FFmpeg for iOS cross-compilation (i686 armv7 armv7s) with lame support

Http://www.cppblog.com/Khan/archive/2012/12/13/196216.html

Because the project also requires MP3 audio encoding, you must first download the lame source code to build a cross environment, and enter the following compilation script build. Sh 1 # Under the lame directory #! /Bin/sh
2
3
4 sdk_version = "6.0"
5
6 Rm-RF build
7 mkdir build
8
9 function build_lame ()
10 {
11 make distclean
12
13./configure \
14 cflags = "-isysroot/applications/xcode. APP/contents/developer/platforms/$ {SDK }. platform/developer/sdks/$ {SDK }$ {sdk_version }. SDK "\
15 cc = "/applications/xcode. APP/contents/developer/platforms/$ {SDK}. Platform/developer/usr/bin/GCC-arch $ {platform }"\
16 -- prefix =/users/Khan/downloads/lame-3.99.5 \
17 -- Host = "arm-apple-darwin9 "\
18 -- disable-shared \
19 -- enable-static \
20 -- disable-decoder \
21 -- disable-frontend
22
23 make
24 CP "libmp 3lame/. libs/libmp 3lame. A" "build/libmp 3lame-$ {platform}."
25}
26
27 platform = "i686"
28 SDK = "iphonesimulator"
29 build_lame
30
31 # armv6 and armv7 are difficult to coexist
32 # platform = "armv6"
33 # SDK = "iphoneos"
34 # build_lame
35
36 platform = "armv7"
37 SDK = "iphoneos"
38 build_lame
39
40 platform = "armv7s"
41 SDK = "iphoneos"
42 build_lame
43
44 lipo-create build/*-output build/libmp 3lame. A first go to https://github.com/yuvi/gas-preprocessor/download gas-preprocessor.pl, and then copy it to the/usr/sbin/directory (of course, you can put it in any directory, just make sure the -- As = '/$ {path}/gas-preprocessor.pl' path is correct)

Http://ffmpeg.org/download.html download FFMPEG source code, git or direct download

The terminal executes the following command # armv7s. /configure -- disable-doc -- disable-FFMPEG -- disable-ffplay -- disable-ffserver -- enable-pic -- enable-Cross-compile -- enable-decoder = h264 -- enable-libmp3lame \ -- arch = arm -- disable-ASM \ -- target-OS = Darwin -- cc =/applications/xcode. APP/contents/developer/platforms/iphoneos. platform/developer/usr/bin/GCC \ -- As = 'Gas-Preprocessor. PL/applications/xcode. APP/contents/developer/platforms/iphoneos. platform/developer/usr/bin/GCC '\ -- sysroot =/applications/xcode. APP/contents/developer/platforms/iphoneos. platform/developer/sdks/iphoneos6.0.sdk \ -- CPU = cortex-a8 \ -- extra-cflags = '-arch armv7s-I/users/Khan/downloads/lame-3.99.5/include' \ -- extra -ldflags = '-arch armv7s-L/users/Khan/downloads/lame-3.99.5/build-lmp3lame-isysroot/applications/xcode. APP/contents/developer/platforms/iphoneos. platform/developer/sdks/iphoneos6.0.sdk '\ -- prefix =/users/Khan/downloads/FFMPEG/arm7s. lib
Make
Make install

Make clean

# Armv7./configure -- disable-doc -- disable-FFMPEG -- disable-ffplay -- disable-ffserver -- enable-pic -- enable-Cross-compile -- enable-decoder = h264 -- enable-libmp3lame \-- disable-ASM -- arch = Arm \ -- target-OS = Darwin -- cc =/applications/xcode. APP/contents/developer/platforms/iphoneos. platform/developer/usr/bin/GCC \ -- As = 'Gas-Preprocessor. PL/applications/xcode. APP/contents/developer/platforms/iphoneos. platform/developer/usr/bin/GCC '\ -- sysroot =/applications/xcode. APP/contents/developer/platforms/iphoneos. platform/developer/sdks/iphoneos6.0.sdk \ -- CPU = cortex-a8 \ -- extra-cflags = '-arch armv7-I/users/Khan/downloads/lame-3.99.5/include' \ -- extra -ldflags = '-arch armv7-L/users/Khan/downloads/lame-3.99.5/build-lmp3lame-isysroot/applications/xcode. APP/contents/developer/platforms/iphoneos. platform/developer/sdks/iphoneos6.0.sdk '\ -- prefix =/users/Khan/downloads/FFMPEG/arm7.lib
Make
Make install

Make clean

# I686./configure -- disable-doc -- disable-FFMPEG -- disable-ffplay -- disable-ffserver -- enable-pic -- enable-Cross-compile -- enable-decoder = h264 -- enable-libmp3lame \-- disable-ASM -- arch = i686 -- CPU = i686 -- disable-armv5te \ -- target-OS = Darwin -- cc =/applications/xcode. APP/contents/developer/platforms/iphonesimulator. platform/developer/usr/bin/GCC \ -- As = 'Gas-Preprocessor. PL/applications/xcode. APP/contents/developer/platforms/iphonesimulator. platform/developer/usr/bin/GCC '\ -- sysroot =/applications/xcode. APP/contents/developer/platforms/iphonesimulator. platform/developer/sdks/iphonesimulator6.0.sdk \ -- extra-ldflags =-L/applications/xcode. APP/contents/developer/platforms/iphonesimulator. platform/developer/sdks/iphonesimulator6.0.sdk/usr/lib/System \ -- extra-cflags = '-arch i686-I/users/Khan/downloads/lame-3.99.5/include '\-- extra-ldflags = '-arch i686-L/users/Khan/downloads/lame-3.99.5/build-lmp3lame' \ -- prefix =/users/Khan/downloads/FFMPEG/i686.libmake
Make install
Make clean

-- Prefix =/users/Khan/downloads/FFMPEG/i686.lib/
Then, you can run the Lib lipo in each directory on the simulator and on the real machine with various instruction sets.

Lipo-create i686.lib/lib/libavcodec. A arm7.lib/lib/libavcodec. A arm7s. LIB/lib/libavcodec. a-output build/libavcodec. alipo-create i686.lib/lib/libavdevice. A arm7.lib/lib/libavdevice. A arm7s. LIB/lib/libavdevice. a-output build/libavdevice. alipo-create i686.lib/lib/libavfilter. A arm7.lib/lib/libavfilter. A arm7s. LIB/lib/libavfilter. a-output build/libavfilter. alipo-create i686.lib/lib/libavformat. A arm7.lib/lib/libavformat. A arm7s. LIB/lib/libavformat. a-output build/libavformat. alipo-create i686.lib/lib/libavutil. A arm7.lib/lib/libavutil. A arm7s. LIB/lib/libavutil. a-output build/libavutil. alipo-create i686.lib/lib/libswresample. A arm7.lib/lib/libswresample. A arm7s. LIB/lib/libswresample. a-output build/libswresample. alipo-create i686.lib/lib/libswscale. A arm7.lib/lib/libswscale. A arm7s. LIB/lib/libswscale. a-output build/libswscale. A