUtils.copy Pathname.new('libs/libswscale.a'), dest

FileUtils.copy Pathname.new('libs/libswresample.a'), dest

FileUtils.copy Pathname.new('kxmovie/KxMovieViewController.h'), dest

FileUtils.copy Pathname.new('kxmovie/KxAudioManager.h'), dest

FileUtils.copy Pathname.new('kxmovie/KxMovieDecoder.h'), dest

FileUtils.copy_entry Pathname.new('kxmovie/kxmovie.bundle'), dest + 'kxmovie.bundle'

end

##

task :clean => [:clean_movie_debug, :clean_movie_release, :clean_ffmpeg]

task :build_ffmpeg => [:check_gas_preprocessor, :build_ffmpeg_i386, :build_ffmpeg_armv7, :build_ffmpeg_armv7s, :build_ffmpeg_universal]

#task :build_movie => [:build_movie_debug, :copy_movie]

task :build_movie => [:build_movie_release, :copy_movie]

task :build_all => [:build_ffmpeg, :build_movie]

task :default => [:build_all] 

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标题名称：ios8.1下继续编译ffmpeg做完整功能的播放器-创新互联
文章出自：http://pwwzsj.com/article/deohdj.html